Cincinnati Milacron 3-531-3697A VMU Control Board

The Cincinnati Milacron 3-531-3697A VMU Control Board is a Voltage Monitor Unit (VMU) circuit board used in Cincinnati Milacron CNC controls to monitor voltage-related functions within the VMU module. The part is listed under several revisions, including 3-531-3697A, 3-531-3697-A, and 3-531-3697AJ (Rev. J), reflecting multiple production runs and refurbishment variants. Vendors describe it specifically as a VMU or voltage monitor board for Cincinnati Milacron equipment, and it frequently appears in listings for circuit boards or control boards used to repair or refurbish older Milacron CNC systems. Typical applications are for Cincinnati Milacron CNC milling and related machines that rely on the VMU module for protection and monitoring of power-related signals. When purchasing, verify compatibility with the machine’s exact control family and revision level, since connector layouts and form factors can differ between models.