Allen-Bradley 1771-NT2 Isolated Analog Module

The Allen-Bradley 1771-NT2 is an 8-channel, high-resolution isolated analog input module designed for the PLC-5 1771 I/O system. It provides eight thermocouple inputs with built-in linearization, supporting common thermocouple types B, E, J, K, R, S, and T, and delivers galvanic isolation between the input signals and the backplane. Each channel feeds a 16-bit A/D converter with a 65,000-count full-scale range and typical accuracy around 0.01% of full scale, enabling precise temperature measurements in industrial environments. The thermocouple inputs operate in the millivolt domain, typically described as -5 to +55 mV per channel, making the module suitable for multiple-sensor temperature monitoring in process control and manufacturing applications when installed in 1771 I/O racks with PLC-5 controllers. This module is part of the high-resolution 1771-N series of isolated analog I/O modules, offering channel-to-channel and backplane isolation to support robust operation in noisy industrial environments.