Reliance Electric 57403-F (also listed as 57C403) is a 16-channel AC output module for Reliance Electric AutoMax PLC systems, delivering sixteen independent 115 VAC output points for switching line-voltage loads. This high-output module is used to drive AC loads such as relays, contactors, and other field devices in industrial control panels. The 57403-F / 57C403 designation identifies the same 16-channel 115 VAC output interface across catalog and surplus listings, confirming its role within legacy Reliance Electric automation configurations.
