Allen-Bradley 1746-NT4 4-Channel Thermocouple/mV Input Module

Allen-Bradley 1746-NT4 is a four-channel thermocouple/millivolt input module for SLC 500 automation systems. Each channel accepts thermocouple types B, E, J, K, N, R, S, and T, as well as millivolt signals, enabling precise temperature monitoring and low-level voltage measurement across multiple sensors in a single module. The unit provides two selectable millivolt input ranges—±50 mV and ±100 mV—to accommodate different sensor outputs and optimize resolution. Designed for use with the 1746 backplane in Rockwell's SLC 500 platform, this FRN 2 revision delivers straightforward integration for temperature profiling, furnace or kiln control, and lab instrumentation where four simultaneous TC or mV inputs are required. Typical installations place the module in racks alongside other SLC 500 I/O to centralize sensing and monitoring.