Allen-Bradley 1756-IT6I Thermocouple Input Module

Allen-Bradley 1756-IT6I is a six-channel, isolated thermocouple input module for ControlLogix PLCs. Each of its six inputs is independently isolated and shares a single cold-junction compensation (CJC) sensor, enabling stable measurements across the channel set. The module supports thermocouples types B, E, J, K, R, S, T, N, C, D, and L (TXK/XK) and provides a two-range input scheme: -12 to 78 mV (standard) or -12 to 30 mV (high-resolution), with 16-bit resolution; typical conversion is 1.4 µV/bit in the standard range and 0.7 µV/bit in high-resolution mode. It uses a 20-pin interface for connection to the ControlLogix backplane. Six-channel isolated thermocouple input modules like the 1756-IT6I are used for precise temperature sensing and monitoring in industrial processes, feeding digital values to the CPU for accurate temperature control and data logging.