Allen-Bradley 1771-IRC RTD Input Module

Allen-Bradley 1771-IRC RTD Input Module is a six-channel RTD input card designed for PLC-5 1771 I/O racks. It supports six RTD sensors configured for 3-wire RTD connections, enabling 3-wire input per channel to improve measurement accuracy by compensating lead resistance. The module is powered from the backplane and communicates with the controller via the PLC-5 block transfer interface, making it an integral part of the 1771 I/O chassis. It’s intended for use with PLC-5 controllers to acquire temperature data across multiple process points, a common requirement in industrial automation, manufacturing, and process industries where stable RTD readings are preferred over other sensor types.