Reliance 57405-E Analog Input Module Card

The Reliance 57405-E analog input module is a legacy Reliance Electric drive I/O card that accepts analog signals from field devices and presents them to the drive's control logic for monitoring and regulation. In catalogs and aftermarket listings it is often referenced as O-57405-E, reflecting its cross-reference within Reliance/Rockwell automation hardware. Designed for use in compatible backplanes and racks in vintage AB/Rockwell installations, this module serves as the analog input interface within the drive's I/O suite, enabling sensors and transducers to feed real-time data to the controller for feedback, monitoring, and control actions. Availability from multiple suppliers—ranging from surplus vendors to refurbishers—underscores its role in replacement and repair of older Reliance Electric and Reliance drive systems. Because of its age, the 57405-E is typically encountered in legacy systems and is often sourced to maintain or restore existing installations rather than used in new designs.