1746-NT4 | Allen-Bradley SLC 500 Thermocouple/mV Analog Input Module 4 Point

Allen-Bradley · HMIs & Displays

Description The Allen-Bradley 1746-NT4 is a thermocouple/millivolt analog input module designed for the SLC 500 platform. It provides four isolated input channels capable of reading multiple thermocouple types and low-level mV signals with high conversion accuracy. Powered directly through the system backplane, the module offers reliable temperature and signal monitoring for industrial control applications.     Technical Specifications Condition New/Never Used Surplus Category PLC Modules Subcategory SLC 500 Analog Input Brand Allen-Bradley Manufacturer Rockwell Automation Series SLC 500 Part Number 1746-NT4 Module Type Thermocouple/mV Analog Input Module Channels 4 Inputs Thermocouple or mV Compatible Thermocouples J, K, T, E, S, R, B, N Compatible mV Signals ±50 mV, ±100 mV A/D Conversion Sigma-delta modulation Resolution 16-bit input, 14-bit output Update Time 26 ms – 1.2 s Step Response 60 ms in, 2.5 ms out Open Circuit Detection Zero, Upscale, Downscale Channel Isolation Backplane isolated Backplane Current (5V) 60 mA Backplane Current (24V) 55 mA Backplane Power Consumption 0.8 W max (0.3 W @ 5V, 0.5 W @ 24V) I/O Slot Location Any slot except slot 0 Operating Temperature 0 to 60 °C Storage Temperature –40 to 85 °C Compatible Wiring Shielded thermocouple extension wire or Belden 8761 (for mV)     Information About 1746-NT4 The 1746-NT4 is part of the SLC 500 family and serves as a dedicated input module for thermocouple and millivolt measurements. It supports a broad range of sensor types—J, K, T, E, S, R, B, and N—as well as ±50 mV and ±100 mV signals, making it suitable for diverse thermal monitoring tasks. Its sigma-delta A/D conversion method ensures stable readings, while built-in cold-junction compensation enhances accuracy across all channels. Designed for installation in any chassis slot except slot 0, the module operates without external power, drawing all required voltage from the SLC backplane. Key Features: Multi-Sensor Compatibility: Accepts thermocouples J, K, T, E, S, R, B, and N as well as ±50 mV and ±100 mV mV signals. Four Isolated Channels: Each channel is individually backplane-isolated for improved signal integrity. Advanced A/D Conversion: Utilizes sigma-delta modulation to provide stable, precise measurements. Open-Circuit Detection: Configurable for Zero, Upscale, or Downscale responses to identify faulty sensors. Flexible Filtering Options: Selectable channel filters (250 Hz, 60 Hz, 50 Hz, 10 Hz) help reduce electrical noise. Backplane-Powered Design: Operates entirely from 5 VDC and 24 VDC backplane currents, requiring no external supply. Wide Update Range: Update times between 26 ms and 1.2 s accommodate both fast and slow-changing processes. Robust Operating Range: Functions reliably from 0 to 60 °C with a storage range down to −40 °C. The 1746-NT4 delivers the accuracy and flexibility required for dependable temperature and low-level signal acquisition in SLC 500 automation systems.

Brand: Allen-Bradley · Category: HMIs & Displays

Key features

• Multi-Sensor Compatibility: Accepts thermocouples J, K, T, E, S, R, B, and N as well as ±50 mV and ±100 mV mV signals.
• Four Isolated Channels: Each channel is individually backplane-isolated for improved signal integrity.
• Advanced A/D Conversion: Utilizes sigma-delta modulation to provide stable, precise measurements.
• Open-Circuit Detection: Configurable for Zero, Upscale, or Downscale responses to identify faulty sensors.
• Flexible Filtering Options: Selectable channel filters (250 Hz, 60 Hz, 50 Hz, 10 Hz) help reduce electrical noise.
• Backplane-Powered Design: Operates entirely from 5 VDC and 24 VDC backplane currents, requiring no external supply.
• Wide Update Range: Update times between 26 ms and 1.2 s accommodate both fast and slow-changing processes.
• Robust Operating Range: Functions reliably from 0 to 60 °C with a storage range down to −40 °C.

Specifications

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