Cincinnati Milacron 3-531-3206A CNC Circuit Board Card

The Cincinnati Milacron 3-531-3206A is a contact input IO board that functions as a CNC circuit board card within Cincinnati Milacron control systems. Also cataloged as 35313206A, this Rev C module is described in listings as a Contact Input IO Board, signaling its role as the input interface for digital signals coming from external devices into the CNC controller. In practice, the board accepts on/off signals from inputs such as switches or sensors and feeds them to the controller to govern machine sequencing and safety interlocks. Vendor listings confirm the part numbers 3-531-3206A and 35313206A and mark the revision as Rev C, helping technicians verify compatibility with their Milacron CNC hardware before replacement.