Allen Bradley SLC 500 | 1746-NT8 | Thermocouple/mV Analog Input Module

Product Description

The Allen Bradley 1746-NT8 is an analog input module designed for the SLC 500 series, supporting thermocouple and millivolt signal inputs. It provides eight input channels with high accuracy and flexible sensor compatibility, making it suitable for temperature monitoring and precision measurement applications in industrial automation systems.

Technical Specifications

• Manufacturer: Allen Bradley

• Product Line: SLC 500

• Category: PLC Modules

• Model / Part Number: 1746-NT8

• Weight: 1 lb (0.45 kg)

• Module Type: Thermocouple/mV Analog Input

• Number of Inputs: 8 channels

• Compatible Thermocouple Types: J, K, T, E, S, R, B, N

• Compatible Millivolt Signals: ±50 mV, ±100 mV

• Resolution: 16-bit input, 14-bit output

• Update Time: 356 ms to 4.05 s

• Step Response: 60 ms input, 2.5 ms output

• A/D Conversion Method: Sigma-delta modulation

• Open Circuit Detection: Zero, Upscale, Downscale

• Backplane Current Draw: 120 mA @ 5 VDC; 70 mA @ 24 VDC

• Backplane Power Consumption: 2.28 W max (0.6 W at 5 VDC, 1.68 W at 24 VDC)

• I/O Chassis Location: Any slot except Slot 0

• Operating Temperature: 0 to 60 °C

• Storage Temperature: -40 to 85 °C

Application Scenarios

The 1746-NT8 is widely used in process industries where precise temperature measurement is critical, such as chemical processing, food manufacturing, and energy systems. Its compatibility with multiple thermocouple types ensures flexibility across different sensor requirements.

FAQ

Q: Which sensors are supported by this module?  A: It supports J, K, T, E, S, R, B, and N thermocouples, as well as ±50 mV and ±100 mV signals.

Q: Can this module be installed in any slot of the chassis?  A: Yes, it can be installed in any slot except Slot 0.

Q: What is the resolution of the input signals?  A: The module provides 16-bit resolution for input signals and 14-bit resolution for output data.