Rockwell Automation 61C544A RTD Module - Manual (Page 14)

3Ć2
Step 3. Fasten the wires from the RTDs to the screwĆtype
connectors on the terminal boardassemblies. Use
shielded dual twistedĆpair cable, such as Belden 9502 or
equivalent. Typical RTD wiring connections are shown in
figure 3.2. Refer to Appendix C for a listing of the terminal
boardconnections. See Appendix G for a listing of
module faceplate connections.
Be sure that all of the RTD fieldwire connections are tight.
Note that all 4 wires must be connectedto the RTD.
The RTD module is designed to provide optimum
performance when usedwith 4Ćwire RTDs. When used
with 2Ć or 3Ćwire RTDs as shown in figure 3.2, the module
will still provide accuracy that is superior to that of
bridgeĆmeasurement techniques. See Appendix E for
additional information on 2Ć and 3Ćwire RTDs.
RTD
0
RTD
7
RTD
4 wires
4 wires
RTD
8
RTD
15
4 wires
4 wires
12 AWG
Green Wire
Chassis Common
for Cable Shields
AutoMax
or AutoMate
Multibus Rack
Cable andTerminal BoardAssembly
M/N 61C545 or
M/N 61C546 FieldWiring
Belden 9502
Figure 3.1 Ć RTD Module Connections