Wiring Considerations - Allen-Bradley SLC 500 User Manual

3-8 Installation and Wiring
Publication 1746-UM007C-EN-P - July 2004
(Terminal Block Spare Part Catalog Number 1746-RT32)
CJC A+
CJC Assembly
_
CJC A
Shield
Shield
Shield
Shield
Shield
_
CJC B
CJC Assembly
CJC B+
Release Screw
Replacing a Series A thermocouple module with a Series B module
requires that the bottom right terminal (which was SHIELD on Series A
modules) no longer be connected to CHASSIS GROUND if it was
previously. Use one of the other SHIELD terminals.

Wiring Considerations

The possibility exists that grounded or exposed
ATTENTION
thermocouples can become shorted to a potential
greater than that of the thermocouple itself. Due to
possible shock hazard, care should be taken when
wiring these types of thermocouples. Refer to
Appendix D for more details.
Follow the guidelines starting below when planning your system
wiring.
• To limit noise, keep thermocouple and millivolt signal wires as
far away as possible from power and load lines.
Release Screw
Channel 0+
_
Channel 0
Channel 1+
_
Channel 1
Channel 2+
_
Channel 2
Channel 3+
_
Channel 3
Analog Common
[see below]