Reliance Electric 57403-J High Output Module

Reliance Electric 57403-J High Output Module (often cataloged as 57C403) is a 16‑channel, 115 VAC high‑power output module designed for the AutoMax PLC family. It provides sixteen outputs that can switch up to 2 A per channel, operates at 50 or 60 Hz, and is organized with four isolated commons (four outputs per common) while offering 2500 V isolation to the logic common. The unit is built to handle high inrush loads and is intended to drive 115 VAC control signals from an AutoMax controller. The 57403‑J / 57C403 designation appears across Reliance Electric and Rockwell Automation documentation; while no longer manufactured by Reliance Electric, these modules frequently appear in the secondary market under the same part numbers.