Allen-Bradley 1746-NR4 SLC 500 RTD/Resistance Input Module

Description

Allen-Bradley 1746-NR4 SLC 500 RTD/Resistance Input Module is a dedicated input module designed for integration with programmable logic controllers (PLCs), including CompactLogix, MicroLogix 1500, and ControlLogix controllers. It features a single input channel, optimized for RTD (resistance temperature detector) and resistance-type signals, supporting common sensors such as Pt100 (DIN/IEC 751) and Ni120. The module delivers 16-bit resolution and high measurement accuracy, with a basic precision of ±0.2 degrees Celsius for Pt100 RTDs within the 0 to 100 degrees Celsius range.

Engineered with a scalable design, it offers multiple configuration settings to adapt to diverse industrial applications, including signaling line circuit (SLC) loops. It reduces space requirements compared to rack-based alternatives and fits seamlessly with ControlLogix-style chassis. For reliable performance, installation in a slot that minimizes electrical interference is recommended, as RTD modules are susceptible to such disruptions. The module supports flexible communication across multiple networks, including ControlNet, DeviceNet, and Ethernet/IP, and is compatible with third-party PLC devices, making it a versatile component for industrial temperature and resistance monitoring systems.