Reliance 57403-E AC High Digital Output Module

The 57403-E AC High Digital Output Module is a 16-channel, 115 VAC high‑output digital I/O module designed for Reliance Electric AutoMax and Baldor Reliance control systems. Also cataloged as O-57403-E (and 0-57403-E in some listings), it provides sixteen independently controlled AC outputs intended to switch 115 VAC loads from a PLC backplane. This module belongs to the Reliance 115 VAC High Power Output Module family, with documentation tied to the Reliance 115 VAC High Power Output Module Manual, J-3623. Distributor and repair catalogs consistently describe the 57403-E as a 115 V AC high-output module, confirming its role in legacy automation architectures that require direct AC load switching from backplane I/O. The module’s historical designation and cross‑references appear across multiple listings, underscoring its place in older Reliance Electric AutoMax installations and related Baldor Reliance control ecosystems.