1746-NT8 Allen-Bradley Thermocouple Input Module | 8-Channel mV Sensor

Description

Allen-Bradley 1746-NT8: 8-Channel Thermocouple/mV Input Module

Accurate Temperature and Voltage Measurement

The Allen-Bradley 1746-NT8 connects eight thermocouple or mV sensors to your SLC 500 system. It reads precise temperature and voltage signals for process control. This 1746-NT8 module supports all major thermocouple types and mV ranges. It fits in one slot and works with both fixed and modular chassis.

Key Technical Specifications

Brand: Allen-Bradley
Model: 1746-NT8
Type: 8-Channel Thermocouple/mV Input
Thermocouple Types: J, K, T, E, S, R, B, N
mV Ranges: ±50 mV, ±100 mV
Resolution: 16-bit
Update Time: 356 ms to 4.05 s (per channel)
Input Impedance: >10 MΩ
Noise Rejection: >100 dB at 50-60 Hz
Isolation: 500V DC for 1 minute
Cold Junction Compensation: ±1.72°C accuracy
Backplane Power: 5V DC, 120 mA / 24V DC, 70 mA
Max Power: 2.28 W
Operating Temp: 0 to 60°C (32 to 140°F)
Open Circuit Detection: Zero, upscale, or downscale selectable
Calibration: Automatic every 2 minutes

12 Month Warranty

We guarantee this 1746-NT8 module for one full year. It covers any material or workmanship defects. We provide quick repair or replacement service. We ship worldwide using FedEx, UPS, and DHL.

Download Installation Guide

• Learn wiring for all thermocouple types and mV signals.
• Understand cold junction compensation setup.
• Get configuration steps for different sensor types.
• Find troubleshooting tips for open circuit detection.

Download SLC 500 Hardware Manual Here

Important Technical Questions

• What thermocouple types does it support?
  It supports all standard types: J, K, T, E, S, R, B, and N for wide temperature measurement.
• How does cold junction compensation work?
  Two built-in sensors measure terminal block temperature for accurate cold junction compensation automatically.
• Can I mix thermocouple and mV inputs?
  Yes. Each channel can be independently configured for thermocouple or mV input.
• What is the input impedance?
  Very high impedance (>10 MΩ) ensures accurate measurements without loading the sensor signal.
• How often does it auto-calibrate?
  It performs automatic self-calibration every 2 minutes after power-up for maintained accuracy.