Allen-Bradley 1746-NR8 Module

The Allen-Bradley 1746-NR8 is an 8-channel, 16-bit RTD/resistance analog input module for SLC 500 PLC systems, engineered for precise temperature and resistance measurements via RTD sensors or direct resistance inputs in industrial process control, manufacturing, and energy management applications requiring reliable, high-accuracy data capture for thermal monitoring and mechanical position feedback.

1. 8 Configurable RTD/Resistance Channels: Supports diverse RTD types (Platinum 385/3816, Copper 426, Nickel 618/672, Nickel Iron 518) and direct resistance ranges (0–150, 0–300, 0–500, 0–1000 Ω), eliminating signal converters and ensuring broad sensor compatibility.
2. 16-Bit Resolution with Sigma-Delta Conversion: 65,536 discrete values via sigma-delta A/D conversion for precise measurement, paired with programmable low-pass filtering (7.8–1676 Hz) to balance noise immunity and response time in harsh industrial environments.