ML20078M243

Forwards Responses to 830920 & 21 Requests for Addl Info Re Analog Instrumentation Installation.Startup Projected for 831128

ML20078M243
Person / Time
Site:	Browns Ferry
Issue date:	10/20/1983
From:	Mills L TENNESSEE VALLEY AUTHORITY
To:	Harold Denton Office of Nuclear Reactor Regulation
References
NUDOCS 8310250082
Download: ML20078M243 (64)

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TENNESSEE VALLEY AUTHORITY CHATTANOGGA, TENNESSEE 37401 400 Chestnut Street Tower II October 20, 1983 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Dear Mr. Denton:

In the Matter of the ) Docket No. 50-259 Tennessee Valley Authority )

By letters from D. B. Vassallo to H. G. Parris dated September 20 and 21, 1983, we received requests for additional information regarding the analog instrumentation being installed on Browns Ferry ,

unit 1. Our response to the letter dated September 21, 1983 is provided in enclosure 1. Response to the September 20 letter is provided in unclosure 2.

Startup of Brownc Ferry unit 1 is projected for November 28, 1983 Very truly yours, TENNESSEE VALLEY AUTHORITY L. . Mills, Mar {ager Nuclear Licensing Subscribeg me thiso(hMaQdaysworn of t ber re' J o 1983 haaffAL Y. M A 8 Notary Public My Commission Expires -"

Enclosures cc: See page 2 3

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0310250082 PDR ADOCK

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An Equal Opportunity Employer

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Mr. Harold R. Denton October 20, 1983 cc (Enclosures):

U.S. Nuclear Regulatory Commission Region II ATTN: James P. O'Reilly, Regional Administrator 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30303 i

Mr. R. J. Clark Browns Ferry Project Manager U.S. Nuclear Regulatory Commission 7920 Norfolk Avenue Bethesda, Maryland 20814 1

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ENCLOSURE 1 RESPONSE TO LETTER FROM D. B. VASSALLO TO H. G. PARRIS DATED SEPTEMBER 21, 1983

. REGARDING ANALOG TRIP SYSTEM BROWNS FERRY NUCLEAR PLANT UNIT 1 QUESTION 1 It is apparent from a review of the modifications to the Technical Specifications that not all channel functional tests are to be performed at 31-day intervals (e.g., Table 4.1.A, Turbine first stage pressure permissive specifies 3 month intervals). Also, Table 4.1.A Note 7 does not discuss adjustments, if necessary, of the alarm, interlock and/or trip setpoints such that the setpoints are within the required range and accuracy. With the proposed Technical Specifications, the NRC staff believes that the reactor protection system instrument setpoints are to be verified only at 18-month intervals during the channel calibration for most channels. Although the staff has not performed a detailed review of the methodology used to establish the trip setpoints for the Browns Ferry facility, the assumptions of the setpoint methodology typically ueed for the General Electric supplied systems -

would include a more frequent setpoint verification and adjustment.

Therefore, for each reactor protection system instrament channel where the analog trip system has been added, confirm that the method and frequency for determining the trip unit setpoints and resetting the setpoints is consistent with the assumptions of the setpoint methodology and the drift goals for the instrumentation and associated systems.

RESPONSE

Minimum frequencies for functional tests that appear in table 4.1. A were not '

changed from the current technical specifications in the subject submittal.

Since the analog trip instruments have been evaluated and determined to be more reliable than the mechanical switches for which they are a direct replacement, an equal or larger surveillance frequency is justified.

We expect to verify setpoints as part of the functional test for analog trip _

instruments because of the simplicity of doing so. Setpoints which are found to be outside of the range specified by the plant setpoint methodology will be ,

corrected.

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QUESTION 2 The terminology for channel calibration as used in Note 9 of Table 4.1.B does not provide a clear definition as to which components are included.

Therefore, for eafh reactor protection system instrument channel where the analog trip system has been added, confirm that the channel calibration performed at the 18-month interval encompasses the entire channel including the sensors, alarm interlocks, and/or trip functions.

RESPONSE

The purpose of note 9 of table 4.1.B is to augment the definition of instrument calibration (TS 1.V.1) to clarify its applicability to analog trip instruments and associated components. Note 9 states that calibration involves adjustment of components such that the instrument reading corresponds to known values of the process variable, and the trip circuitry be adjusted such that the trip output relay changes state at the proper analog value. In accordance with note 9, the channel calibration performed at 18-month ~

intervals encompasses all of the components including sensors, alarm interlocks, and/or trip functions out to and including the trip output relay.

The remainder of the trip components are logic devices only and are tested during instrument functional tests on a more frequent interval as required by table 4.1.A.

QUESTION 3 It is apparent from a review of the modifications to the Technical Sp:cifications (Table 4.2.A) that not all instrument channel checks are to be performed each shift (e.g., high drywell pressure, reactor low water level, reactor high pressure). This is not consistent with the provisions of the 's Standard Technical Specifications (STS) for this type of instrumentatien. The STS include instrument channel checks each shift. Therefore, for esch reactor protection system channel where the analog trip system has been added, confirm that the instrument channel checks are being performed each shift and propose revised Technical Specifications to document these checks; or justify less ~

! frequent checks.

RESPONSE

l The subject technical specification amendments do not change the frequency of l instrument checks as defined in table 4.2.A. Once/ day checks was previously justified and approved by NRC. Compliance with the Standard Technical Specifications is not a requirement for Browns Ferry.

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f ENCLOSURE 2 RESPONSE TO LETTER FROM D. B. VASSALLO TO H. G. PARRIS DATED SEPTEMBER 20, 1983 REGARDING ANALOG TRIP SYSTEM BROWNS FERRY NUCLEAR PLANT UNIT 1 Topic 1 - Identification of the systems and monitored parameters involved.

Attachment 1 contains a description of the instrumentation to be installed as part of the analog trip system installation at Browns Ferry. Attachment 1 also contains environmental operating conditions under which the instrumentation must operate and the environmental coniitions for which they are qualified including a separate seitsic response evaluation.

Topic 2 - Reference to NRC-approved Topical Reports (i.e., NEDO-21617).

The instrumentation which is installed and will be installed as part of the analog trip system at Browns Ferry is the same or better than the instrumentation which is described in General Electric Company NEDO-21617 Information given in attachment 1 demonstrates applicability of this topical report to the system proposed for Browns Ferry.

Topic 3 - A detailed comparison of the design to the requirements of IEEE Standard 279, GDC 2, GDC 4, GDC 13, GDC 19, GDC 20, GDC 21, GDC 22, GDC 23, GDC 24, GDC 25, and GDC 29 specifically identifying deviations from these requirements.

A comparison of the analog trip system which is being installed at Browns Ferry, the regulatory guides, TEEE standard, and the GDC is contained in attachment 2.

Topic 4 - A detailed discussion of conformance to the following regulatory ~

guides, 1.22, 1.47, 1.53, 1.62, 1.75, 1.105, and 1.118. -

A. comparison of the analog trip system which is being installed at Browns Ferry, the regulatory guides, IEEE standard, and the GDC is contained in attachment 2.

Topic 5 - Identification of the types of isolation devices used as boundaries to isolate nonsafety-related circuits from safety-related circuits or to isolate safety-related circuits.

There are no direct connections between safety-related and nonsafety-related circuits in the analog trip system installed on Browns Ferry unit 1; therefore, isolation devices are not necessary. Isolation between 1E power and non-1E power is provided by mechanical interface relays mounted on the analog trip channel cabin,ets. This interface occurs only between the plant annunciator system and the analog trip circuits for gross failure and card-out alarms. Specifically, the annunciator interface relays have class 1E power at the relay coils supplied by the analog trip unit power supplies, but non-class 1E power is supplied to the relay contacts from the annunciator system power supplies.

Applicable drawings showing RPS logic and wiring diagrams for the RPS analog trip units have been previously provided under separate cover.

! Equipmint Baing Installed '

Vcnd:r Modal No. Transmitter Trip Unit

,Vrriablo Name Being Dalated Systcm Involved TVA In:trumest Loop No.

Model No. Model No. and Division

• R: actor low Barton Rosemount water level Rosemount L-3-203A (IA) L-3-203C (ITA)

Model No. 278 Reactor Protection 1153 710 DU L-3-203B (IB) L-3-203D (IIB)

Reactor high Barksdale Rosemount pr:s:ure Rosemount P-3-22AA (IA) P-3-22C (IIA)

Model No. B2T-A12SS Reactor Protection 1153 710 DU P-3-22BB (IB) P-3-22D (IIB)

Primary Containment Reactor low Yarway isolation and reciro Rosemount i Rosemount L-3-56A (IA) L-3-56C (IIA) low water level Model No. 4418C pump trip 1153 710 DU L-3-56B (IA) L-3-56D (IIB)

Main steam line Barksdale Primary Containment Rosemount Rosemount Icw pressure Model No. B2T-A12SS isolation P-1-72 (IA) ,P-1-82 (IIA) 1153 710 DU P-1-76 (IB)  ;,'P-1-86 (IIB)

Main steam line Barton Primary Containment Rosemount Rosemount high flow Model No. 278 dP-1-13A, -25A, -36A, -50A (IA) isolation 1153 710 DU dP-1-13B, -25B, -36?, -50B (IB)

- dP-1-13C, -25C, -36C, -SOC (IIA) dP-1-13D, -25D, -36D, -50D (IIB)

Primary Static-o-ring Reactor protection

, Containment Model No. 12N- and primary contain- Rosemount h Rosemount P-64-56A (IA) P-64-56C (IIA) );

high pressure AA4-I2PP tent isolation 1153 710 DU P-64-56B (IB) P-64-56D (IIB) 5 Turbinn first Fi 1

Reactor protection stage pres. Barksdale ' ' ' and recire. pump d Rosemount Rosemount P-1-91B (IA)

, parmissive Model No. B2T-A12$$ trip P-1-81B (IIA) ~,

1153 710 DU P-1-91A (IB) P-1-81A (IIB)

Reactor high Static-o-ring Model Recire, pump Rosemount Rosemount pressure No. 9N-AA4-X911 trip P-3-204A (IA) P-3-204C (IIA) 1153 710 DU P-3-2048 (IB) P-3-204D (IIB) i l

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ENVIRONMENTAL QUALIFICATION Transmitter Normal Normal Accident Accident Qualified Qualified No. Temp.(1) Humidity (1) Temp.(1) Humidity (1) Temp.(1) (3) Humidity (1) 1-LT-3-203 A,B,C,D 900F 98% 1800F 100% 3030F ~1 00%

1-PT-3-22

/h.A ,.B , C , D 900F 98% 1800F 1005 3030F 100%

1-LT-3-56 A,B,C,D 900F 98% 1800F 100% 350cp toog 1-PDT-1-13 A,B,C,D 950F 98% 1170F 100% 3500F 100%

1-PDT-1-25 A,B,C,D 950F 98% 1170F 100% 3500F 100%

1-PDT-1-36 A,B,C,D 950F 98% 1170F 1005 3500F 100%

1-PDT-1-50 A,B,C,D 950F 985 1170F 1005 3500F 100%

1-PT-64-56 ~

A,B,C,D 900F 98% 1100F 1005 3030F 100%

1-PT-3-204 A,B,C,D 900F 98% 1000F 100% 3030F 100%

1-PT-1-72, -

76, 82, 86 900F 98% N/A(2) N/A(2) 3030F 100%

1-PT-1-81 A, B, 91A, B 900F 98% N/A(2) N/A(2) 3030F 100%

(1) Maximum (2) Equipment located where it will not be subjected to h'arsh environmental conditions.

(3) The two values of qualified temperature are for series 1153 models B and D.

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ATTACHMENT 2 TABLE OF CONTENTS

1.0 System Description

2.0 General Sumary 30 Detailed Discussion 1

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TABLE 1 Criteria No. Description GDC No. 2 Design basis for protection against natural phenomenon GDC No. 4 Environmental and missile design basis GDC No. 13 Instrumentation and control GDC No. 19 Control room GDC No. 20 Protection system functions GDC No. 21 Protection system reliability and testability -

GDC No. 22 Protection system independence GDC No. 23 Protection system failure modes GDC No. 24 Separation of protection and control systems GDC No. 25 Protection systea requirements for reactivity control malfunctions GDC No. 29 Protection against anticipated operational occurrences RG 1.22 Periodic testing of protection system actuation functions RG 1.47 Bypassed and inoperable status indication for nuclear power plant safety systems RG 1.53 Application of single failure criterion to nuclear power plant safety systems RG 1.62 Manual initiation of protective actions RG 1.75 Physical independence of_ electric systems RG 1.105 Instrument setpoints RG 1.118 Periodic testing of electric power and protection systems IEEE 279-1971 Criteria for protection system REFERENCES -

1. Operations manual trip / calibration system model 710DU (4471-1 Rev. A).

P- Erowns Ferry Nuclear Plant FSAR Section 7.2, " Reactor Protection System."

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1.0 System Description

The primary sensors for the reactor protection system (RPS) are being replaced by Rosemunt transmitters and trip units. Basic RPS operation -

is described in the Browns Ferry Nuclear Plant Final Safety Analysis Report (FSAR) in section 7.2. The following paragraphs only address the changes to the RPS and the impact these changes have on the conformance of the RPS to its design basis and the standards noted in table 1.

2.0 General Summary Discussion The transmitter-trip units are direct rc71acements of the existing mechanical trip switches that provide RPS trip inputs. The selection of which plant variables should be used to provide RPS trip inputs is

-justified in the BFN FSAR in section 7.2 3.6. Since no plant va-iables have been deleted or added due to the installation of the transmitter-type units, the RPS meets the pertinent sections of general design criteria (GDC) 13, 20, 25, and 29.

The trip units are located in four cabinets in the auxiliary instrument room (AIR). These trip units are divided into four channels A1 and A2 and B1 and B2. Any combination of sensor inputs that meets the expression (A1+A2)x(B1+B2) will initiate RPS protective action. All of the logical combinations are accomplished at the system level and are not modified by the installation of the transmitter trip units. Each channel of trip units is housed in its own panel in the AIR (panels 9-83, 9-84, 9-85, and 9-86). Also, each channel provides input to only one channel of RPS logic which, as stated above, performs the logical combination which controls the RPS protective actions. Each channel also provides output to non-IE systems, namely the annunciator system, and the reactor recirculation pump trip circuitry. Because each channel is located in its own cabinet, and the external wiring is , ,

separated (see section 3), the separations of the RPS channels are maintained and the requirements of GDC 21, 22, 24, and Regulatory Guide 1.75 (as it applies to Browns Ferry) are met.

The transmitters and trip units have been qualified for the -

environments in which they are required to operate. The transmitters are physically-located on the local panels that the mechanical switches were removed from and on additional panels being installed at these locations; therefore, the missile design for the RPS inputs has not changed; therefore, applicable portions of GDC 2, 4, 22, and 23 are met.

Unlike the mechanical switches that the transmitter trip units are replacing, the new equipment requires electric power to operate. The dependence of the trip units and transmitters on electric power has been eliminated by making them fail safe (tripped) on loss of power as is the case with existing RPS logic. Also, note from the system

-drawing that the transmitter trip units are powered from the redundant power supplies.

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s There are no new single failures relating to power loss for the RPS.

The censequences of the loss of the MG-set power source is the same as it was before the transmitter trip unit installation, and the loss of a single trip unit cabinet power supply does not disable the trip units because it is backed up with a redundant power supply. Since there are no new power supply related failure modes, the transmitter trip units are directly replacing the existing mechanical trip switches, and since there are no system level changes, it can be demonstrated that the KPS automatic and manual systems still meet the requirements of Regulatory Guide 1.62, IEEE standard 279, section 4.17 and GDc 23 The transmitter trip units are tested from the auxiliary instrument room using built in circuitry unlike the mechanical switches. The method in which they will be tested does not require valving out the sensors, attaching actuation equipment, and actuating the sensor which is a time consuming process. This reduces the time that the RPS logic is in a degraded condition (i.e., 1 of 2)x2 logic reduced to (1 of 2) and 1. The method of testing the transmitters and trip units is discussed in the operations manual and sunnarized below:

The operation of the transmitters is verified by comparing redundant indications on the master trip units.

The operation of the trip unit and auxiliary relay at the proper setpoint is verified by using the built-in calibration unit. Note the calibration unit can only test one trip unit at a time and, when any trip unit is being tested, the cond?. tion alarms in the main control room on panel 9-5.

Following verification of proper trip unit operation, the calibration unit is returned to its normal position, and the indications on the master trip units are checked to verify that the transmitters are properly reconnected.

As noted in the above testing description, the trip units alarm in the -

MCR on panel 9-5 when they are bypassed. They also alarm on the

! following conditions:

Trip unit in test, Input signal to trip unit out-of-range (gross failure),

Trip unit out-of-file (card out),

One of two power supplies failed.

l

( In summary, the implementation of the transmitter trip units has enhanced the conformance of the RPS to the applicable NRC requirements.

The transmitter trip units have not induced any additional failure modes and have made the testing and surveillance of the RPS sensors quicker and more informative (channel is actively returned to service).

i

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9

. . 4 , '

, ' n conclusion, the additicn of the transmitter trip units to the RPS i

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me,ets the requirements of ',he ap,11 cable GDC and regulatory guides.

\s ,

s 3 0 Detailed Point By. Point Discussions S 4 A. Conformance _ to Regulatory, Guide 1.62 and section 4.17 of IEEE 279,

" Manual Initiation."

The manual initiation of t the RPS protective functions is accomplished.at the system level and is not affected by the installation of the transmitter trip unit system (refer to drawing No. 730E915 for RPS manual initiation circuitry); therefore, the requirements are met.

B. C$nformance to Regulatory Guide 1.53 and section 4.2 of IEEE 279,

" Single Failure Criteria." '

The transmitter trip units are directly replacing the mechanical switches in the RPS. A single failure of a transmitter or trip unit is ac?eptable because the RPS is a (1 of 2)x2 logic system, g

s and it would take at least two sensor failures to prevent proper RPS operation. Although the transmitter trip units require power

'.i, to operate, they are installed such that they trip on loss of

, power. Dee to the above two points, it is concluded that there are no new sinr,le fellure modes introduced that could prevent the RPS from performing its safety function; therefore, the requirements are met.

C. Conformance to Regulatory Guides 1.22 and 1.47, GDC 20 and 21, and sections 4.9, 4.10, 4;11, 4.12, 4.13, 4.14, and 4.18 of IEEE 279. ~

l ., Periodic testing of protection systems and indication of bypassed l conditi,on.

The' ope.s a bility of the trip unit and auxiliary relays is verified

, by p0riodic functional testing using special test equipment -

supplied as part of the analog trip system. Operability of the L '

transmitters is verified by periodic comparison above the lS indicators o'n'the caster trip unit: which monitors the same

, parameter- Gross transmitter "ailure is detected by special l monitoring circuits in the cualog trip units and is annunciated in the main control room. Main control room annunciation is provided l . .to indicate when a trip unit is out-of-service or is being functionally checked.

k' The transmitters and analog trip units meet the appropriate g' requireients of the referenced regulatory guides, GDC, and IEEE-Standled sections.

k C

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D. Conformance to Regulatory Guica 1.75 and Sections 4.6 and 4.22 of -

IEEE 279, " Physical Independence of Electric Systems and Identification of Divisionalized Equipment."

Each panel of transmitter trip units provides trip signals to only one channel of the RPS. It also provides signals to the non-IE annunciator and reactor recirculation pump trip system (refer to drawings 73DE320 RE, RF, and RH and 45N6206 and 47W761 series).

All utility intrapanel wiring is done in flexible conduit.

E. Conformance to GDC 29, 23, 13, 4, and 2 and IEEE 279 sections 4.3, 4.4, and 4.5. Qualification of transmitter trip units.

The transmitters and trip units have been qualified to the worst environment under which they must function; therefore, the equipment is considered to meet the referenced requirements.

F. Conformance to Regulatory Guide 1.105, " Instrument Setpoints."

Intrinsically, after random failures, electronic modules will not drift at the rate of mechanical devices (such as blind pressure switches), and significant abnormalities are indicated by the gross failure alarm feature of the trip units. The trip units are designed to receive a 4 to 20 mA transmitter signal and provide an output at a specific input signal. The modules are selected such that this requirement is met. The recommendation of Regulatory Guide 1.105 is not applicable to these devices.

G. Conformance to hegulatory Guide 1.118, " Periodic Testing of -

Electric Power and Protection Systems." . .

Regulatory Guide 1.118 is not a licensing requirement for Browns Ferry; however, since installation of the analog trip system only involves Laprovements of simple elements of the total system, no changes have been made that are inconsistent with this Regulatory Guide ~

H. Conformance to IEEE 279-1971 (sections 4.1, 4.7, 4.8, 4.15, 4.16, 4.19, 4.20, and 4.21). All other sections have been addressed in i

the preceding sections.

I l

1. Section 4.1 " Automatic Actions" l

l The function of the transmitter trip units and the RPS is the automatic initiation of protective actions; therefore, this section's requirements are met.

D

2. Section 4.7 " Control and Protection System Interaction" The RPS is used only for protective functions, and the transmitter trip units are only used for the RPS; therefore, this section does not apply to the transmitter trip units.

3. Section 4.8 " Derivation of System Inputs" The transmitter trip units directly measure the plant variables required by the RPS as discussed in section 7.2.3.6 of the FSAR; therefore, this section's requirementa are met.

4. Section 4.15 " Multiple Setooints" The RPS system does not utilize multiple setpoints for any of its plant variables under different plant operating conditions; therefore, this section d':es not apply.

5 Section 4.16 " Completion of Protective Action" The RPS system once actuated by sensor inputs must be manually reset; therefore, this section's requirement are met at the system level.

6. Section 4.19 " Identification of Protective Actionsd This is accomplished at-the system level and thus was not modified by the installation of analog trip devices

7. Section 4.20 "Information Readout" '

The trip units provide process indications in the auxiliary instrument room only and these are only used for verification of transmitter operaoility during testing; therefore, the operator is not provided with anomalous indications that could .

be misinterpreted. The only indication in the main control room is an annunciator that alerts the operator to trip system problems. These problems can be diagnosed by examining the power failure and gross failure LEDs at the trip units in the AIR. RPS syscem level status information is already implemented in the RPS system; therefore, the transmitter trip units meet the requirements of this section.

8. Section 4.21 " Repair" The trip units alert the operator to transmitter failures, and the modular design of the transmitter trip system allows for the quick swapping of backup modules into the system.

INSTRUCTIO ANU AL 4471-1 ATTACHMENT 3 Instruction Manual Operations Manual Trip / Calibration System Model 7100U l

1 Jk Rosemount

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TABLE CF CONTENTS Section Page Section Page i DESCRIPTION . . ... . .. . .. .1 Two Analog Sig ..;. . . . . 22

~

Introduction . . . . . ... .. 1 Input / Output Capabilities . . 23 Application. . . .. .. ... .. 1 Calibration . .. . . . 23 System Units // ser. . S .. .... .1 Master Trip Unit (RTD inr/it) . 23 Card File . . .. . . .. .. .2 Calibration . ... . . 23 Master Trip Units (4-20 mA Input Slave Trip Unit . . . . . 25 and RTD input) . .. . .. . 2 Input / Output Capabilities . . . . 25 Slave Trip Units . .. . .. . . 2 Calibration . . . 25 Calibration Unit . . .. . 3 Calibration Unit. . . ... 27 Read?ut Assembly . . . 3 Stable Current Operation . . 27 Transient Current Operation. . .. . 27 11 SPECIFICATIONS.. . . . . 5 Calibration Select and Command Switch. 27 Introduction . ... . . . 5 Calibration Status LED and Signal . . 27 710DU System Specifications . . 5 Test Jacks . . 27 Electrical Specifications . 6 Readout Assembly . . 28 Accompanying instrumentation . 7 Pulses Produced. . . . 28 Environmental Specifications. . .7 1 rip Status Signal . .. . 28 Card File Scecifications . . .,.. 8 Transient Blanking Signal . . 28 General . .. .. . . .. .. . . 8 Mechanical Specifications . .. . 8 V WIRING AND INSTALLATION .. . , . 29 Electrical Specifications . . , 8 General. . . . . 29 Master Trip Unit Specifications . . . . 8 W ring . . . .. 29 General . . . . . . . . 8 Card File . . . . . 29 Mechanical Specifications . . .. 8 Customer Wiring . . . 32 Electrical Specifications . . . . 8 Readout Assembly Interface. 32 Performance Specifications . . .. 9 insta:labon . . . . . . . 32 Slave Trip Unit Specifications . . .. . 10 Card File . .. 32 General . . .. . . 10 Master and Slave Trip U.iits . . . 32 M?chanical Specificationc . . 10 Caiibration Unit . . . . 34 Electrical Specifications . 10 Readout Assembly . . . 34 Performance Specifications . 10 Cafibration Unit Specifications . . 11 VI CAllBRATION AND OPERATION . . 35 General . . . . .. . jj Generaf. . . .. . 35 Electrical Specifications . .. 11 Calibration . . . . .. . 35 Readout Assembly Specifications . . . 12 Assembly Area. . . . 35 General . .. .. . .. . 12 Final Operating Area . . . 35 Electrical Specifications . . . . 12 Calibration of Master Trip Units Perforrr ance Specifications . . 12 (4-20 mA Input) . . . . . . 36 Calibration of Master Trip Units 111 ADJUSTMENTS AND DISPLAYS 13 (RTD input) . . . . . . 37 introduction . . . . . 13 Calibration of Slave Trip Unit;, . .. . 38 Cahabon of Readout AssemMy . . 38 IV THEORY OF OPERATION. . . 19 Operadon . .. . .. %

Introduction . , . .. 19 7100U System . . 19 Vil ACCESSORY HARDWARE . 41 Master and Slave Trip Unit Operation 19 General. 41 Calitsration Unit and Readou! Assembly . . . .

Blank Panels . 41 Operation . ... . . . 20 710DU Card Extenders . . 41 Card File . . . . .. .. . 20 .

Master Trip Unit (4-20 mA input). . 20 Trip Unit and Calibration Unit Card Analog Meter . . . . . 21 Extenders . .. . 41 Trip Output . . . . 21 Readout Assembly Card Extender. 43 Trip Status Output. . . . 22 Gross Failure Output . 22 Vill GLOSSARY. . 44 i

s e

LIST OF TABLES Table - . Title Page 1 710DU Dimensions . . . . . . . . . . .. .... ....... ...... .... ... .. . ..... . 5

'2 710D0 Weight. . .. ... .... .. ......... ..... .... .. . .... . .. 5 3 \ / 7es Available for Transmitter Operation . . . . . . . . . . . . . . . . . . . . . . . .. 6 4 Ccp . Wire. DC Resistance . . . . . . . . . . . ...... ... . . . .7 5 Environmental Conditions . . . . . . . . . . . . . . ... .. . .... .. . .. 7 6 Analog Output Accuracy - Master Trip Unit. ... . .. .... .... .. ... 9 7 Trip Point Repeatability - Master Trip Unit. . . .. .. . .. . . . . 10 8 Trip Point Repeatability - Slave Trip Unit . . ...... .. . 10 9 Adjustments and Displays - 710D0 Master and Slave Trip Units . . . .. 15 10 - Adjustments and Displays - 710DU Cahbration Unit . .... .. . .. . 17 L 11 Adjustments and Displays - 710DU Readout Assembly .. .. . . .. . 18 12 Carc File Terminal Assignments - Master and Slave Trip Units . . .. ... . .. 30

=13 Card File Terminal Assignments - Cahbration Unit . .. . . .... .. . . 31 14 Mating Connector Pin Designations - Readout Assembly . ... ........ . .. 32 15 Card Extender Dimer'sions . . . . . . . .. .... .. ...... .. 41 LIST OF ILLUSTRATIONS Figure Title Page 1 Typical 7100U Trip / Calibration System . ... ,. .... . .... . . . 1 2 710DU Master Trip Unit . . . . .... .. . . . . 2 3 710DU Slave Trip Unit. .. . . . .. . . ... 3 4 71000 Calibration Unit. . ..... .... .. .. . .... . .. . 3

.5 710DU Readout Assembly . .. .. . . ... ....... . . .. . .. 4 s 6- Master Trip Unit - Front Panel Adjustments and Displays . . . . .. .. .. 13 7 Slave Trip Unit - Front Panel Adjustments and Displays. .. . . .. .. 13 8 Master (4 20 mA input) and Slave Trip Units - Printed Circuit Board Adjustments . . 14 9 Master Trip Unit (RTD Input) Printed Circuit Board Adjustments . ..............16 10 Calibration Unit - Adjustments and Displays . .. .. .. . . ........... .. . 17 11 Readout Assembly- Adjustments and Displays .. . ...... .. ... . . .. . 18 12 7100U Trip / Calibration System Functional Block Diagram . ... .... . ... .. 19 13 Master Trip Unit (4 20 mA input) Functional Block Diagram ........ . .. . . ... 21 14' Trip Output - Normal Logic . . .. .. . . ... . .. 21 15 Trip Output - Reversed Logic . . . . . . . ... . . . . 22 16 - Trip Status LED - Normal Logic ... . .. . ... . . . .. . .. 22 17 Trip Status LED - Reversed Logic . . . . . .. . .. . . . . 22 18 Gross Failure Output Limits . . . . .... .... . . . ... ...... . .. 22 19 Master Trip Unit (RTD input) Functional Block Diagram . . .. . . .. 24

' 20 Adjustment Range of RTD Input . . . ... . .. . .. 24 21 Slave Trip Unit Functional Block Diagram . . . .. . . 26 22 Calibration Unit Functional Block Diagram . .. . 26 23 Readout Assembly Functional Block Diagram... ... . ... .. .. . . 28 24 Wired 710DU Card File . . . . . . ....... . . ... .. . ..... . . 29 25 Sample Appfication of 710DU System with Pressure Transmitters . . . .. .. 33 26 Sample Transmitter and Master Trip Unit Interconnection Diagram.. . . . . 33 27 Retrofit of an Existing Power Plant with the 710DU Trip /Cahbration System . . . . . . 34 28 High Side and Low Side of Reset Differential . .. . .. . ... 37 29 Decade Box Connection .... . .. . ...... ... . .. .. .. . 37 30 Application of 710DU Trip Unit Card Extender . . . . .. . 41 31 Application of 710DU Calibration Unit Card Extender . .. . .. . . 42 32 Application of 710DU Readout Assembly Card Extender . . . . . . 42 is

L 9

SECTION I DESCRIPTION INTRODUCTION um refineries, chemical plants, or industries which utilize

- either 4 to 20 mA transmitters or 3-wire platinum HTD's This manual contains cc ~' ate operating instructions and require trip outputs.

for the Model 710DU l 'ip/c pration Syster, manufac-tured by Rosemount Inc., Minneapolis, Minnesota. Main. SYSTEM UNITS / ASSEMBLIES tenance and repair procedures for the 7100U including troubleshooting. disassembly, and an illustrated parts The 710DU Trip / Calibration System consists of-breakdown, are conta.ned in Service Manual 4471-2.

Bench Test Facility Manual 4471-3 includes complete 1. Card File 710DU bench testing information.

2. Master Trip Units using 4-20 mA Input APPLICATION 3 Master Trip Units using RTD Input The 710DU Tnp, Calibration System is a multichannel 4. Slave Top Units signal conditioning system with a built-in calibration capability. It provides accurate, easily-calibrated trip 5. Calibration Units output signals for processes (pressure, temperature, level, etc.) which are monitored by 4 to 20 mA trans- 6. Readout Assembly mitters or 3-wire platinum RTD's. The trip output signals dove external relays or loads of up to one amp at 24 V. 7. Accessory Hardware (includes card extenders and An auxiliary analog output can be used to drive external blank panels; see " Accessory Hardware" section of recording and monitoring equipment, while a second this manual).

analog output can drive other channels in the 710DU System to provide additional trip points for a single input Wnen ordering a Tnp/ Calibration System, the customer sensor, can select whichever units or assemblies are required for his particular application. A typical 710DU System is The 710DU Trip / Calibration System is designed spe- shown in Figure 1.

c.fically for use in nuclear power generating stations. It is qualified to IEEE STD 323-1974 and IEEE STD 344-1975 Brief, functional descriptions of each unit / assembly in per Rosemount Report D8200037. Other applications the Trip / Calibration System follow. Refer to the " Theory include fossil-fueled power generating stations, petrole- of Operation" section for more detailed information.

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, .v s Figure 1. Typical 710DU Tnp/Cahbration System.

1 l

Card Fils One analog output is used to drive up *o seven Slave Tnp Unsts, thereby estabbshing as many as eight inp points All units in the 710DU System except the Readout (one for Master, seven for Slaves) for a single input Assembly plug into the electrical connections at the rear signal. The second analog voltage, designated the aux-of the Card File. Any combination of Master and Slave ihary analog output. is used to drive externai recording or Trip Units and blank paneis can be inserted in the first 12 monitonng equipment. s file locations (left to richt as viewed from front of Card File); the Calibratico U r ,1ssigned to location 13 (far Master Trip Units have a trip point adjustment potenti-right). The Readout Asserniy pugs into the Calibration ometer on the front panel, as well as an analog meter Unit. displaying the input signal, two light-emitting diodes (LED's) indicating trip and gross failure conditions, a The Card File is wired with all interconnecting wires be- gross failure reset button, and test jacks to monitor the tween the Calibration Unit and the Master and Slave input signal and the auxiliary analog output signa l.

Trip Units installed. The Card File mounts in a standard 19-inch relay rack. See the " Wiring and Installation

• sec- The circuit board of a Master Trip Unit includes adjust-ton. for rnounting instructions and for a photo of a wired ments for high and low gross failure levels, tnp reset Card File. differential, trip output logic, and tnp status LED logic. In addition, a 4-20mA Input Trip Unit hcs an adjustment for the frequency response of the auxiliary analog output Master Trip Uruts signal.

One Master Tnp Unit is required for each 4 to 20 mA The circuit board of a Master Trip Unit with RTD Input transmitter or 3-wire RTD. The Master Trip Unit pro-a e a e m, gam duces a trip output signal when the input signal passes through a preret tnp point, and a gross failure signal when the input signal is outside preset high or low limits.

Refer to Section til of this manual for descnptions of the vari us adjustments and displays included on Master In addition to trip and gross failure outputs, the Master Trip Units.

Tnp Unit also produces two buffered analog output voltages proportional to the input signal.

A Master Trip Unit is shown in Figure 2.

v Slave Trip Units Each Slave Tnp Unit in the 710DU System is dnven by a Master Tnp Unit, and adds one additionas tnp point and gross failure circuit to each sensor channel. The Slave Top Unit receives a buffered 0 to 10 Vac (0-100%) signal (cahbrated from 1 to 5 Vdc) proportional to

( the input signal from a Master Tnp Unit. The Slave Tnp PrIke F Unit produces a tnp output signal when the input signal ii~'

fb b

passes through a preset inp point, and a gross failure signal when the input signal is outside preset nigh or low h hmits.

The front panel of each Slave Trip Unit includes a trip

- point adjustment potentiometer, LED's indicating trip and gross failure outputs, a gror fd!== reset button, and a test jack to measure the input signal from the Master Tnp

Unit. Adjustments for high and low gross 'ailure levels, tnp reset differential, trip output logic, and trip status output / LED logic are contained on the Slave Unit's circuit board (see Section III).

i i Slave Trip Units are never directly connected to any external signal source, and do nn* seneida analog output signals.

J Fogure 2. 710DU Master Trtp Untt The Slave Tnp Unit is shown s , Figure 3.

2 4

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l .

Calibration Unit l All Master and Slave Trip Units in the 710DU System can be checked or adjusted in place (in the Card File) by the l Calibration Unit, which produces a calibrate command I g l signal, calibration current, and a calibration status signal.

Figure 4 shows the Calibration Unit.

?

Ain-Calibration of any channel (Master or Slave Trip Unit)is initiated by the calibrate command signal from the Cali-bration Unit to a Master Trip Unit. The signal enables the M Master Trip Unit to accept calibration current in place of d* the input signal and causes the Master Trip Unit gross failure output to generate a high (+24 Vdc) output signal.

0 j.-p., The calibration current supplied by the Calibration Unit is made up of independently adjustable stable and

$ transient current sources. The stable current is used to

]. .)

verify or adjust trip points on any of the 12 channels (Trip K y.

Units) in the Card File, and to check analog signals of Master Trip Units. The transient current is added to or subtracted from the stable current (depending on the logic selected) to provide a step current for checking time response characteristics of the Trip / Calibration System, equipment driven by the 710DU, or verifying high/ low gross failure set points. The 24 Vdc calibration stMua signal generated by the Calibration Unit can be Figure 3. 7TODU Slave Trip Unit- used for remote display / indication.

A two-part selector switch on the front panel of the Calibration Unit is used to (1) select the Master or Slave Tnp Unit whose trip point is to be verified or calibrated; (2) route the calibration current to the appropriate Master Trip Unit; and,(3) activate the calibrate command signal.

The front panel also includes an on/off power switch, transient current polarity switch, stable current amplitude adjustment, transient current amp!itude adjustment /on off switch, and a calibration status LED. Three test jacks provide access to the transient tngger signal, signal return, and trip status signal.

The Calibration Unit provides both a mechanical support and an electrical connection for the Readout Assembly via a spring-loaded door.

Readout Ass:mbly W

W- The Readout Assemb:y (Ficure 5) is a portable rrea-surement and display device which is inserted iri tne front of the Calibration Unit, and can be transferred to any other Calibration Unit in the 7100U Tnp/ Calibration j System.

The Readout Assembly contains two four-digit displays l which measure and display calibration currents with a j 0.01 mA resolution. The lower display, designated the cal.Dration current display, continuously shows the total i Figure 4. 710DU Cahbr'; tion Unit. cal;bration current generated by the Calibration Unit.

l 3

The upper display, designated the trip current display, l

tracks the stable calibration current snown on the lower " '

display until the trip output of the Master or Slave Trip _

Unit being cebrated changes state The calibration _

p' current reading at that point is latched on the trip current s

disp!;y by the trip status signal from the Master or Slave  ;

Trip Unit. The trip curr. ' display is blanked when tran-i sient current is ene litta /

- l A trip status LED on the front of the Reacout Assembly .

r indicates when the trip current display is latched. A trip current display reset button reverses the latching logic for the trip current display and trip status LED so trip current can be read for reversed trip status logic.

The zero adjustment ar:d span adjustment of the Readout Assembly can be made via potentiometers located near the rear of the unit (see Figure 11).

' Figure S. 710DU Roadout Assembly.

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SECTION 11 SPECIFICATIONS INTRODUCTION This section of the manut mtains operating specifica- well as for each unit / assembly inauded in the System.

tions for the 710DU Tr 3/C: ' ' ntion System. Mechanical, For unique characteristics of any particular 710DU Sys-tiectrical, environmental, and performance specifica- tem, refer to the applicable Rosemount Specification tions are detailed for the complete 7'CDU System, as Control Drawing.

710DU SYSTEM SPECIFICATIONS DIMENSIONS: See Table 1.

WEIGHT: See Table 2.-

TABLE 1 710DU DIMENSIONS Height Width Depth Unit / Assembly Inches Centimeters Inches Centimeters Inches Centimeters Card File 6-31/32 17.70 19 48.26 11 27.94 Master Trip Units 6-31/32 17.70 1-3/16 3.02 9-7/8 25.08 Slave Trip Unit 6-31/32 17.70 1-3/16 3.02 9-7/8 25.08 Calibration Unit 6-31/32 17.70 2-5/16 5.87 10 25.40 Readout Assembly 2-5/8- 6.67 2 -

5 08 7-1/2 19.05 TABLE 2 710DU WEIGHT Kilo-Urit/ Assembly Pounds grams Card File 6.69 3.04 Master Trip Unit with RTD input 1.13 .51 Master Trip Unit with 4 20 mA Input 1.19 .54 Slave Trip Unit .75 .34 Calibration Unit 2.50 1.14 I

Readout Assembly 1.56 .71 5

MOUNTING: Electrical Specificiti ns Card File: The Card File fits in a standard 19-inch POWER SUPPLY VOLTAGE REQUIREMENTS:

relay rack and includes provisions for installing a tamper-proof bar over the se*mnt adjustments on the 22.0 to 28.0 Vdc.

Master and Slave Trip Units. v WARNING File Assignment 7 Moa and Slave Trip Units mount in Card File loca; ions i through 12 (left to right as Extreme caution should be exercised when operating viewed from front of Card File), the Calibratior, Unit in at low power supply voltages. Some transmitters may location 13 (far right). NOTE: Trip Units cannot be require more vcltage for proper operation at severe inserted in location 13, and the Calibration Unit can- low or high temperature conditions. If these condi-not be inserted in locations 1 through 12. tions exist when transmater lead resistance is at the maximum value allowed and the trar' mitter is at a Mechanical Support: maximum current operating point (20 mA),the result-TRIP AND CALIBRATION UNITS: Each Master, ing low voltage available at the transmitter may cause Slave, or Calibration Unit is secured in the Card it to operate improperly, and a desired trip mai not File by two captive screws, top and bottom printed occur. See Table 3 for voltages available for transmit-circuit board guides, ard a rear edge card con- ter operation.

nector(s). (See Card File specifications, and the

" Wiring and installation" secu an of this manual for CURRENT DRAIN (worst case exclusive of output loads):

detailed mounting instructions, and for terminal Master Trip Units:(4-20 mA Input & RTD input) 260 assignments for edge card connectors.) mA, including 20mA transmitter current.

READOUT ASSEMBLY; The Readout Assembly ave n 225 mA plugs into the Calibration Unit through a spring-loaded door. Electrical connection is made through

• * " " *^'

a blind mated DA-15 connector pair, es u Assem y: 5 mA.

INSTRUMENT PANEL FINISH:

A!! instrument panel fronts are black lusterless polyure- v thane paint (American Coatings and Chemicals No. nal for each t@ ou$ut aM gross faHure n

37038) with white lettering.

output; 12 Vdc nominal for each tHp status output; CIRCUlf BOARD MARKING:

24 Vdc nominal calibration status signal for remote Components. adjustment positions, and terminals on indication; all printed circuit boards are identified by silk- 1 to 5 Vdc analog signals proportional to screening or photoetching. input signal.

TABLE 3 VOLTAGES AVAILABLE FOR TRANSMITTER OPERATION Maximum Traesmitter Lead Resistance Maximum Lead Length for 20 mA Ope ating Point, and Trans- for Size 16 AWG Power Supply Voltage Available at Terminals mitter Requiring 15.0 Vdc to Operate Copper Wire at 20*C*

Voltage 14 and 15 of Card File (Ohms) (Feet) 22.0 15.32 16 3.820 23.0 16.32 M 15.700 17.32 116 27,700 24.0 18.32 166 39,700 25.0 19.32 216 51,600 ,.-

26.0

• See Table 4 for maximum dc resistance of copper wire for various AWG sizes.

6

TABLE 4 INPUT SENS2HS:

COPPER WIRE, DC RESISTANCE Transmitters: Two-wire or 4-wire,4-20mA transrnit-(Per ASTM Specification B1-56) ters are required, and should be purchased by the customer acurding to particular requirements. Rose-DC Resistance at 200C mount's line of Model 1152 and 1153 Pressure Trans-AWG Size Ma)' mum Ohms per 1,000 Feet mitters are qualified for use in Nuclear Power Gener-8 _

0.824 ating Stations.

10 1.04 12 1.65 Resistance Temperature Detectors (RTD's): Shielded, 14 2.63 3-wire. platinum RTO's with Ro = 100 ohms are re-16 4.18 quired and should be purchased by the customer ac-18 6.64 cording to particular requirements.

20 10.50 CABINET:

TRIP OUTPUT LOGIC: A standard 19-inch rack for housing the 710DU Sys-tem, power supplies, and relays should be supplied Normal trip outyt logic provides a 24 Vdc output by the customer. Location of the cabinet at the custom-when input signal is greater than the tnp point. Re- er site should be such that the resistance of the wire versed inp output logic provides a 24 Vdc output used to make connections between the 7100U Sys-when input signal is less than the inp point. Tnp tem and the transmitters does not exceed 16 ohms.

output logic is indicated by NORM and REV at the trip This assures a minimum turn-on voltage for the output logic switch on the printed circuit board (Fig- transmitters of 15.0 Vdc when the power supply is at a ure 8). minimum value of 22.0 Vdc.

TRIP STATUS LED LOGIC: Environmental Specifications Normalinp status logic provides a 12 Vdc output and ENVIRONMENTAL CONDITIONS: See Table 5.

trip status LED on when trip output is 24 Vdc. Re-versed trip status logic provides a 12 Vdc output and SEISMIC VIBRATION:

trip status LED on when trip output is 0 Vdc.. Trip status logic is indicated by NORM and REV at the trip The Card File, Master Trip Units, and Slave Trip Units status LED logic switch on the printed circuit board operrJe during and after exposure to seismic vibra-(Figure 8). tion with a ZPA of 1.17 g OBE and 1.75 g SSE. See Rosemount Report D8200037.

Accompanying Instrumentation ELECTROMAGNETIC SUSCEPTIBILITY:

RELAYS:

The 710DU operates in EMI conditions norrully Relays should be selected and supplied by the cus- expected in a power plant control room environment, tomer in accordance with specific environmental provided that shielded wires are used for all signal requirements. connections and the auxiliary analog output.

TABLE 5 ENVIRONMENTAL CONDITIONS Operating Condition Normal Transent Accident (includes Margin) 160 for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 185* for 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />

• F 60 to 90 once per year 150* for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> Ternperatur 71 for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 85* for 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />

• C 15 to 32 once per yoar 65.6* for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> Relative 90% for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 90% for 14 hours1.62037e-4 days <br />0.00389 hours <br />2.314815e-5 weeks <br />5.327e-6 months <br /> Humidity 40 to 50*6 once per year Radiation 510 5Rad (air) TID over 20 years 2 x 105 Rad (air) TID in 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> Pnwer Supply 22 to 28 VJc 7

CARD FILE SPECIFICATIONS General card connector with gold-plated contacts. External The following specifications apply to the 710DU Card connections (power supply, relays. recording equip-File. ment, etc.) are made to the connector with 6-32 x ,

%-inch cadmium-plated, steel screws. Each connec-Mechanical Specific ation tor has a dielectric strength of 1500 volts, while each terminal has a maximum rating of 5 amps.

CONSTRUCTION:

CALIBRATION UNIT CONNECTIONS:

The Card File is constructed to mount in a standard 19-inch relay rack, Mechanical support for Master Card File connections to the Calibration Unit are Tnp Units. Slave Trip Units, and a Calibration Unit is made through both single-sided and double-sided provided by alumirium cross members Printed circuit edge card connectors. Both connectors have a di-board guides are attached to the cross members to electnc strength of 1500 volts, and a maximum rating ensure proper alignment between the Card File con- of 5 amps for each terminal.

nector and the Master or Slave Top Unit instelled; or, in the case of the Calibration Unit, between the two CARD FILE WIRING:

Card File connectors and the Calibration Unit.

Power bus bars are used to make connections across Electrical Specifications terminals 1 and 2 (see Rosemount Specification Con-trol Drawing for details). Connections between termi-TRIP UNIT CONNECTIONS: nals 5, 6 and 7 are made using stranded, sihcone rubber-insulated, tin-coated, copper conductors. (A The Card File provides an electrical connection for a Card File is shown in Figure 24. More details are in-Master or Siave Trip Unit through a sing!e-sided edge cluded in the "Winng and Installation" sectiort.)

MASTER TRIP UNIT SPECIFICATIONS v

General less than 100 mA. A short circuit condition (terminals of transmitter shorted to ground or together) may per-The following specifications appiy to all Master Trip sist indefinitely with no damage to the Master Trip Units in the 710DU Trip / Calibration Lystem. Unit.

Mechanical Specifications input Signal Test Jack (4 20 mA): Test jack J1 on the Master Trip Unit's front panel monitors transmitter CONSTRUCTION: current to the Master Tnp Unit. Input current is fed through a 250 ohm precision re!.stor to generate a The Master Tnp Unit can tse removed from the Card 1 5 Vdc signal at this jack.

File or reinserted when power is applied without dam-age to any electronic components. RTD Signal: A shielded. 3-wire, platinum RTD with Ro = 100 ohms is required for proper operation of METER: the RTD input Master Tnp Unit. The RTD leads may be shorted to ground or togemer with no damage to

! The customer must specify required meter labeling the Master Tnp Unit.

and scaling.

Input Signal Test Jack (RTD input): Test lack J1 on Electrical Specifications the RTO Input Master Tnp Unit's front panel monitors the buffered bridge output. This signalis 1-5 Vdc pro-INPUT INTERFACE: portional to the resistance of the RTD when the zero, span, and lineanty adjustments are set to the required Transmitter Signal: A 4-20 mA transmitter signal is values for the temperature range being monitored.

required for proper operation of the 4-20 mA Input Master Trip Unit. Total transmitter loop resistance TRIP OUTPUT AND GROSS FAfLURE OUTPUT:

exclusive of transmitter and leadwires is 330 ohms (nominal). The transmitter loop is current limited to Each output is +24 Wc nominal for logic level 1 and 8

l ss than +1 Vdc for logic level 0. Eithtr output is ca- affectrd by-pable of driving a resistive load of 24 ohms and up,or an inductiva load of up to 4 Henries. Two or more trip 1. Output shorted to power supply return or chassis outputs or gross failure outputs can drive the same ground; load.

2. Output shorted to +24 Vdc (Master Trip Unit power ANALOG OUTPUTS: supply);

Two analog signals are provided by Master Trip Units. 3. Output shorted to +125 Vdc; One signal drives S! ave Trip Units. The analog volt-age level for this output is factory-adjusted to meet 4. Output shorted to +115 Vac; the requirements of the Slave Trip Unit input. The second (auxiliary) anatog signal is for resistive loads 5. Output disconnectec: from the load.

Such as recorders, meters, or controllers. The auxil-iary analog output voltage level is 1 to 5 Vdc. The M ASTER TRIP UNIT / CAllBRATION UNIT INTERF ACE:

frequency response of the auxilMry analog output can be adjusted to provide a break frequency between 0 8 The following signal interfaces are used only when and 8 0 Hz on 4 to 20 mA Input Master Trip Units, only. the Master Trip Unit is being calibrated:

1. Calibration Current: 0 to 41 mA current generated ANALOG OUTPUT TO SLAVE TRIP UNITS:

in the Calibration Unit which is used to chsck func-Load: Up to seven Slave Trip Units can be driven by tions or perbrm calibration of the Master Trip Unit.

the analog signal from a single Master Trip Unit with-out affecting the performance of the Master Trip Unit. 2. Calibrate Command: 24 Vdc signal from the Cali-bration Urut to the Master Trip Unit which actuates Voltage Range: Analog output is 0 to 10 Vdc corre- a OPDT relay to substitute calibration current for sponding to a current input of 0 to 40 mA. The cali- the input sigrat. Calibrate command aisc causes brated range, over which the accuracies of Table 6 the gross failure output on the Master Trip Unit to indicate that it is inoperative during calibration.

apply, is 1 to 5 Vdc corresponding tu a 4 to 20 mA transmitter input, or 4100% of span for RTD input Trip Units. 3. Trip Status Signal: 0 to 12 Vdc nominallogic signal from the Master Trip Unit to the Calibration Unit Frequency Response: The analog signal to Slave Trip which changes state with the trip output signal.

Units has a second order break frequency at 250 HL The trip status signal latches the tnp current das, play on the Readout Assembly at the trip point of the Master Trip Unit.

AUXILIARY ANALOG OUTPUT:

TABLE G Load: The auxiliary analog output signalis capable of driving resistive loads from 1.500 ohrra, and up. ANALOG OUTPUT ACCURACY Master Trip Unit Voltage Range: Analog output is O to to Vdc corre.

sponding to a 0 to 40 mA current input. The calibr9ed " "E ^ " # '"9 "'E"I range, over which the accuracies of Table 6 apply,is Condition Accuracy 1 to 5 Vdc corresponding to a transmitter input of 4 to 20 mA or 0 to 100% of span for RTD input Master Trip tuormal 0.15% (60' to 90 F) 2 0.35%/100- F Units.

Frequency Respense: (4-20 mA Input option only): Performance Specifications Auxiliary analog output frequency response is deter-mined by a second order break filter adjustable from ANALOG OUTPUT ACCURACY:

0.8 to 8.0 HL The accuracy of both analog outputs is shown in Table 6. Output ac:uracy is defsnM as an allowable Output Signal Test Jack: Test jack J2 on the Master deviation (percent of span) from the ideal input-output Tnp Unit's front panel is used to monitor the auxiliary functiort Requiremer ts are specified for normal oper-analog output signal.

ating conditions (see Table 5). The analog output input Output isolation: Auxiliary analog output is iso- accuracy requirements listed are valid for up to six land to the extent that trip function accuracy is not months e ; operatiort 9

TRIP POINT REPEATAllLITY: TABLE 7 See Table 7. Repeatability is based on an input signal TRIP POINT PEPEATABILITY of 4 to 20 mA (equivalent to 10 to 50% of span), or Master Trip Units equivalent RTO resistance. (See Table 5 for definition of plant operating conditions ) Ti e trip point repeata- Operating Trip Output -

bility requirements lis'ad are valid for up to six months Condition Repeatability of operation.

4-20 mA Input Normal 2 0.13% (60* to 90'F) 10.20%100"F RTD inout Normal 2 0.75% (60* to 90"F) z 1.5W100'F 4-20 mA Input Accident 1 0.40%

RTD input

• Accident 22.0%

SLAVE TRIP UNIT SPECIFICATIONS General Unit is being calibrated is:

The fol!; wing specifications apply to all Slave Trip Units  ! Trip Status Signal: 0 to 12 Vdc nominallogic signal in the 7100U Trip / Calibration System. from the Slave Trip Unit to the Cahbration Unit which changes state with the trip output signal.

Mechanical Specifications The trip status signal latches the trip current dis-play on the Readout Assembly at the trip point of CONSTRUCTION: the Slave Trip Unit.

v The Slave Trip Unit can be removed from the Card Performance Specifications File or reinserted when Power is applied. without damage to any electronic components. TRIP POINT REPEATABILITY:

Electrical Specifications See Table 8. Repeatability is based on a 4 to 20 mA input signal (equivalent to O to 100% of span). Perfor.

MASli:Fi TRIP UNIT INTERFACE: mance is specified for normal and accident plant operating conditions (see Table 5). The trip point re-Slave Tnp Units are driven by a O to 10 Vdc analog peatabihty requirements leted are valid for up to six s;gnal (calibrated from 1 to 5 Vdc) from a Master Trip months of operation when dnven by a properly func-Unit. This signal is monitored by Test Jack J1 on the lion.ng Master Tnp Unit.

I front panel of the Slave Trip Unit. Up to seven Slave Trip Units may be connected to a single analog to-Slave signal.

TRIP OUTPUT AND GROSS FAILURE OUIPul: TABLE 8 Each output is +24 Vdc nominal for logic level 1 and TRIP POINT REPEATABILfTY less than +1 Vdr: for logic level 0. EPher output is Slave Trip Unit

- capable of dnving a resistive load from 24 ohms and Operating Trip Output up, or an indu tive load of up to 4 Henries. Two or Condition Repeatability more trip outputs or gross failure outputs can drive e sa e ad Normal !0.20% (60* to 90 F) !0.35%/100'F SLAVE TRIP UNIT / CALIBRATION UNIT INTERFACE: 0.60 %

Accident v

{ The only acthe interface signal when the Slave Trip 10

CALIBRATIEN UNIT SPECIFICATlHNS General 4. Calibrate Command: Calibrate command is a 24 Vdc signal to a Master Trip Unit which actuates a The following specifications apply to the 710DU Calibra- DPDT relay to substitute calibrat on current for the tion Unit. input signal.

Electrical Specifications 5. Trip Status Signal: The Calibration Unit receives a trip status signal (12 Vdc for logic level 1 and 0 Vdc TRIP UNIT INTERFACE: for logic level 0) from the Master or Slave Trip Unit being calibrated. The signal latches the trip current

1. Stable Calibration Current: The Calibration Unit display on the Readout Assembly at the trip point produces a stable, independently adjustable cur- of the Master or Slave Trip Unit.

rent which is used to calibrate Master or Slave Trip Unit tnp ooints, or venfy analog outputs. 6. Calibration Status Signal: When energized, the Calibration Unit produces a 24 Vdc signal capable STABLE CAllBRATION RANGE: 3.5 to 20.5 mA. of driving a resistive load of 75 ohms and up, and an inductive load of up to 0.8 Henries. The signal RAMP RATE: Maximum rate of change of stable provides for remote status indication that a Trip calibration current is 1.0 t 0.1 mA per seconi Unit is being calibrated.

STABILITY: Once set, stable calibration current 7. Transient Blarking Signal:When transient calibra-will not vary more than t 5 microamps for normal tion current is activated, the transient blanking sig-operating conditions. nal blanks the trip current display on the Readout Assembly.

2. Transient Calibration Current: The Calfbration Unit produces an independently adjustable Wp READOUT ASSEMBLY CGNNECTIONS:

(transient) current which is added to, or subtracted from the stable current. Transient current may be Signals provided at the Readout Assembly connector uwo to check response time of Master and Slave are:

Trp Units or external equipment driven by the 7100U System, and also to venfy gross fail points. 1. Chassis ground, TRANSIENT CALIBRATION CURRENT RANGE: 2. +24 Vdc power 0.5 to 20.5 mA. Addition or subtraction is deter-mined by a switch on the Calibration Unit's front 3. Display engaged, panel labeled Polanty.

4. +24 Vdc power return, RISE AND FALL TIME: The rise and fall time of transient calibration currert in respor.se to the 5. Calibration current return, transient current amplitude adjustment or transient polarity switch is less than 100 microseconds 6. Calibration current, between 10 ard 90% or 90 and 10% of final value.

7. Trip status output.

STABILITY: Once set, transient calibration current will not vary more than +50 microamps for normal 8. Transient blanking plant operating arid environmental conditions.

TEST JACKS: '

3. Calibration Current: Calibration current is the total current (0 to 41 m4) routed to a Master Trip Unit Three test jacks on the Calibration Unit's front panel Calibration current can be (i) stable calibration access the: I current only, or (2) stable current added to tran-sient calibration current, or (3) the difference be- 1. Transient trigger signal (J1),

tecen stable and transient currents. If the transient current is used as a negative value it cannot force 2. Signal return (J2),

the sum of the transient and stable currents to a value less than 0 0 mA. 3. Trip status signal (J3).

11

)

G READOUT AS! EMILY SPECIFICATION 3 General i

The following specifications apply to the 710DU Read- 4. Display Engaged: This return signal for a relay out Assembly. drive circuit in the Calibration Unit causes the cali-bration current to be routed to the Readout Electrical Specifications Assembly.

CALIBRATION UNIT CONNECTIONS: 5. Transient Blanking: This logic level is tied to tha transient current switch on the Calibration Unit.

The following signals, plus power, power return, and and causes the trip current display to be blanked chassis ground comprise the connections: when transient current is activated.

1. Calibration Current: The total calibration current Performance Specifications generated by the Calibration Unit is brought into the Readout Assembly for measurement and RESOLUTION:

display.

The Readout Assembly will measure and display cali-

2. Calibration current return. bration current with a 0 01 mA resolution during nor-mal operating conditions. The operating temperature

3. Trip Status: The signal from the Master or Slave range of the Readout Assembly is 40 to 104*F (4.44 to Trip Unit being calibrated for trip point setting is 40.00*C).

brought to the Readout Assembly and used to latch the trip current display.

5 V

M 12

s SECTION lli ADJUSTMENTS AND DISPLAYS INTRODUCTION Tables 9,10. and 11 cc-tain functional descriptions of Trip / Calibration System. Figures 6, 7. 8. 9,10, and 11 the front panel and pontus i, uit board adjustments and show the locations of all items included in the tables.

displays required foi proper operation of the 710DU d

s  !

9 6 GRDSS F ArLURE LED GROSS F AILURE RESET h METER

/9 TR$ STATUS LED rRIP POINT ADJUSTVt N T TEST J ACK JT 'O TEST J ACp, J2 O Figure C. Master Trip Unit - Front Panel Adjustments and Displays s  !

GROSS F AILURE LED '

GROSS F AILURE RESET h 9

TRIP STATUS LED h TRtp POINT ADJUSTUENT-TESTJACKJ1 Figure 7. Slave Trip Unit - Front Panel Adjustments and Displays.

13

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14

o TABLE 9 AD.tUSTMENTS AND DISPLAYS 7100U Master and Slave Trip Units Included On:

Adjustmentt 4-20 mA RfD input Display Master Trip Asaater Trip slave Trip Location Function Reset Yes Yes Yes Cucust Card Assy Single turn potentiometer provides Dette entw g (Figure 8) for adgusting the reset ditterential from a mmietum of 0 5% to a ananimum of 7 5% of the mput span f requency Yes No No Cacust Card Assy Smgte-turn potentiometer is used to Response (Figure 8) adt ust break frequency (0 8 to 8 0 Hz)

Adi ustment* of ausdiary analog output segnal Low Gross Yes Yes Yes Cacuit Card Assy Single-turn potentiometer allows low Fadure (Figure 8) gross fadure tnp pomt to be set be.

Adi ustment* tween 05 and 40 mA. Gross fadure output is high (logic level 1) when transmitter curror't fails below the low gross faduce semng Hig% Gross Yes Yes Yes Cecuit Card Assy Smgle-turn potentiometer allows high Faelure (Figure 8) gross failurs inp pumt to be set be-Adjustment

• tween 195 and 40 mA Gross failure output is high (logic level t) when transmitter current exceeds the high gross fadure semng Trep Output Yes Yes Yes Cacud Card Assy Switch determines the logic of the Logic (Fagure 8) Inp output to be high (logic level 1)

Swetch' either above or below the tnp point Normal and reversed trip output logic are defmed in the " Specifications" section Tnp Status Yes Yes Yes Cacuit Card Assy Switch determees the logic of the Output / LED (Figure 8) trip status LED so that the LED is Logic either on or off when the inp output is Switch

• high Normal and reversed trip status output / LED logic are defmed in the

• Specificat.ons" section Tnp Point Yes Yes Yes Front Panet Ten-turn screw type potentiometer Adgustment (Figures 6 and 7) provides for semng the inp point any-where in the 4 to 20 mA range, with a resolution of 00t mA Gross Yes Yes Yes Front Panet Momentary push button switch resets Faduce (Figures 6 and 7) the la'ching gross fa lure output and Reset mdication LED Gross Yes Yes Yes Front Panet Red LED comes on when a gross Failure (Figures 6 and 7) tadute is detec*ed and stays on untd iED reset Trip Status Yes Yes Yes f ront Panet Red LEP (-isplays the trip output level LED IFiguees 6 and 7) accordmy to t5e ionic setected Meter Yes Yes No Front Panet Meter displays the enput segnal from a (Figure 6) 4 lo 20 mA transmitter with a ?%

accuracy 5

Test Jack Yes Yes Yes Front Panet Jt is used to mon 4or the sensor mput Ji (Red) (Figure 6) segnal to the Master Tren timts J1 is used on tne Sf ave Grip Umt to mc .=

sts input segnal Reference J2 on the Caltbvatron Umt Test Jack Yes Yes No Front Panet J2 is used to monitor the optional J2 (White) (Figure 6) aundiary ana*og output s gnal. Refer-ence J2 on the Canbration Umt.

Zero No Yes No Circu t Card Assy Adtust Zero Point (32"F mmimum to Ad;ust * <Fityure 9) 500*F maniscump Span No 'Yes No Circuet Card Assy Artfust Sp.en i100 F merwmum to Adtust' (F gre 91 %R F mas norm tiricasety No M No Ce< uis ( and Av., Compensate tu non Imca stres rA ttie Adiust* (Figure m RTD ovee the seiccted sp,an

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15

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Figure 9. R TD Input Master Trip Unit- Circuit Card Assy Adjustments.

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TABLE 10 ADJUSTMENTS AND DISPLAYS 710DU Calibration Unit (See Figure 10)

Adjustment / Display Fuaction Power Switch ON/OFF switch controls the application of 24 Vdc power to the Calibration Unit and Reado'Jt Assembly.

i Readout Assembly Door The removable Readout Assembly plugs into the Calibration Unit through the spnng-loaded door.

Cahbration Select and Command Switch Two-part rotary and push / pull switch has three calibration select and control functions. The smaller (center) knob selects the Master Tnp Unit to which the calibrate command / calibration current is routed and, when pushed in, activates the calibrate command / calibration current. The larger (outer) knob selects the Master or Slave Trip Unit whose trip status is being monitored.

Both knobs have 12 active (address) positions and an off position. The smaller knob is locked (cannot be rotated) when pushed in. Th.e largcr knob can be rotated at all times.

Transient Current Arrelitaide Adjustment Single-turn push / pull potentiometer is used to set and engage the transient cahhration current. With the potentiometer pushed in, transient current can be adjusted from 0.5 to 20.5 mA. and added to or subtracted from the stable calibration current - depending on the position of the Transient Polarity Switch. When the potentiometer is pulled out, transient current is disengaged.

Transient Polarity Switch Positive / negative switch enables the transient current to be added to or subtracted from the stable calibration current.

Stable Current Amplitude Adjustment Ten-turn potentiometer is used to adjust the stable calibration current through a 3.5 to 20.5 mA range.

Calibration Status LED Red LED is lighted when the smaller (center) knob of the Calibration Select and Command Switch is pushed in.

Test Jack J1 (Red) J1 is used to trigger an osci!!oscope to measure time response characteristics of the 710DU System, or the time response of equipment controlled by the 710D0 System.

Test Jack J2 (Black) J2 provides an output for the signal return. This is the reference point for all voltage measurements on Trip Umts

[ - Test Jack J3 (WNte) J3 provides a test point for the trip status output which is used to measure the time response of the trip output.

1- 17 1

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TRIP CUEIRE NT DISPLAY CAttBR ArlON CURRE N r DISPL AY ';

HANDLE g Figure 11. Readout Assembly - Adjustments and Displays.

TABLE 11 ADJUSTMENTS AND DISPLAYS -

710DU Readout Assembly (See Figure 11)

Adjustment / Display Function Calibration Current Display Lower readout displays total calibratiori current generated by the Calibration Unit. Range of the display is from 00.00 to at least 45.00 mA with 0.01 mA resolution.

Trip Current Display Upper reacout tracks the stable calibration current shown on the Calibration Current Display (lower readout) until a trip occurs in the Master or Slave Trip Unit being calibrated. At that point. the trip status signal latches the Trip Current Display. The display is blanked when transient current is activated.

Trip Status LED Red LED indicates that the Trip Current Display is latched. It must be reset before trip current can be read for reversed trip status logic.

Trip CJrrent Display Reset Push button switch reverses the latching logic for ths Trip Current Display and Trip Status LED so trip current can be read for reversed trip status logic.

Zero Adjust Multi-turn potentiometer is accessible through Readout Assembly housing, near rear of unit. Zero adjustment provides for an equal change in the two digital displays for both low and high value readings.

Span Adjust Multi-turn potentiometer is accessible through Readout Asser'tly housing.

near rear of unit. Span adjustment provides for a small change in both digital displays for low value readings, and a greater change in the displays for high value readings.

Handle Handle provides for easy removal and insertion of Readout Assembly in Calibration Unit.

18

SECTION IV THEORY OF OPERATION INTRODUCTION This section of the manual presents the theory of opera- given first; the theory of operation for each unit or tion of the 7100U Tria/C . dion System, and includes assembly in the Trip / Calibration System follows. For biock diagrams and c.her sur diagrams. additionalinformation, refer to the applicable Rosemount Specification Control Drawing.

An overall description of the entire 710DU System is 710DU SYSTEM The functional block diagram shown in Figure 12 illustrates the theory of operation of the 710DU System.

• CALIBRATE 24 V - - ,

COM%tAND POWER CALiB R ATION SUPPLY ynspgTATyg U i i *C 18 ATi%

slGNAL FROM ASSE M9 LY SELECTED CAllBRAitON STATUS MAST E R OR TEsTJACK SLAVE TRIP UNIT

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g l YAST[ R ON g l - SLAVE INPUT TESTJACK L -> To ADDITrONAL SL AVE TRipuNsis l 5 17 MAxiVLM PE R MASTE9 T Rep UNlT) g CARDFetEg Figure 12. 710DU Trip /Caribration System Functional Block Diagram.

The 710DU Trip / Calibration System includes a Card File Master and Slave Trip Unit Operation containing Master Trip Units. Slave Trip Units, a Calibra-tion Unit. and a Readout Assembly. When the 710DU One Master Trip Unitis required for each sensorinput. A System is connected to a 24 Vdc power supply, and 4 to Master Trip Unit produces two analog signals, an auxilia-20 mA uansmitters or 3-wire platinum RTD's. easily- ry signal for driving external recording or monitoring calibrated trip points provide trip outputs for any input equipment, and anotNr signal for driving up to seven signal level. The Master Trip Unit provides a latching Slave Trip Units. Each Slave Trip Unit adds one addi-gross failure output when the input signal drops below or ticnal trio point and one qroSs failure output for the input exceeds low or high limits, respectively. sensor channel. LED's v.i each Master and Slave Inp 19

F:  ?

a Unit's front pansi provide visualindication of trip outputs latchec the uppcr display of the Readout Assembly. An and gross failure outputs. Master Trip Units provide an LED on the Readout Assembly indicates that the display analog meter to display the input signal and a test jack is latched. A reset but%n provides for reading reverted (J1) to monitor that signal. The Master Trip Unit has an trip status logic.

additional test jack (J2) to monitor the auxiliary analog output signal. A stable calibration current source is used to venfy or calibrate trip points or check analog outputs. A transient Adjustments are include. 'he Master and Slave Trip calibration current source can be used with the stable Unit printed circuit bosds e atting the trip output logic; current for time response measurements. The stable and trip status output logic; gross failure low current trip out- transient currents can be adjusted, and a transient polar-put; gross failure high current trip output; and reset ity switch enables transient current to be added to or differential. The 4-20 mA fnput Master Tr+ Units also subtracted from stable current, depending on the logic have an adjustment for the frequency response of the desired. 3 auxiliary analog signal.

The Calibration Unit's front panel includes a two-part Calibration Unit and Readout Assembly Operation calibration seh;ct and command switch which initiates the calibration process, routes the calibration current to The trip point for any Master or Slave Trip Unit in the a Master Trip Unit, and selects the Master or Slave Trip 710DU System can be venfied or accurately calibrated Unit whose trip paint is being moni:ored.

by the Calibration Unit and Readout Assembly. The Cali-bration Unit replaces the input signal with an adjustable Test Jacks are provided for transient trigger output (J1),

Calibration signal, which is shown on both four-digit dis- signal return (J2), and trip status output (J3).

plays of the Readout Assembly. When the calibration current passes through the trip point of the Trip Unit The ON/OFF switch on the Calibration Unit controls being calibrated, the trip status signal changes state and power to the Readout Assembly and Calibration Unit.

l CARD FILE The Card fue houses the Master Tnp Units, Slave Trip Calibration Unit and the Master Trip Unit to which Units, and the Calibration Unit, and provides electrical calibration current is fed;it also connects the Calibration v interface among them. The 24 Vdc power supply and Unit and the Master or Slave Trip Unit whose inp point is input sensors tre connected to the Card File, along with being venfied or adjusted. In addition, all Top Units and relays, alarms, meters. recorders, actuators. or any cther the Calibration Unit are wired for 24 Vdc power and loads driven by the trip output, gross failure output, or chassis ground.

auxiliary analog output of the 710DU System.

The customer must make the necessary interconnections The Card File (see Section V " Wiring and Installation", between the Slave Trip Unit input and the analog-to-and Figure 23) provides electricalinterface between the Slave signal from a Master Tnp Unit.

MASTER TRIP UNIT (4-20 mA INPUT)

A functional block diagram of the 710DU Master Trip fers)in the Master Trip Unit circuit. In addition, the +15 Unit is shown in Figure 13. Vdc drives an oscillator used to generate the -4.7 Vdc (negative) power required by the operational amplifiers.

The Master Tnp Unit mounts in any of the first 12 Card and generates a +6.2 Vdc reference voltage.

File locations; it is connected to a 24 Vdc power supply via terminals 2,3, and 4 of the Card File, and to a remote The 4 to 20mA transmitter current is fed into a 250 ohm transmitter via terminals 14 and 15. The Master Trip Unit prec:_ x resistor where a 1 to 5 Vdc voltage is de-conditions a 4-20 mA signal from the transmitter pro- veloped.

viding trip output and gross failure output signals.

This voltage is buffered and filtered by a second order The 24 Vdc input is regulated to the +15 Vdc by a low pass filter with a break frequency of approximately standard design internal power supply. The +15 Vdc 250 Hz;it is used in the Master Top Unit circuit for the supplies the positive voltage required by the operational analog meter, and generating the trip output, trip status ~-

amplifiers (used as comparators, scahng amps, or buf- output, and gross failure output.

20

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Analog Meter The 1 to 5 Vdc signal drives an analog meter (accuracy 74 u iR,P Pomt e o%

/

of 3% of full scale) located on the Master Tnp Unit's front DI LHE ASING CUHRE N r H GH TRIPOUTPUT

. panel. The meter provides for continuous monitoring of 24 VR NOMINAL the transmitter loop. The analog meter is protected 22 0 .

d' against short circuit current loads. _

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i The 1 to 5 Vdc signalis compared by comparator@(see N block diagram Figure 13) with an adjustable buffered towfRiPouTPUT I TO5VR ANALOG slGNAL APPROX 1MATELY FOR4To20mA

, reference voltage (adjusted by a 10-turn potentiometer). 20 -

Ove TRANSMITTER stGNAL oR EoUfVALENT RTD SPAN If the signal does not pass through the adjustable refer- ,, .

ence voltage level, no trip action occurs, if the 1 to 5 Vdc - me'EAsNdu'ORr Nr signal passes through and becomes greater than the " ~ ~f [ ], ,,,, , , ,

i reference voltage, the resulting inp output changes from IRA %Msfit H CURREN1 cmAl 0 Vdc to approximately 24 Vdc (logic level 1). By chang.

ing the position of the trip output logic switch, the logic of the trip output is reversed;i.e., trip output changes from figure 74. Trip Output - NormalLogic.

24 Vdc to approsimately 0 Vdc (logic level 0) when the 1 to 5 Vdc signal passes through and becomes greater Comparator h has a strigle-turn potentiometer which than the reference voltage. Figures 14 and 15 illustrate can be used to adjust the reset dif'erential of the trip ,

. normal and reversed trip output logic. point fror.10.5 to 7.5% of the transmitter current spa 1.

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TRIP OUTPUT TRIP STATUS LED TNc'n"EEG C$a"ENT 0Vdc OFF HIGH TRIPouTPUT }

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- nEsET

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TRIP STATUS LED f

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'o-- - TalP point ron__. + 24 Vdc OFF

, ' DECRE ASING CURRENT ' _ T APPRoxwATEtv OVdc , ,_

• ** ' Figure 17. Trip Status LED - Reversad Logic.

TnAnsuiTTs'n%nnENQ, Figure 15. Trip Output - Reversed Logic. , ulGH cunaENT cunnENT l: .i"%

L ,ta g L-Trip Status Output ,y.,

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9 j erence signal by comparator @ (see block diagram).lf comparator @ output becomes greaterthan +62 Vc'c,

{22o g

h f

rAituREGRoss -(QyQh, '"^'v'f the trip status output changes from 0 Vdc to approxi. j so M' 'N DN[

mately 12 Vdc (logic level 1), and the trip status LED 2 .N LowouTPUT N

I comes on. lf comparator @ output becomes less than APPROX 4ATELYl N N

+6.2 vdC, trip status output changes from 12 Vdc to approximately 0 Vde, and the trip status LED goes off. y]

T RANSMITTE R CURMENT imA)

Trip status output / LED logic can be reversed by chang-ing the positson of the trip status output / LED logic Figure 18. Gross Failure Output Limits.

switch. The trip status output then changes from 12 Vdc to approximately 0 Vdc (logic level 0), and LED goes off when comparator @ outputtsecomes greaterthan +6.2 Both the gross failure output signal and gross failure Vdc. Trip status output changes from 0 Vdc to approxi- LED's stay lighted untd manually reset by the gross

. mately 12 Vde, and the LED comes on when compara- failure reset button on the Master Tnp Unit's front panel.

tor @ output becomes less than +6 2 Vdc. Refer to Figures 16 and 17 for normal and reversed trip status Two Analog Signals output logic diagrams.

The Master Trip Unit provides both a buffered analog Gross Failure Output signal to drive up to seven Slave Trip Units, and a buffered auxiliary analog output for extemal equipment.

Comparators @ and @ compare the 1 to 5 Vdc sig- Both analog signals provide 1 to 5 Vdc outputs corre-nal with two separate reference voltages, which can be sponding to 4 to 20 mA transmitter inputs or 3-wire RTD adjusted by single-turn gross failure adjustment poten- Inputs.

tiometers. One of the reference voltages it set to indicate a high current failure; the other, a low current failure. The analog-to-Slave output has a second order break When transmitter current is outside the preset high or frequency at 250 Hz, while the auxiliary analog output low refe6ence limits, the output from the comparators frequency response is determined by a second order low generates a latching gross failure output signal (approxi- pass filter adjustab!e between 0.6 and 8.0 Hz.

mately 24 Vdc) and turns on a gross failure indicating LED. The gross failure output / LED can be adjusted to The auxiliary analog output is protected against the indicate a gross failure for low transmitter currents following conditions: shorting the output to ground; between 05 and 4.0 mA or below, and high currents shorting the output to the +24 Vdc power supply; shorting between 19.5 and 40 mA or above Gross failure limits the output to +125 Vdc; shorting the output to +115 Vac; -

are illustrated in Figure 18. and operating the output with no load.

22

\

. s to a sepvate 240-ohm resistor, allowing the 250 ohm Input /Cutput C:pabilities res!stor to' rsceive calibration current. The calibrate The Matter Trip Unit rsquires a maximum of 260 mA at command signat also causes the Master Tnp Unit to 24 Vdc exclusive of out9ut foads. Both the trip output and produce a 24 Vdc gross failure output signal,indicatmg that the Trip Unit is inoperative during calibration.

gross failure output a:e capable 01 driving a resistive load of 24 ohms of larger, md an indudve load of up to 4 Henries. Both the trip ontout and gross failure output are When the calibration current fed to the Master Tnp Ur it es. If,the trip output fuse is equal to the desired trip current (visible on the Readout protected by 1-1/2 an .

opens, transmitter s urrem 'arnd flow and a gross Assembly), the trip point poten$ometer on the Master

' Trip Unit's front panelis adjusted until the trip status LED failure is indicated. ,

jusf comes on. Calibration current can then be increased or decreased so that when it passes through the estab-

• The input signal to the 710DU Sptem can be monitored

' ' lished trip point, the trip status output provides a signal to by using test jack Jt (red jack on front panel) which tt'e Peadout Assembly. This signal latches the upper I provides an unt,& , red 1 to 5 Udc signal proportional to the sensor input ' display of the Readout Assembly at the trip poir't wh6n the trip occurred. This procedure can be repeated until the trip point is set at the exact value desired.

CaFbration The calibration current routed to the Master Trip Unit (Deta!!ed procedures are in the " Calibration and Opera-includes stable and transient currents, or stable current tion" sectson )

only. Stable calibration current is used to calibrate or The Mmer Tsip Unit can be checked or adjusted for trip verify trip points, and check the analog meter. Transient point cwacy by the 710DU Calibration Unit arid Read- calibration current can be added to or subtracted from stable current to determine the time response of the out Asseinbty. Tne Calibration Unit provides the Master Maste< Trip Unit, loads dnven by the Tnp Unit, or to set Trip Unit witn a 24 Vdc calibrate command signal which energizes a DPDT relay, K1 (Figure 13). At that time, gross fait limits.

transmitter current is transferred ' rom a 250-ohm resistor MASTER TRIP UNIT (RTD INPUT) potentiometers are located on the circuit tward and are Refer to Figure 1[ Sr a functional block diagram of the not accessible when the board is installed in the Card 710DU RTD input Master Trip Unit. Fife.

The buffered 15 Vdc bndge output signal is fed into a The theory of operation for the Master Trip Unit with RTD 250 Hz low pass filter which is identical to the filter in input is the same as the operation of the Master Trip Unit the 4-20 mA input Master Tnp Unit. The remaining func-with 4-20 mA Input except for the following:

tional blocks; tnp comparator, gross fait comparators, The Master Trip Unit is connected to a remote RTD via and analog output to slave are identical to those de-scribed in the 4 20 mA Input Master Top Unit section.

terminals 14,15, and 4 and condi* ions the input signal.

The auxiliary analog output circuit in the RTD Input Mas-The 100 ohm R, RTD fcrms part of a resistance bndge in ter Tnp Unit coes not have an adjustable 0.8 to 8 0 Hz the Master Trip' Unit. The 3-wire configuration reduces the effect of RTD lead resistance changes due to temper. tow pass filter. Otherwise, it is the same as the 4 20 mA ature. The voltage differential between the active and Master Tnp Unit.

passive legs of the bridge is amplified and be*comes a buffered 1-5 Vdc bridge output signal. Figure 19 shows the block diagram of the RTD input Master Trip Unit.

This 1-5 Vdc signal is proportional to 10-50% of span.

The maximum adjustable span is 568 F. The minimum Calibration adjustable span is 100 F. The zero may be suppressed (Detailed procedures are in the " Calibration and Opera-from 32 F to 500 F.

tion" sect;on.)

The bridge circuit no compensates for the noniinearity inherent in a Platinum RTD. The linearity adjustment is The Master Tnp Unit can be adjusted or checked for tnp set as a function of the desired span. point accuracy by the 710DU Calibration Unit and Read-out Assembly. The Calibration Unit provides the Master The range of zero and span adjustments available is Tnp Unit with a 24 Vdc calibrate command signal which shown graphically in Figure 20. Zero, span, and linearity energizes a DPDT relay Kt (Figure 19). At that time the 23

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• teOTE: afutMnE OF RTDf5 CO8eNECT E D TO PIN 4 Figure 19. RTD Input Master Trip Unit Functional Block Diagram j SV -

@ Fullspanadjust

@ Nozero suppression Voltage b @ Minimummanadjust atJ1 Nozero suppression

@ Minimumspan Maximum zero suppression A -

1 IV '

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32F 132F 500F 600F v

I l Figure 20. Adjustment Range of RTO Input I

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.- - . - - - . . . - . - . , .n , . . , , . , ,, ..,c,n., , 7----.-.- . , - - , . . , , ..n-- . - - - . - . . . . - . - . . , - < , --

- Bridge RTD ltg is disconnscted from th3 Emplifitr and a indicating that the Trip Unit is inoperative during cali-250 ohm precision resistor is connected between the bration.

amplifier input and ground. The feedback resistor on the When the calibration current fed to the Master Trip Unit amphfier is also shorted and 6.e arapLfier becomes a is equal to the desired trip current (visible on the Readout unity gain buffer.

Assembly), the trip point potentiometer on the Master Tnp Unit's front panel is adjusted until the trip status LED The 250 ohm resistor can now eceive cahbration current and 4-20 mA will genera M Vdc. jusf comes on. Calibration current crsn then be increased or decreased so that when it passes through the estab-The relationship between calibration current and RTD lished trip point, the trip status output provides a signal to resistance is shoy n by the following equation; the Readout Assembly. This signal latches the upper display of the Readout Assembly at the trip point when Equivalent Current = 4 mA + 16 mA (R - R ,,) the trip occurred This procedure can be repeated until (R u- - R,,,) the trip point is set at the exact value desired.

Where R =mRTD resistance at any given time The calibration current routed to the Master Trip Unit R,,, = RTD resistance which makes the volt-age at J1 (front panel) 1.000 Vdc (zero) includes stable and transient currents, or stable current t

only. Stable calibration current is used to calibrate or R% = RTD resistance which makes the volt.

verify trip points, and check the analog meter, Transient ag"t at J1 (front panel) 5.000 Vdc (full calibration current can be added to or subtracted from scale) stable current to determine the time response of the Master Trip Unit, loads driven by the Tnp Unit, or to set The calibrate command signal also causes the Master gross fail hmits.

Trip UnM to produce a 24 Vdc gross failure output signal, SLAVE TRIP UNIT Refer to Figure 21 for a functional block diagram of the input / Output Capabilities 710DU Slave Trip Unit The Slave Trip Unit requires a maximum of 225 mA at 24 The Slave Trip Unit mounts in any of the first 12 Card File Vdc exclusive of output loads. Both the trip output and locations; it is connected to a 24 Vdc power supply via gross failure output are capable of driving a resistive terminals 2,3 and 4 of the Card File, and to a Master Trip load of 24 ohms or more, and an inductive load of up to 4 Henries. Both the trip output and gross failure output are Unit via terminals 12 and 4 of both Units.

protected by 1-1/2 amp fuses.

A standard design internal power supply regulates the 24 Vdc input +15 Vdc, providing the positive voltage Calibratiori required by the operational amplifiers (used as com-parators or a buffer)in the Slave Tnp Unit circuit The + t 5 The Slave Trip Unit can be checked or adjusted for trip Vdc drives an oscillator used to generats -4.7 Vde, the point accuracy by feeding calibration current from the Calibration Unit into the Master Trip Unit that is driving i

negative voltage required by the operational amplifiers.

in addition, the +15 Vdc generates a +6.2 Vdc reference the Slave. The Cahbration Unit and Readout Assembly are then used to monitor the trip status output from the l voltage.

Slave Trip Unit Each Slave Trip Unit in the 710DU System is dnven by the 1 to 5 Vdc analog signal of a Master Trip Unit The When calibration current is equal to the desired trip Slave Unit conditions the signal to provide both an current, the trip point potentiom ;ter is adjusted until the additional, independently adjustable trip point for the trip status LED jusf comes on. Calibration current then same input sensor connected to the Master Unit, and an can be increased or decreased so that when it passes additional gross failure circuit through the trip point, the trip status output from the Slave Trip Unit provides a signal to the Readout Assem-The theory of operation for the trip output, trip status bly. The trip status signallatches the upper display of the output, and gross failure ou'put generated by the Slave Readout Assembly at the trip point when the trip l

~ Tnp Unit circuit is identical to that of the Master Trip Unit. occurrea.

i All Slave outputs are independent of Master outputs.

l The preceding procedure can be repeated as required to For information on trip output, trip status output, and set the inp point to the exact value desired. See the

" Calibration and Ooeration" section for detailed pro-gross failure output, refer to Master Trip Unit (4 20 mA Input) Section, cedures.

l 25

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Figure 21 Slave Trip Unit functional Block Diagram.

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26

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k CALIBftATION UNIT Refer to Figure 22 for a functional block diagon of trie 1 7100U Calibration Unit.

6s activated and transient current is routed the same way as stable current. Activating the transient current pro-d The Calibration Unit mounts in location 13 of the Card File and is connected to any Master and Slave Trip Units duces a current step with a rise or fall time not in ex-Ir* 8ocations 1 through 1. 'arminals 5,6, and 7 of the cess of 100 microseconds.

Tpp Units. The 24 VL : pc.. connected to terminals 2 ,

and 3 d the Cahbration UnJ. is also used to power the When transient ciaerent is activated, a 24 Vdc transient Readout Assembly when it is inserted in the Cahbration blanking signal is sent to the Readout Assembly to blank out the trip current display (see Readout Atserr,bly  ;

Unit An intemal power supply regulates the 24 Vdc to gener-ate reference voltages used in establishing stablo and The transient trigger signal can be monitored through transient current sources. The cahbration current pro- test jack J1 on the Cahbration Unit's front pand J1 duced by the Cahbration Unit can be stable current onF/, receives a fast rise time signal from ths Schmidt trigger or the sum or difference of stable and transient currents. that activates the transient current. Th6 signal can be Stable cabbration current is adjustable from 3.5 to 20.5 used to trigger an oscilloscope for time delay measure-mA by a 10 tum stable current amphtude potentiometer. ments of the 710DU Synem or equipment driven by it A single-turn push pull transient current amphtude poten-l tiometer has two functions: it allows transient cahbration current to be adjusted from 0 5 to 20 5 mA, and to be

, either engaged or disengaged from stable current. If Calibration Status LED and Signal transient current is engaged, a transient polanty switch determ;nes whether it is added to or subtracted from the When the double-pole cahbrate command / calibration current switch is activated (pushed in), the cahbration stable current.

status LED comes on. In addition, a 24 Vdc cahbration status sigr'al is generated for remote display to indicate which Card File has a Trip Unit being cahbrated.

Stable Current Operation When a Readout Assembly is inserted, relay K1 in the Cahbration Unit is opened and stable cahbration current ChhWWNMhm is routed to the Readout where it is measured with a 0.01 mA resolution. The calibration current then goes to the The Cahbration Unit has two 13-position rotary, con-Master Trip Unit which is being cabbrated (or, which is centric push / pull switches - a single-pole switch on driving a Slave Tnp Unit)~ the outer shaft, and a double-pole switch on the inner shaft The switches are used to route the cabbrate If a Readout Assembly is not plugged into the Cahbration Unit, relay K1 is closed and the cal i bration current is Me W either routed to a 240-ohm tesistor in the Cahbration Unit Unit to be cahbrated (or which is driving a Slave to be or -if the Cahbration Unit is in the cahbrate mode - to a g Master Tnp Unit for cabbration. If cahbration current is command and cabbration current to that Unit. The single-routed to the 240-ohm resistor, approximate voltage ole s y tch selects the Master or Stava Trip Unit whose levels are estabhshed throughout the Calibration Unit trip status is being monitored and routes the trip status even though it is not supplying current to a specific Trip signal from that Trip Unit to the Cahbration Unit, and Unit. When the cahbrate mode is activated, calibration ultimately to the Readout Assembly.

Current is routed from the resistor to the appropriate Tnp Unit.

Stable cahbration current has a maximum rate of change Test Jacks of 1.01D.1 mA per second.

The Cahbration Unit's circuit provides for the tnree test jacks. J1, oiscussed previously, is used to monitor the Transient Current Operation transient tngger signal. J2 is a signal return which can be used for both the Calibration Unit and Master Trip Units.

J3 accesses the inp status output of the Master or Slave When the push / pull transient current potentiometer is Tnp Unit being cahbrated.

pushed in to engage transient current. a Schmidt trigger 27

a t' .

READOUT ASSEMBLY Refer to Figure 23 for a furictional block diagram of the pulses which are fed into two counter / driver / multiplexer 710DU Readout Assembly. (CDM) chips. The clock pulses are proportional to cali-bration current and are counted by the CDM's. The The Readout Assembly plugs into the 71000 Calibrat;on CDM's convert the pulses to signals that drive two sepa- ,,_,,

Unit, with electrical conrections made through a 15 pin rate four-digit, seven-segment displays (the tnp current mating connection.1 ie 4 ' ad 24 Vdc input is supplied and calibration current displays).

via pins 2 and 4 of the cor,ns , 3r.(Other pin designations are detailed in the " Wiring and installation" section.) The reset logic pt.;se from the logic circuitry resets the CDM's, while the latch logic pulse determines which An inter"al de-to-dc converter generates the required numbers stored in the CDM's will appear on the two

+ 15 Vdc, -15 Vde, and + 5 Vdc required by the Read- displays.

out Assemby circuit. A zener diodo provides a + 18 Vdc reference signal. Trip Status Signal When inserted in the Calibration Unit, the Readout A trip status signal (either 0 Vdc or 12 Vdc) from the Assembly provides a 24 Vdc disp!ay engaged signal Master or Slave Tnp Unit '2nder calibration latches the which opens a relay (K1)in the Calibration Unit, outing upper (trip current) display when a trip action occurs, the calibration current through a 50-ohm resistor in the and causes a inp status LED to indicate that the trip Readout Assembly. The 0.2 Vdc to 1.0 Vdc developed current display is latched. The display remains latched across the 50-ohm resistor is buffered, amplified, and fed and the LED on untd the trip status voltage changes into a voltage-to-frequency converter. state, or the trip current display reset button is pushed.

After the reset button is pushed, the trip current can be Pulses Produced read for reversed trip status logic.

A 40.2 K Hz crystal oscillator signal is fed into a divide- Transient Blanking Signal f bv-16 counter, with the output from the counter fed into a four-bit counter. The outputs from the four-bit counter, The Readout Assembly circuit receives a tranient blank-together with logic circuitry, determ ne window, latch, ing signal that blanks out the trip current display when and reset pulses. transient current is engaged. The blanking signal pre--

vents erroneous readings on the display which might The window pulse and the output from the voltage-to- result from the fast rise time of the transient current.

frequency converter are used to determine the clock y

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J Figure 23. Readout Assembly functional Block Diagram.

28

F SECTION V i WIRING AND INSTALLATION j GENERAL Wiring and installation instructions for the 710DU Trip / these steps before proceeding to the " Calibration and Calibration System e c( d ir; this section. Complete Operation" procedures discussed in Section VI. ,

WIRING Card File power return for all loads except analog-to-Sl6ve.

The wired 710DU Card File is shown in Figure 24. auxiliary analog outputs, and RTD bridge reference ors RTD Masters; and Terminal 4 is the signal return for The terminal bars are numbered on the photo from right those three functions, as well as transmitter curren' and to left; TB1 through TB12 are for Master cr Slave Trip smal: currents used to generate reference voltages in each Master Trip Unit.

Units TB15 and TB14 for the Calibrat'on *Jnit Terminal bar TB1 shows how individual termials are designated on the first 13 bars (i.e., terminal bar number M owed by For 7100U calibration purposes, the Card File also terminal number). Termir,al numbering for I,ar TB14 is provides an electrical interface between the Calibration shown on the photo. Unit and Master or Slave Trip Units. Insulated, tin-coated copper wires connect terminals 5. 6 and 7 of terminal Bus bars are included across terminals 1 and 2 of bars TB1 through TB12 to bars TB13 and TB14, providing terminal bars TS1 through TB13. Terminal 1 is chassis for trip status, calibrate command, and calibration cur-ground; Terminal 2 is 24 '/dc power; Terminal 3 is the rent. See Tabias 12 and 13 for interface details.

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Figure 24. Wired 710DU Card Fde.

29

e TABLE 12 CARD FILE TERMINAL ASSIGNMENTS Master and Slave Trip Units Terminal Bars TB1 through TB12 NOTE: Although cahbrate command and cabbration current signals are toured to ari Tnp umts. tey are used only by Master Trep units Terminal ' Signal F --nclature Remarks 1 Ch ssis , , Jnd Should be grounded to the relay rack external to the Card File.

2- +24 V Power 3 24 V Power Return This ground is the return for all loads except the analog to-Slave and auxiliary analog outputs. Power return must be bussed back to the power supply separate from the signal return.

4 Signal Return This ground is the return for the analog-to-Slave and auxiliary analog outputs, transmitter current, and small currents used to generate reference voltages in each Master Trip Unit. Signal return must be bussed back to the power supply separate from the power return. USE SHIELDED CABLE.

RTD Bndge On RTD input Master Trip Units, this ground also generates the reference vol-Connection tage fOr the resistance bridge. The third wire of the RTD is connected to this ter-minal. USE SHIELDED CABLE.

5 Trip Status 0 or 12 Vdc logic level to the Readout Assembly in the Calibration Unit. It latches the trip current display after a trip action.

6 Calibrate Command 24 Vfc signal from the Calibration Unit which opens the transmitter signal loop (Master Trip Units) and clo.es the calibration current loop. It also causes a gross failure indicatiorr output on the Master Top Unit.

7 Calibration Current input of total calibration current from the Calibration Unit. L (Master Trip Units)

Terminals 8 and 9 are shorted together on the pnnted circuit board for the Card #

8 Card Out Alarm 9 Card Out Alarm Out Alarm system. See K4 in Figure 24.

10 Gross Failure Output Drive for external relays which signals that preset hign or low transmitter signal limits have been exceeded, or a Tnp Unit is being calibrated.

11 Trip Output Dnve for external relays which operates when the trip point is passed tr. rough.

12 Analog-Output-ta-Slave O to 10 Vdc (calibrated from 1 to 5 Vdc) analog signal proportional to transmitter (Master Trip Units) current or 3-wire RTD signal. Bussed back to power supply by signal return.

Analog input 0 to 10 Vdc (calibrated from 1 to 5 Voc) analog signal from Master Tnp Unit.

(Slave Trip Units) Slave Trip Unit comparators t'se this signal to determine the trip output stato.

13 Not Used 14 4 to 20 mA Transmitter 17.4 to 22.7 Vdc nominal excitation to remote transmitter. USE SHIELDED Excitation CABLE.

RTD Bridge RTD lead to resistance bridge circuit. Single lead end to terminal 14. USE Connection SHIELDED CABLE.

15 4 to 20 mA Transmitter Transmitter current input to Master Trip Unit. Current is fed through a 250-ohm Return resistor. USE SHIELDED CABLE.

RTD Bridge - RTD lead to resistance bridge circuit. Dual teaci end to terminal 15. USE Connection SHIELDED CAELE.

16 Auxiliary Analog Output 0 to 10 Vdc (cidibrated from 1 to 5 Vdc) analog signal proportional to transmitter (Master Trip Units) current for driving external recorders, controllers, etc. Bussed back to power supply oy signal return. The signal is capable of driving resistive loads from j 1.500 ohms and up.

30

. _ . . . - . = . _ . _ _ _ _ . . _ _ _.. . __ .- .

s.

< TABLE 13 -

CARD FILE TERMINAL ASSIGNMENTS Calibration Unit - Terminal Bars TB13 and TB14 Card File ,

Terminal Signal Nomenclature Location Remarks TB13-1 Chassis Ground -

Grounded to relay _r_ ark external to Card File.

. T B13-2 +24 V Power -

1 TB13 3 24 V Po er ' rn -

TB13 4 Signa Rete -

TB13 5 Calibration Status - 24 Vdc signal for remote indication that the Calibration Unit is in use. Signal will drive a resistive load of 75 ohms and up, and an inductive load of up to 0.8 Henries.

TB13 6 Calibrate Command 12 24 Vdc signal to selected Trip Unit to enable it to accept calibration current.

TB13-7 _ Calibration Current 12 Sum of stable and transient calibration current to selected Trip Unit.

TB13-8 Card Out Alarm - Terminals B and 9 are shorted together on the printed circuit board for the Card TB13-9 Card Out Alarm - . Out Alarm system.

TB13-10 Trip Status - 1- 0 or 12 Vdc logic level from Trip Unit selected. Latches trip current display on Readout Assembly.

TB1311 Calibrate Command 1 24 Vdc signal to selected Trip Unit to enable it to accept. calibration current. _

TB13-12 Calibration Current 1 Som of stable and transient calibration current to selected Trip Unit.

TB1313 , Trip States 2 0 or 12 Vdc logic level from Trip Unit selected. Latches trip current display on Readout Assembly.

T313-14 Calibrate Command 2 24 Vdc signal to selected Trip Unit to enable it to accept calibration current.

TB1315 Calibration Current 2 Sum of stable and transient calibration current to selected Trip Unit.

TB13-16 Not Used -

TB141 Trip Status 3 0 or 12 Vdc logic level from Trip Unit selected. Latches trip current display on Readout Assembly.

TB14 2 Calibrate Command 3 24 Vdc signal to selected Trip Unit to enable it to accept calibration current.

i TB14;3 Calibration Current 3 Sum of stable and transient calibration current ta selected Trip Unit.

TB14 4 Trip Status 4 0 or 12 Vdc logic level from Trip Unit selected. Latches trip current display on Readout Assembly.

!J TB14 5 Calibrate Command 4 24 Vdc signal to selected Trip Unit to enable it to accept calibration current.

1' TB14 6 4 Sum of stable and transient calibration current to selected Trip Unit.

Calibration _ Current

. TB14 7 Trip Status 5 0 or 12 Vdc logic level from Trip Unit selected. Latches trip current display on Readout Assembly.

T B14 8 Cahbrate Command 5 24 Vdc signal to selected Trip Unit to enable it to accept cahbration current..

TB14 9 Calibration Current 5 Sum of stable and transient calibration current to selected Trip Unit.

TB1410 ' Trip Status 6 0 or 12 Vdc logic level from Trip Unit selected. Latches trip current display on Readout Assembly.

TB1411 Calibrate Command 6 24 Vdc signal to selected Trip Unit to enable it to accrut calibration current.

l TB1412 Calibration Current 6 Sum of stable and transient calibration current to selecsd Trip Unit. ,

TB14-13 Trip Status 7 0 or 12 Vdc logic level from Trip Unit selected. Latches trip current display on Readout Assembly.

l 24 Vdc signal to selected Trip Unit to enable it to accept calibration current.

j iB145I4(CahbhtNo[mian{ _7_ Sum of stable and transient calibration current to selected Trip Unit TB14;15_ Calybration Current 7 __ _

TB1416 Trip Status 8 0 or 12 Vdc logic Ic.cl from Trip Unit selected. Latches trip current display on Readout Assembly.

I TB14;17Jalibrate Command 8 24 Vdc signal to selected Trip Unit to enable it to accept calibration current.

TB14-18 Cahbration Current 8 Sum of stable and transient calibration current to selected Trip _ Unit.

TB14-19 Trip Status. 9 0 or 12 Vdc logic level from Trip Unit selected. Latches trip current display on Re iMut Assembly.

9 24 Vdc signal to selected Trip Unit to enable it to accept calibration current.

T B14-20hlibrate Command Sum of stable and transient calibration current to selected Trip Unit.

TB14 21 Calibration Current 9 TB14-22 Trip Status 10 0 or 12 Vdc logic level from Trip Unit selected. Latches trip current display on Readout Assembly.

TB14d3 Calibrate Command 10 24 Vdc signal to selected Trip Unit to enable it to accept calibration current.

TB14-24 Calibration Current 10 Sum of stable and transient calibration current to selected Trip Unit.

TB14-25 Trip Status 11 0 or 12 Vdc logic level from Trip Unit selected. Latches trip current display on Readout Assembly. ,

24 Vdc signal to selected _T_ rip Unit to enable it to accept calibration current. l TB1412 iiI~Caiibrate Command 11 TB14-27 Calibration Current 11 Sum of stable and transient < aiibraton current to selected Trip Unit.

TB14 28 Trip Status - 12 0 or 12 Vdc logic level from Trip Unit selected. Latches trip current display on Readout Assembly.

31

• I e-Customer Wiring shnuld be locited m the vicinity of the transmitter (s) so that the resistance of the were used to make connections interconnections between Master Trip Units and Slave between the 710DU System and transmitters does not Trip Units must be made by the customer at termina: 12 exceed 16 ohms.

of the Trip Units involved. In addition, for proper opera.

tion it is important that terminal 4 of each Trio Unit be Readout Assembly Interface -

connected as shown in rigure 25.

A biind mated DA-15 connector pair provides the elec-The customer also it respw Jble for installing all wiring trical interface between the Calibration Unit and Readout to transmitters, relays, powe supplies, meters, recorders, Assembly.The pins are numbered on the Readout Assem-alarms, or any other instrumentation used with the 71000 bly connector as shown in Table 14.

System. Shielded cables must be used when connecting transmitters to the Card File, with the shield connected to TABLE 14 the chassis (terminal 1 of each terminal bar) at the Card MATING CONNECTOR PIN DESIGNATIONS File. Shielded cables also should be used for auxiliary Readout Assembly analog outputs.

" " *9"* "

The Card Filo winng connections may be bare stnpped wire, or enmp on spado, or ring tongue terminals. 1 Chassis ground For further information on wiring, refer to the applicable Rosemount Specification Control Drawing. Figures 25, 3 Display engaged 26, and 27 show sample interconnections.

4 +24 Vdc power return Figure 25 illustrates an application of the 710DU System 5 Calibration current return where pressure transmitters are powered from the same 6 Calibration current power supply as the Master Trip Units. Four-wire trans-mitters can be used if the transmitter signalis fed to the 7 Trip status output Master Trip Unit on terminals 15 and 4. The diagram als 8 Transient blanking shows how to interconnect Master Trip Units and Slave Trip Units to obtain multiple trip points from a single 9 No connection transmitter input.

10 No connection The system shown in Figure 26 includes a transmitter, 11 No connection power supplies, relays, and a 710DU Master Trip Unit.

12 No connection A retrofit of an existing power plant with the 710DU 12 No con.1ection '

Tris / Calibration System is illustrated in Figure 27. lne 13 No connection diagram shows what must be done to install the 710DU 1

System and accompanying instrumentation in place of 14 No connection an existing pressure switch. The cabinet (relay rack) 15 No connection housing the 7100U System, power supplies, and relays INSTALLATION Card File adjustments and, if used, must be supplied ' by the customer.

The Card File mounts in a standard 19-inch relay rack, along with the power supplies and relays used with the Master and Slave Trip Units 710DU Trip / Calibration System. Th6 relay rack, power supplies, and relays are selected and wplied by the Master and Slave Trip Units are installed in the first 12 customer. Card File locations (left to right as viewed from the front of the Card File). Each Trip Unit slides into the Card File The Card File has center mounting screw slots which along an upper and a lower nylon card guide, and plugs are not required for support of the Card File in the relay into a single-sided edge card connector at the rear of the rack, but which can be used to mount an optional Card File. The Tnp Unit is held in place by two captive tamper-proof bar over the Master and Slave Trip Units. screws which engage the upper and lower rails of the

• The bar guards againstinadvertent alteration of trip point Card File.

32

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{RlP UNIT CABINE T Figure 26. Sample Transmitter and Master Trip Unit interconnection Diagram.

33 i

Calibration Unit Readout Assembly Only the Calibration Unit can be installed in Card File The Readout Assembly slides into the Calibration Unit location 13 (far right) because of the different alignment through a spring loaded door, with electncal connection

. of the card guide and connectors. The Calibration Unit rnacc inrough the blind mated DA 15 connector pair slides into the Card File along two upper and two lower ' discussed previousty. Since the Readout Assembly is nylon card guides, and plugs into two edge card con- portable,it can be transferred easily to any other Cali-nectors - one single-siJed and the other double-tided bration Unit in the 7100U Trip / Calibration System.

- at the rear of the Card Fle. Two front panel captive screws ho;d the Calibration Unit in place in the Card File.

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' 34 l

SECTION VI CALIBRATION AND OPERATION CENERAL The wiring and installatioa steps presented in Section V ing and instaflation, but must be L:complished before ruust be completed before pesforming the procedures the 7100U Trip / Calibration System is put into operation, The frequency of calibration after the 71000 System is discussed .:' this section.

operative is determined by customer requirements and Cahbration need not be performed immediately after wir- specificahons.

CALtBRATION

c. Turn the stable current amplitude adjustment to its Installation and checkout procedures below must be maximum position (full clockwise).

performed before the 710DU Trip / Calibration system is calibrated. Some can be completed in an assembly area where the eiemats of a 7100U System are unpacked, d. Make sure the transient current amplitude adjust-tssembled, and briefly checked for proper operation. ment is disengaged (pulled out).

Other proce62res should be performed after the 710DU

e. Turn the Calibration Unit power switch ON.

System is moved to its final operating area.

f. Using the two-part calibration select and com-mand switch on the front of the Calibration Unit, select a Master Trip Unit and apply stable cali-Assembly Area bration current to that Trip Unit by pushing in the center knob of the switch. If the trip status LED on

1. Install the Card File, power supphes, and relays in the the Master Tnp Um was off,it should turn on;if it relay rack (cabinet).

was on,it should go off. The analog meter should

2. Insert the Master and Slave Trip Units and Calibration be close to full scale.

Unit into the Card File, making electrical connections

g. Repeat this checkout procedure for all Master Trip with the edge card connectors at the rear of the Card Units, including those driving Stsve Trip Units.

File. Tighten the two captive screws on the front panel Check the trip status LED's to see if they are off or of each Unit.

on, as applicable.

3. Complete the electrical interface between Master Trip Units and Slave Tnp Units by connect:ng terminals 12 Final Operating Area and 4 of the Master (s) to terminals 12 and 4 of the 1. Locate the cabinet containing the 710DU System, appropriate Slave (s), respectively.

power supplies, and relays in the final operatang area.

4. Wire the power supply and re!ays to the Card File (see

2. Connect the input sensors to the appropriate Master Tables 12 and 13.Section V).

Trip Units in the Card File (see Table 12.Section V).

5 Cor' duct the following brief functional test to ensure

3. Connect the appropriate loads to ther relays.

that the power supply and Trip Units are properly connected, trip and gross failure actions are occur-NOTE: Control functions which might be initiated nng, and nothing was damaged in shipment.

dunng cahbration should not be connected until after

a. Make sure the Calibration Unit power switch is Trip Un ? Cshtration.

OFF.

4. Connect the 24 Vdc power supply to the appropriate ac power.

b. Apply 24 Vdc power to the Card File. All gross failure lights on the Trip Units should be lighted

- since the Card File is not connected to anv input S. Apply 24 Vdc power and proceed to calibrate tnp points of Master and Slave Trip Units.

sensors.

35

Calibration of M:sc Trip Units (4 20 mA Input) 11. Using th3 stable current amplituoe adjustment, set the lower display of the Readout Assembly to the

1. Each Master Trip Unit to be calibrated must be desired trip point at either the high side or low side removed from the Card File and the following adjust. of the reset differential (shown in Figure 8).

ments verified or set (see Figure 8. Section 111).

12. If the trip point is to be set ;t the high side of the U

a. Trip output logic reset differential, the Master Trip Unit trip status

b. Trip status out?ut/t EO logic . LED initially should be ot/. If it is on, turn the trip point adjustment potentiometer clockwise until the

c. Reset differential LED goes off. Then turn the potentiometer counter-clocMse unM me E just comes on.

d. High current gross failure trip point

. e. Low current gross failure trip point 13. If the trip point is to be set at the low side of the reset differential, the Master. Trip Unit trip status LED

f. Frequency response of auxiliary analog output mitially should be on. If it is off, turn the tnp point adjustment potentiomete/ counterclockwise until the

2. Reinsert the 4-20 mA Master Trip Unit in the Card LED comes on. Then turn the potentiometer clock-File after adjustments (a: inrough (f) above have wise until the LED just goec off.

been made or checked.

14. Run the stable calibration current through the trip i 3. Venfy that 24 Vdc power is applied. point to venfy the reset differer.tial. Observe at what value the upper display on the Readout Assembly

4. Install the Rea'dout Assembly in the Calibration Unit. latches (tnp status LED on Readout Asserr.bly la lighted for latched cond:'. ion). The trip current dis-S. Make sure both the two-part calibration select and play reset button on the Readout Assembly must be command switch and the transient current amplitude reset if the trip point is to be checked for calibration adjustment are disengaged (center knob of switch current changing in the opposite direction; i.e., in-and transient adjustment pulled out). creasing current vs. decreasing current, or decreas-ing current vs. increasing current.

6. Turn the Calibration Unit power switch ON. The switch controls power to both the Calibration Unit 15. If it is necessary to readjust the reset differential, s and Readout Assembly. repeat steps 11 through 14.

7. Allow the Readout Assembly approximately 10 16. If the reset differential has not been readjusted, minutes warm-up time. check the trip point (either the high side or low side of the reset differential as required by application) to '

8. Usi.ig the calibration c@ct and command switch, venfy that it is the correct value.

Select the Card File location of the Master Trip Unit to be calibrated (both the outer and center knobs 17. If the trip point neet's adjusting, repeat steps 11 and should be pointing at the same number). 12 or 11 and 13, as appropriate.

9. Push in the center knob of the two-part switch to 18. If the tnp point is correct, the Master Trip Unit is activate the Calibration Unit. ready for operation.

l

10. The gross failure output on the Master Trip Unit LED Action for:

. should provide a 24 Vdc output and the calibration Reversed Trip Output logic and status LED on the Calibration Unit should light' Normat Trip Status Output Logic

~

indicating that calibration is occurr'.ng.

or Normal Trip Output I ogic and NOTE' Complete steps 11 mrough 18 and 27 or 19 l Reversed Trip Status Output Logic through 27 according to the logic selected.

19. Using the stable current amplitude adjustment, set

the lower display of the Readout Assembly to the l- Normal Trip Output logic and desired trip point at either the high side er low side of l Normal Trip Status Output Logic the reset differential (see Figure 28).

Reversed Trip Output Logic and 20. If the trip point is to be set at the high side of the reset Reversed Trip Status Output logic differential, the Master Trip Unit trip status LED 36 l

[

o initsilly should be on. If it is off, turn the trip point C:libration cf Me:ter Trip Unita (RTD input)

' adjustment potentiometer clockwise until the LED comes on. Then turn the potentiometer counter. 1. Each Master Trip Ur.it to be calibrated must be clockwise until the LED just goes off. removed from the Card File and the following adjust-ments verified or set (see Figure 9.Section III).

2* " a. Trip output logic

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b. Trip status output / LED logic

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TR ANSMITTE R CuRRE NT (mA)

f. Linearity adjustment (set for desired span).

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2. Install the RTD input Trip Unit on the Card Extender.

Figure 28. High Side and low Side of Reset and insert the Card Extender irato the Card File.

Differential.

21. If the trip point is to be set at the low side of the reset

. differential, the Master Trip Unit trip status LED a. Connect a 999'.99 ohm decade box to terminal pins initially should be off, if it is on, turn the trip point 14,15. & 4 as shown in Figure 29 adjustment potentiometer counterclockwise until the LED goes off.Then turn the potentiometer clockwise g until the LED just comes on. length'to reduce errors.

' 22. Run the' stable calibration current through t*e trip point to verify the reset differential. Observe at what value the upper display on the Readout Assembly p-_____) p____q latches (trip status LED on Readout Assembly is g

: ,. g 7

lighted for latched condition). The trip current display l l l l

reset button on the Readout Assembly must be reset l l l Rr Tl

-if the trip point is to be checked for calibration l oox l j l V l

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I current changing in the opposite direction; i.e., in- ' d I creasing current vs. decreasing current, or decreas- ,

ing current vs. increasing current. i__ __d I _ .)

.23. If it is necessary to readjust the reset differential, repeat steps 19 through 22. Figure 29. Decade Box Connection.

24. If the reset differential has not been readjusted, b. Install a voltmeter in J1 on the front panel of the check the trip point (either the high side or low side RTD input Trip Unit, referencing the voltmeter to of the reset differential as required by application) to J2 on the Calibration Unit. Venfy that 24 Vdc is verify that it is the correct value. applied. Verify linearity adjustment.

' 25. If the trip point needs adjusting, repeat steps 19 and c. Set the decade box resistance to tne desired zero 20 or 19 and 21, as appropriate. point of the input temperature range.

~ 26. If the trip point is correct, the Master Trip Unit is d. Adjust the "zero" potentiometer (R86) so that the ready for operation. . voltage at J1 reads 1.000 001 Vdc.

27. After all Trip Units have been calibrated, disengage . e. Set the decade box resistance to the desired full calibration by pulling out the center knob of the scale point of the input temperature range.

calibration select and command switch, and turning.

both knobs of the switch to OFF. Turn power switch f. Adjust the " span" potentiometer (R81) so that the to OFF. voltage at J1 reads 5.000 t .001 Vdc.

37

- . _ . _ ~

g. Rrpett stIps c-f until both "ztro" and " spin" NOTE: Uniiss othrwise sndicated, all swetches or dis-settings can be achieved without adjusting R86'or plays called out in these procedures are located on the R81. front of the Bench Test Facility.

I

h. Check the linearity of the output at %, %, and %

of span. Readjust the linearity and repeat steps c-f PRELIMINARY ADJUSTMENTS until linearity values are acceptable.

ns aH me ham Asn% M N Bend M

1. Reinst2 RTD input Trip Unit in the Card File. Facility slot labeled AC11VE.

Continue with steps 3 through 27 of the Calibration of 2. Apply power by puswg the POWER switch. Check Master Trip Units (4-20 mA fnput) Section. the DISPLAY ENGAGED LED to determine if the Readout Assembly is properly connected (LED ,

Calibration of Slave Trip Units should be lighted).

- 1. Complete steps 1 through 7 of the calibration pro- 3. Set VOLTAGE switch to 24 0 Vdc.

cedure for Master Trip Units. Note that there will be no frequency response adjustment of the auxiliary analog 4. Set TRANSIENT BLANKING and TRIP STATUS <

output (part f of step 1). switches to the OFF position. If required, press the trip current display reset on the Readout Assembly

2. Turn the outer knob of the two-part calibration select so the trip status LED is off.

and command switch to the Card File location number of the Slave Trip Unit whose trip point is to be verified 5. Set the 10011 SHUNT swxh to the IN position.

or calibrated. Turn the center knob of the switch to the location number of the Master Trip Unit driving the 6. Connect the DVM across the 100-ohm shunt resistor Slave Trip Unit. to measure the current supplied to the Readout Assembly.

3. Repeat steps 9 through 27 of the Master Trip Unit calibration procedure. Note that the LED logic for trip 7. Set the CURRENT R ANGE SELECTOR mADC switch output Ingic and tnp status output logic is the same for at the 0-10 mA rang and adjust the CAL CURRENT Master and Slave Trip Units. FINE ADJUST knob until the DVM reads 1.00 mV. s Calibration of Readout Assembly 8. Turn the zero adjust potentiometer on the Readout Assembly (see Figure 11. Section Ill) until either

- To calibrate the 710DU Readout Assembly,the following display reads 0.01 mA.

' equipment is required:

9. Set the CURRENT RANGE SELECTOR mADC switch

1. Bench Test Facility, desigrad by Rosemount Inc., for at the 18-28 mA range, and adjust the CAL CUR-710DU Sy'. tem calibration and testing. Refer b Bench RENT FINE ADJUST knob until the DVM reads 2.000 Test Facility Manual 4471-3. Vdc.

10. Turn the span adjust potentiometer on the Readout

. 2. Digital Voltmeter (DVM), including leads to mate with the 100-ohm resistor test jacks on the front of the Assembly (see Figure 11. Section fil) until either Bench Test Facility. Since the DVM is used for a display reads 20.00 mA.

precise measurement of the current displayed on the Readout Assembly, calibration accuracy of the 710DU PRECISE ADJUSTMENTS System is dependent on DVM accuracy. The DVM input impedance should not be less than 10 11. Set the CURRENT RANGE SELECTOR mADC switch at the 0-10 mA range, and adjust the CAL CURRENT megohms.

FINE ADJUST knob until the DVM reads 0.400 Vdc.

Steps 1 through 10 of the calibration procedures are

12. Turn the *2ero adjust potentiometer (Figure 11, Sec-preliminary adjustments and provide for an approximate calibration of the Readout Assembly. Precise calibration tion lil) until the Readout Assembly reads 4.00 mA.

procedures over the 4.00 to 20.00 mA range are included in steps 11 through 16. It is important to calibrate tPm 13. Set the CURRENT RANGE SELECTOR mADC Readout Assembly with end points at 4.00 and 20.00 mA switch at the 18-28 mA range, and adjust the CAL to minimize trip point errors over the 4.00 to 20.00 mA CURRENT FINE ADJUST knob until the DVM reads calibration range. 2.000 Vdc.

38

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t e

14. Turn tha span adjust potsntiomittr (Figure 11. Sic- 1. Whzn the TRANSIENT BLANKING switch on the tion lii) until the Readout Assembly reads 20.00 mA. Bench Test Facility is turned ON. the upper display of the Readout Assembly should be blanked out.

15. Because the zero adjustment has a rmallinteraction with the span adjustment, it may be necessary to 2. W.th the trip status LED on the Readout Assembly off, repeat steps 11 through 14 until the Readout As- turn the TRIP STATUS switch on the Bench Test sembly exactly indicates 4.00 mA and 20.00 mA Facility to ON to verify that the LED is operational when the DVM indicates C.400 Vdc and 2.000 Vdc. (shou,ld light). At the same *"ne, the current supplied to respectively. the Readout Assembly can be changed to verify that the upper display is latched.

16. The Readout Asic.mbly is now properly calibrated to minimize errors over the 4.00 to 20 00 mA range. More details on bench testing can be found in Bench Additional points over a O to 46 mA range may be Test Facility Manual 4471-3 checked by the customer as desired. By changing the VOLTAGE switch on the Bench Test Facilay, the OPERATION accuracy of the Readout Assembly can be verified for opera' ion at 23.5 Vdc and 26.5 Vdc. After the 710DU Trio / Calibration System has been properly calibrated. connect the loads which were not TRANSIEM BLANKING AND TRIP STATUS connected prior to calibration. The 7100U System then is ready for operation. Operational procedures may vary, in addition to calibration, the Bench Test Facility can be depending on the application.

used to check the transient blanking and trip status functions of the Readout Assembly. No scheduled maintenance is required for the 7100U System.

39

e SECTION Vil 4

ACCESSORY HARDWARE GENERAL The 710DU Trip /Calibra%n System msy use any or all While not required for system operation, the optional of the accessory ha dware described in this section. equipment serves the ft.nctions discussed below.

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BLANK PANELS Blank panets are availabic to cover unused Card File maintain seismic qualification, keep foreign material from locations for Master and Slave Trip Units (1 through 12), gettng into unused Card File locations, and protect and the Calibration Unit (13). The panels are required to adjacent Tr.p Units.

710DU CARD EXTENDERS Card Extenders are available for Master and Slave Trip circuit card assemblies used for testing and troubleshoot-Units, the Calibration Unit, and Readout Assembly. Table ing Master or Slave Trip Units and the Cal.bration Unit.

The Card Extenders bnng electncal connections of these 15 lists the dirNnsions of the Card Extenders.

Units to the front of the Card File as shown in Figures 30 Trip Unit and Calibration Unit Card Extenders and 31.

The Trip Unit and Calibration Unit Card Extenders are TABLE 15 CARD EXTENDER DIMENSIONS Height Width Depth inches Centimeters Inches Centimeters Inches Centimeters Card Extender 17.70 31/32 2.46 17-3/32 43.42 Trip Unit 6-31/32 17.70 2-3/8 6.03 18-27/32 47.86 Calibration Unit 6-31/32 2-5/32 5.48 14 a /2 36 83 Readout Assembly 2-23/32 6.91 i

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Figure 30. Application of 7f ODU Trip Unit Card Extender.

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Note: This is a substitute photograph. The Model 710DU is painted black.

Figure 31. Application of 710DU Cahbration Unit Card Extt nder.

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'i Note: This is a substituto photograph. The Model 7100U is painted black.

J Figure 32. Application of 710DU Readout Assernbly Card Extender.

42

a Both types of Ctrd Ext;ndtrs slida into ths Cud F;is, 7. Linstrity adjustment (RTD Input MIstar Trip Units).

plug into the rear edge card connectors, and interface with Trip Units or Calibration Units, as applicable,

8. "Zero" adjustment (RTD input Master Trip Units),

through a mating connector.

9. " Span" adjustment (RTD input Master Trip Units).

In addition to providing test jacks for troubleshooting, the Trip Unit Card Extender makes the following adjustments The Calibration Unit Card Extender brings the terminals Desily accessible on Mas,er or Slave Top Unit circuit card of TB13 and TB14 (see Table 13 Section V) to the front of assembliec, the Ce/ibration Unit. Test jacks on the Card Extender are used for troubleshooting or external test cquipment.

1. Reset differential Readout Assembly Card Extender

2. High gross failure tnp cnent The Readout Assembly Card Extender plugs into tne

3. Low gross failure trip current Calibration Unit, making electrical connections for the Readout Assembly accessible from the front of the Card

4. Trip outputlogic File.

5. Trip status output / LED logic' Like the other Card Extenders, the Readout Assembly Card Extender has test jacks and is used for trouble-

. 6. Frequency response of auxiliary analog output (Mas- shooting or connecting external test equipment. Figure ter Trip Units,4-20 mA Input). 32 illustrates its use.

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0 SECTION Vill GLOSSARY The Glossary @nes terms associated with the 710DU usage. Those terms in italics in the descriptions are Tnp/ Calibration Systen and not found in common defined elsewhere in the Glossary.

Analog Output to Slave - A continuous voltage signal Normal Trip Output Logic - it provides a high (24 Vdc) corresponding to an input sensor signal. it is generated by trip output when the transmitter current or analog output Master Trip Units and used to drive Slave Trip Units. to Slave is greater than the trip point.

Auxiliary Analog Output- a continuous voltage signal Normal Trip Status Logic - Trip status output is high corresponding to an bput sensor signal. it is generated by (+12 Vdc) and the trip LED on the front panel is ON when Master Trip Units, has an adjustable frequency response, trip output is high (+24 Vdc). Trip status output is low (0 and is used to drive external recording or monitoring Vdc) and the trip LED on the front panelis OFF when trip equipment. output is low (O Vdc).

Reset Differential - The difference between the Inp Calibrate Command - A voltage signal generated by the Cahbration Unit. It activates a relay in Master Trip Units point for an increasing input sensor signal and the trip to replace transmitter current with calibration current. point for a decreasing input sensor signal.

Calibration Current - A precisely measured current Reversed Trip Output Logic - It provides a low (O Vdc) supplied by the Calibration Unit to a Master Trip Unit for trip output when the transm rier current or analog output verifying or calibrating the trip point. It can be stable to Slave is greater than the trip point.

calibration current only, or stable current that has tran-sient calibration current added to or subtracted from it. Reversed Trip Status Logic - Trip status output is high

(+12 Vdc) and the trip LED on the front panelis ON when Calibrate Mode - A state of operation when a inp unit the trip output is low (O Vdc). Trip status output is low (0 receives calibration current from the Calibration Unit for Vdc) and the trip LED on the front panelis OFF when trip verification or calibration of the trip point. output is high (+24 Vdc). s Gross Failure - An input sensor signal failure detected Slave Trip Unit - A top unit which receives a.n analog by a Master Trip Unit when the input sensor signal is voltage signal from a Master Tnp Unit. It provides a trip outside of preset high or low limits. Through the analog output and a gross failure output.

output to Slave sigrms. the Slave Top Unit also can indicate a gross failure. Stable Calibration Current - An adjustable current with a limited slew rate. It is used to calibrate trip points on Gross Failure Output - A voltage signal provided by a trip units.

Inp unit whenever a gross failure occurs.

Transient Blanking Signal- A voltage signal generated High Side of Roset Differential - The inp point for an in the Calibration Unit used to blank the upper display on increasing input sensor signal. the Readout Assembly when transient Calibration cur-rent is applied.

Logic Level 0 - A stabIe output which corresponds to approximately 0 Vdc. Transient Calibration Current - An adjustable current with a fast rise time. It is added to or subtracted from .

Logic Level 1 - A stable output which corresponds to stable calibration current for time response mea-approximately 24 Vdc. (The exception to this is the trip surements.

status output which corresponds to approximately 12 Vdc). Transient Trigger Signal- A fast rise time voltage signal (accessible through a test jack J1, red) used to trigger an Low Side of Roset Differential - The trip point for a oscilloscope for time response measurements.

decreasing input sensor signal.

Trip Action - The change in the trip output which Master Trip Unit - A trip unit which receives an input occurs when the input sensor signal or analog output to signal from a remote sensor. It provides a trip output, a Slave passes through the tnp point.

gross failure output, and two analog signals.

44

8 a

Trip Cutput - A voltags signal with riv2rsibla logic . upper dispiry of tha Readout Assimbly.

provided by trip units when the input sensor signal or analog output to Slave passes through the trip point. Trip Unit -- An electronic assembly which provides a tnp output and a gross failuro output from signals gcnerated Trip Point - The value of the input sensor signal or the by transmitters, RTDs, or other trip units. The outputs can analog outputis Slave whers the trip action occurs. dive relays and external equipment. All Tnp Uruts in the 71600 System have adjustments for high and low gross j Trip Status LED - A light-ean;tting diode with reversible failure output, top point, and reset differential. t logic to indicate whers the inp status outputis high (12 Vdc). Window Pulse - A logic signal generated in the Readout Assembly which determines how many clock-pulses are Trip Status Output - A voltage signal with reversible ' counted when cahbration current is converted to a logic ueed during calibration to latch the trip point on the digital signal for display on the Readout Assembly.

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