Reliance Electric 45C1A Three Phase Contactor

Reliance Electric 45C1A Digital I/O Rail Mount is a compact I/O module for Reliance Automate PLC systems, designed for DIN-rail mounting inside control panels. This digital I/O rail provides digital input and output functionality on a single 45C1A unit, rated for up to 10 A RMS of load current across connected circuits. Built for easy integration with other Automate modules, the 45C1A simplifies wiring and helps conserve panel space by mounting on a standard DIN rail. In typical applications, it serves as a discrete I/O interface for sensors such as switches and for actuators like relays or solenoids, allowing a Reliance controller to monitor signals and energize devices in automated processes. The module is part of the Reliance Electric Automate digital I/O rail family, representing the era of PLCs that used plug-in, DIN-rail-mounted I/O for scalable control architectures. Because it is a legacy module, it is commonly found in catalogs and repair inventories that service vintage Reliance Automate systems. When evaluating compatibility, verify that your system uses the Reliance Automate I/O topology that supports 45C1A modules within the same rail-based I/O chassis.