1746-NR8 SLC 500 RTD/Resistance Analog Input Module

The 1746-NR8 is a Resistance Temperature Detector (RTD) / Resistance module. This module accepts

resistance signals from RTD sensors such as Platinum (385) 100, 200, 500 and 1000; Platinum (3816)

100, 200, 500 and 1000; Copper (426) 10, Nickel (618) 120, Nickel (672) 120, and Nickel Iron (518) 604

and direct resistance values of 0 – 150 Ohms, 0 to 500 Ohms, 0 to 1000 Ohms and 0 to 300 Ohms.

This module is exclusively used for SLC 500 systems. It may be specifically used with the Two (2) variants

of SLC 500 such as Fixed and modular hardware style. It occupies single slot of any chassis used and

does not require an external power supply instead, this module is powered by the backplane power generated by the system power supply.

1746-NR8

This module is primarily used for Temperature applications as RTD sensors are specifically used to

measure temperature readings. The resistance capability of this module is applicable for measuring

displacement or movement or mechanical devices. Typically, it is used for measuring the length of

travel, movement reflected by the decrease and increase in the resistance reading.

This module supports 2-Wire, 3-Wire, and 4-Wire RTD sensors. For a 2-wire RTD, recommended wires

are Belden 9501 shielded cable or equivalent. For a 3-Wire or 4-Wire RTD, use Belden 9533 or Belden

83503 cable. For a 2-Wire RTD, avoid long cable runs as it reduces accuracy of measurement. It cannot

be avoided, the effect or long wires may be minimized by using a lower gauge cable such as an AWG #16 wire instead of AWG #24.