J-3645-2 RTD Termination Panel
Contents
1. OS 2 Adjust the gain potentiometer so that total bridge voltage is 256 3mV across the 100 ohm resistor The gain potentiometers are located at the back of the panel Each channel has a separate gain adjustment labeled GN 3 2 3 4 3 Force the RTD to a known temperature or simulate a known temperature by connecting a precision resistor at the RTD end of the field wiring For example if R 182 0 ohms then look up in the table in Appendix B the resistor values above and below 182 0 ohms With these values and their equivalent temperatures interpolate to find the expected temperature Deg C OHMS 210 179 51 X 182 0 220 183 17 X 216 80 deg C 4 Adjustthe linearity potentiometer for the corresponding simulated temperature The temperature should be at the upper end of the operating range and must be well away from 0 deg C The linearity potentiometers are located at the back of the panel Each channel has a separate linearity adjustment labeled LI Panel Replacement Use the following procedure to replace a termination panel Step 1 off power to the rack and all connections Step 2 Use a screwdriver to loosen the screws holding the field wires to the termination panel Make certain that the wires are tagged so that they can be replaced in the correct order Step 3 Remove the 50 pin flat cables from the back of the termination panel Step 4 Remove the termination panel Step 5 Follow2. 4th arm of a bridge The termination panel contains the internal portions of the bridge as well as the bridge excitation supply See figure 2 2 2 1 SENSE LOW PART OF INTERFACE HIGH R GND CABLE REF RANGE SHIELD Figure 2 2 Typical Input Circuit A three wire connection to each RTD allows the effects of lead resistance up to 5 ohms per lead to be compensated out A separate shield connection is also provided The shield is grounded at the termination panel The supply for each bridge is modified by the output of a linearizing amplifier to compensate for both bridge and RTD nonlinearities Three potentiometers are included for each channel to adjust offset range and linearity Nominal full scale is 200 mVolts for a 200 deg C span or 100mVolts depending upon how the panel is calibrated 2 2 3 0 INSTALLATION This section describes how to install and remove the termination panel and its cable assembly 3 1 Wiring The installation of wiring should conform to all applicable codes To reduce the possibility of electrical noise interfering with the proper operation of the control system exercise care when installing the wiring from the system to the external devices For detailed recommendations refer to IEEE 518 3 2 Initial Installation WARNING THERE IS NO ISOLATION BETWEEN THE INDIVIDUAL CHANNELS ON THE TERMINATION PANEL DO NOT CONNECT DIFFERENT CHANNELS ON THE SAME TERMINATION PANEL TO COMMON POINTS O
3. F DIFFERENT POTENTIALS FOR EXAMPLE THIS PANEL SHOULD NOT BE CONNECTED TO RTD DEVICES USED TO MONITOR MOTOR TEMPERATURES BECAUSE THE RTD DEVICES WILL FLUCTUATE IN COMMON MODE VOLTAGE LEVEL BETWEEN THE DIFFERENT MOTORS FAILURE TO OBSERVE THIS PRECAUTION MAY DESTROY THE TERMINATION PANEL DUE TO EXCESSIVE CURRENTS FLOWING IN THE COMMON WIRING Use the following procedure to install the module Step 1 Turn off power to the system All power to the rack as well as all power to the wiring leading to the termination panel should be off Step 2 Mount the termination panel It should be mounted to permit easy access to the screw terminals on the terminal board Make certain that the terminal board is close enough to the rack so that the cable will reach between the terminal board and the module The panel should be located so that the flat cables can be routed to the front of the module without coming in contact with high voltage wires Step 3 Mount the external power supply It must be located within a 6 ft cable run of the termination panel It should be located so that the power cable can be routed to the termination panel without coming in contact with high voltage wires Step 4 Connect the power cable on the termination panel to the power supply Step 5 Fasten field wires to the terminal strip Make certain that all field wires are securely fastened The shield should be terminated at the panel Do not connect the shield at
4. RTD Termination Panel M N 61C615 Instruction Manual J 3645 2 ae ELECTRIC ELI The information in this user s manual is subject to change without notice Reliance Electric Industrial Company assumes no responsibility for errors that may appear in this user s manual WARNING THIS UNIT AND ITS ASSOCIATED EQUIPMENT MUST BE INSTALLED ADJUSTED AND MAINTAINED BY QUALIFIED PERSONNEL WHO ARE FAMILIAR WITH THE CONSTRUCTION AND OPERATION OF ALL EQUIPMENT IN THE SYSTEM AND THE POTENTIAL HAZARDS INVOLVED FAILURE TO OBSERVE THESE PRECAUTIONS COULD RESULT IN BODILY INJURY WARNING INSERTING OR REMOVING THIS MODULE OR ITS CONNECTING CABLES MAY RESULT IN UNEXPECTED MACHINE MOVEMENT TURN OFF POWER TO THE MACHINE BEFORE INSERTING OR REMOVING THE UNIT OR ITS CONNECTING CABLES FAILURE TO OBSERVE THESE PRECAUTIONS COULD RESULT IN BODILY INJURY Reliance is a registered trademark of Reliance Electric Industrial Company AutoMate is a registered trademark of Reliance Electric Industrial Company 1 0 2 0 3 0 4 0 Table of Contents Introduction ira Ee ROCA a ER CR 1 1 Mechanical Electrical Description 2 1 2 1 Mechanical Description 2 1 2 2 Electrical Description ore ree eren 2 1 Installation cocos ciar een 3 1 31 WING e Re RRA A 3 1 3 2 Initial Installation rre mmy eme 3 1 8 8 Field Calibration EO P ERE x 3 2 3 4 Panel Rep
5. both ends of the cable Typical field signal connections are shown in figure 3 1 3 1 SENSE LOWO LOW R N JE HIGH R GND e SHIELD Figure 3 1 Typical Field Signal Connections Step 6 Connect the 50 pin flat cables to their corresponding connector on the analog input module 61C613 Attach the cables by aligning the triangle marks on the cable end and the board socket Input channels 0 7 TB1 use the middle connector on the input module Input channels 8 15 TB2 use the bottom connector If the rack contains more than one analog input module make certain that the connectors are the proper ones for this module Step 7 on power to the system Step 8 Verify the installation Refer to the instruction manual for the 16 Channel Analog Input Module J 3613 1 3 3 Field Calibration The termination panel is adjusted for European curve RTDs alpha temperature coefficient of 0 00385 ohms ohm degree C and includes an allowance for 0 1 ohm lead resistance For lead resistance greater than 0 1 ohm the following procedure can be used to calibrate the input for maximum accuracy 1 The offset adjustment should not normally need further field adjustment If it becomes necessary substitute a precision 100 ohm resistor in place of the RTD and adjust the offset potentiometer for an output of zero volts The offset potentiometers are located at the back of the panel Each channel has a separate offset adjustment labeled
6. lacement EL ER ER ERE ERO 3 3 Diagnostics and Troubleshooting 4 1 Appendices Appendix A Technical Specifications sede iR DIRIGE Td A 1 Appendix B Platinum RTD Temperature Resistance Values European Curve B 1 Appendix C Field Connections cn bi pri pegas EROS C 1 Appendix D Related Components xri eR ERR aed D 1 Figure 2 1 Figure 2 2 Figure 3 1 List of Figures 61C615 Termination Panel Typical Input Circuit Typical Field Signal Connections 1 0 INTRODUCTION The 61C615 is an active termination panel that conditions and powers 100 ohm platinum Resistance Temperature Detectors used with the 61C613 analog input module Four input screw terminals are provided for each 3 wire RTD A 4th terminal is used to connect the RTD shield to a common ground This manual describes the functions and specifications of the panel It also describes how to install set up and service the panel Related publications that may be of interest J 2605 AUTOMATE 30 40 PRODUCT SUMMARY J 2611 DCS 5000 PRODUCT SUMMARY J 3613 1 16 CHANNEL ANALOG INPUT MODULE INSTRUCTION MANUAL IEEE 518 GUIDE FOR THE INSTALLATION OF ELECTRICAL EQUIPMENT TO MINIMIZE ELECTRICAL NOISE INPUTS TO CONTROLLERS FROM EXTERNAL SOURCES 1 1 2 0 2 1 MECHANICAL ELECTRICAL DESCRIPTION The following is a description of the ter
7. lication J 3645 2 January 1991 Copyright 2002 Rockwell Automation Inc All rights reserved Printed in U S A
8. mination connectors and electrical characteristics of the field connections Mechanical Description The 61C615 is a 19 rack mountable termination panel that includes two 6 foot 50 wire twisted pair flat cables and a 6 foot power cable A separately mounted 15 volt power supply is provided by the user Refer to figure 2 1 Panel dimensions are listed in Appendix A When the panel is viewed from the front the flat cable on the right side of the termination panel TB2 is for analog inputs 8 15 It connects to the bottom connector on the 61C613 The flat cable on the left side of the termination panel TB1 is for analog inputs 0 7 It connects to the middle connector on the 61C613 The top connector on the 61C613 module is not used The termination panel includes 64 clamp type screw terminals for terminating field signals A clear plastic shield is provided as a cover for the terminal strips d RELIANCE RELIANCE ELECTRIC 7 ELECTRIC ES Es 2 2 Figure 2 1 61C615 Termination Panel Electrical Description The RTD termination panel is used to linearize and power 100 ohm platinum Resistance Temperature Detectors used with the 61C613 analog input module The resistance change of the RTD with temperature is sensed by using the RTD as the external
9. steps 2 6 in the installation procedure section 3 2 3 3 40 DIAGNOSTICS AND TROUBLESHOOTING For details on how to troubleshoot the termination panel refer to the instruction manual for the 16 Channel Analog Input Module J 3613 1 4 1 Appendix A Technical Specifications Ambient Conditions Storage temperature 40 C 85 C e Operating temperature 0 C 55 C e Humidity 5 90 non condensing Dimensions Height 1 7 inches e Width 19 0 inches Depth 1 6 inches behind rack rails 2 5 inches in front of rack rails Input Circuit e Number of inputs 16 100 ohm 0 degrees C platinum Resistance curve European Alpha 0 00385 ohms ohm deg C Isolation All channels on panel have a common ground Entire panel may operate at non zero common mode voltage depending on input board common mode range and power supply isolation Connections Screw activated clamp type barrier strips Accomodates 24 to 14 AWG wire Four connections RTD Output Circuit Linearized range 20 to 250 deg C e Sensitivity 5mVolt deg C e Zero point 0 deg C e Linearization error for 0 1 ohm lead resistance 0 1 deg C 20 to 250 deg C for 0 1 to 0 2 ohm resistance 0 196 reading 0 1 deg C 20 to 250 deg C or lt 25 deg C 20 to 200 deg C Temperature variation 0 55 deg C 0 596 of reading 0 2mVolts max Connections 50 wire twisted pair flat cable per 8 channels 6 f
10. t long One end hardwired into panel other end terminated in a connector 3M part no 3425 6050 A 1 Appendix A Continued Power Requirements 15 Volts 100 mA 15 Volts 160 mA Voltage tolerance 1 Voltage temp Coef 0 02 deg C e Line regulation 0 196 Load regulation 0 196 e Ripple 2 mVolts RMS e Protection Each line fused at 1A and reverse voltage protected Fuse type Littelfuse 276001 Connector 3 wire cable 6 ft long with spad lugs 15 Volts yellow 15 Volts violet ground gray WARNING UNUSED INPUTS SHOULD BE CLOSED OPEN INPUTS CAN CAUSE 15V CURRENT TO INCREASE BY 15MA PER CHANNEL AND 15V CURRENT TO INCREASE BY 10MA PER CHANNEL JUMPER SENSE TO HIGH R GROUND AT ALL UNUSED INPUTS FAILURE TO OBSERVE THIS PRECAUTION COULD RESULT IN BODILY INJURY OR DAMAGE TO EQUIPMENT A 2 Appendix B Platinum RTD Temperature Resistance Values European Curve Alpha 0 00385 ohms ohm deg C 6425 240 19046 s 2 19408 20130 0 aso 22266 60 12324 246 80 13089 25050 90 13470 420 25393 B 1 Appendix C Field Connections TB1 TB2 Channel Input i Channel 2 2 2 2 3 3 3 3 4 4 4 4 5 5 5 5 6 6 6 6 7 7 7 7 Shield High R Low R Sense Shield High R Low R Sense R resistance no connection Input Shield High R Lo
11. w R Sense Shield High R Low R Sense C 1 Appendix D Related Components M N 61C613 16 Channel Analog Input Module For additional information 1 Allen Bradley Drive Mayfield Heights Ohio 44124 USA Tel 800 241 2886 or 440 646 3599 http www reliance com automax www rockwellautomation com Corporate Headquarters Rockwell Automation 777 East Wisconsin Avenue Suite 1400 Milwaukee WI 53202 5302 USA Tel 1 414 212 5200 Fax 1 414 212 5201 Headquarters for Allen Bradley Products Rockwell Software Products and Global Manufacturing Solutions Americas Rockwell Automation 1201 South Second Street Milwaukee WI 53204 2496 USA Tel 1 414 382 2000 Fax 1 414 382 4444 Europe Middle East Africa Rockwell Automation SA NV Vorstlaan Boulevard du Souverain 36 1170 Brussels Belgium Tel 32 2 663 0600 Fax 32 2 663 0640 Asia Pacific Rockwell Automation 27 F Citicorp Centre 18 Whitfield Road Causeway Bay Hong Kong Tel 852 2887 4788 Fax 852 2508 1846 Headquarters for Dodge and Reliance Electric Products Americas Rockwell Automation 6040 Ponders Court Greenville SC 29615 4617 USA Tel 1 864 297 4800 Fax 1 864 281 2433 Europe Middle East Africa Rockwell Automation Br hlstra e 22 D 74834 Elztal Dallau Germany Tel 49 6261 9410 Fax 49 6261 17741 Asia Pacific Rockwell Automation 55 Newton Road 11 01 02 Revenue House Singapore 307987 Tel 65 6356 9077 Fax 65 6356 9011 Pub
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