Rockwell Automation 1762-IR4 RTD/Resistance Input Module - Manual (Page 32)

Publication 1762-UM003A-EN-P - February 2003
2-14 Installation and Wiring
4-Wire RTD Configuration
Wiring Resistance Devices (Potentiometers)
Potentiometer wiring requires the same type of cable as that for the
RTDs described on page 2-9. Potentiometers can be connected to the
module as a 2-wire or 3-wire connection as shown on page 2-14.
2-Wire Potentiometer Interconnection
EXC 2
SENSE 2
RTN 2
NC Belden 83503 or 9533 Shielded Cable
Leave one sensor wire open.
Cable Shield (to Ground)
RTD EXC
Return
RTD EXC
Return
Sense Sense
EXC 2
SENSE 2
RTN 2
NC
EXC 2
SENSE 2
RTN 2
NC
Cable Shield (to Ground)
Potentiometer
RTD EXC
Return
Cable Shield (to Ground)
Potentiometer RTD EXC
Return
Belden 9501 Shielded Cable
Belden 9501 Shielded Cable
TIP
The potentiometer wiper arm can be connected to
either the EXC or return terminal depending on
whether you want increasing or decreasing
resistance.