Industrial 57403-D Relay Distributed Control System

Reliance Electric AutoMax 57403-D High Output Module is a 16‑channel, 115 V AC output module designed for use with the AutoMax distributed control system. It provides sixteen 115 VAC outputs organized into four isolated commons (four outputs per common), with each output capable of delivering up to 2 A and supporting operation at 50 or 60 Hz. The module offers 2500 V isolation to the logic common and is engineered for high inrush loads, making it well suited for energizing contactors and other 115 VAC control devices. Documented for the AutoMax PLC family (manual J‑3623), the 57403-D is also referenced by variant designations such as O‑57403‑D in Baldor Reliance catalogs. Typical installations use this high‑output module to drive multiple 115 VAC control signals from a single AutoMax controller, enabling compact, centralized control of machinery and sequences in industrial environments. Availability and listings from distributors like AXControl and Radwell underscore its ongoing use in legacy Reliance AutoMax configurations.