Rockwell Automation 1746-NR8 SLC 500 RTD/Resistance Input Module User Manual - Manual (Page 28)

Publication 1746-UM003A-EN-P
2-8 Installation and Wiring
Terminal Wiring
Figure 2.1 Terminal Block
Wiring Considerations
Follow the guidelines below when planning your system wiring.
Since the operating principle of the RTD module is based on the measurement
of resistance, take special care in selecting your input cable. For 2-wire or
3-wire configuration, select a cable that has a consistent impedance throughout
its entire length.
ATTENTION
!!!!
Disconnect power to the SLC before attempting to install,
remove, or wire the removable terminal wiring block. To
avoid cracking the removable terminal block, alternate the
removal of the terminal block release screws.
RTD 0
Sense 0
Return 0
RTD 1
Sense 1
Return 1
RTD 2
Sense 2
Return 2
RTD 3
Sense 3
Return 3
RTD 4
Sense 4
Return 4
RTD 5
Sense 5
Return 5
RTD 6
Sense 6
Return 6
RTD 7
Sense 7
Return 7
(Terminal Block Spare Part Number 1746-RT35)
Release Screw Maximum Torque = 0.25 Nm (2.25 lbs-in)
Configuration Recommended Cable
2-wire Belden™ #9501 or equivalent
3-wire
less than 30.48m (100 ft.) Belden #9533 or equivalent
3-wire
greater than 30.48m (100 ft.) or high humidity
conditions Belden #83503 or equivalent