Industrial 57408-B Power Module Interface Clean

The Reliance Electric 57408-B Power Module Interface is the AutoMax drive-system interface card that links the drive controller, analog I/O, and power module inside a backplane rack. On the front, it provides three RS-232 ports labeled TO DRIVE CONTROLLER, TO ANALOG I/O, and TO POWER MODULE, plus four CURRENT CALIBRATION terminals for setting the controlled current. The module slides into an AutoMax storage rack backplane and is mounted with brackets, forming part of a multi‑module chassis that also includes the Drive Digital I/O module (O-57401) and related components. Historical references describe the 57408-B as the Power Module Interface in Reliance AutoMax systems, with variants sometimes listed as 0-57408 or O-57408-B depending on production.