Rockwell Automation 1790P-4R0 CompactBlock LDX I/O RTD/Resistance Input Module - Manual (Page 27)

Publication 1790-UM002A-EN-P
Installation and Wiring 2-15
2-Wire RTD Configuration
3-Wire RTD Configuration
4-Wire RTD Configuration
Wiring Resistance Devices (Potentiometers)
Potentiometer wiring requires the same type of cable as that for the RTDs.
Potentiometers can be connected to the module as a 2-wire or 3-wire
connection as shown in the following figure.
Cable Shield (to Ground)
RTD EXC
Return
RTD EXC
Return
Add Jumper
CHO_A
CHO_B
COM
43251
Cable Shield (to Ground)
RTD EXC
Sense
RTD EXC
Return
Sense
Return
CHO_A
CHO_B
COM
43252
Cable Shield (to Ground)
RTD EXC
Return
RTD EXC
Return
Sense Sense
43253
CHO_A
CHO_B
COM
Leave this sensor wire open