How are the expansion modules (XP) attached to ACX57xx properly powered when the host ACX is using 12VDC.

Issue

Site using 12VDC to power ACX5740s, they need to attach IO expansion modules to the ACX but the XP modules specify they require 24VDC.

Product Line

Andover Continuum

Environment

ACX5740

ACX5720

XP modules

Cause

Documentation

Resolution

The ACX57xx hardware has been designed to maintain 24VDC on the expansion port over the full 12-28VDC input range of  the ACX, this is accomplished via a boost/buck converter circuit in the hardware.