OVERVIEW

Official designation: Allen-Bradley 1746-NT8 (SLC 500, Analog Input Module)

The 1746-NT8 is a high-resolution SLC 500 analog input module featuring eight differential channels. It is designed for precise monitoring of temperature signals using various thermocouple types and millivolt inputs.

KEY SPECS SUMMARY

Power: 5V DC backplane, 130 mA

Interfaces / Ports: 36-pin terminal block

Indicators: Module status and input status LEDs

Operating Temp: 0 to 60 degrees C

Platform / Compatibility: SLC 500 I/O chassis

Limit: 8 channels, supports 8 TC types

Lifecycle: Discontinued

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: Which range of signal types, in addition to thermocouples, can the 1746-NT8 module accept?

A: The module supports a low-level voltage input range of plus/minus 50 mV.

Wiring & Installation:

Q: What are the necessary considerations for wiring thermocouples to the 1746-NT8 module to ensure measurement accuracy?

A: Cold Junction Compensation wiring practices are essential for accurate temperature measurements.

Troubleshooting & Compatibility:

Q: What is the significance of the module status indicator on the 1746-NT8 analog input module?

A: The module status indicator lights up to signal diagnostics or operational mode information.

Replacement & Upgrades:

Q: What is the recommended strategy when upgrading a system that relies on the 1746-NT8 module's thermocouple inputs?

A: Migration to CompactLogix or ControlLogix platforms with high-density analog input modules is suggested.