Cincinnati Milacron 3-531-4014A CNC Interface Card

3-531-4014A is a Cincinnati Milacron CNC Interface Card described in used-parts listings as a Relay Output Board for legacy CNC controls, with the model also noted as 35314014A in some postings. In market listings, the item is consistently identified as a Relay Output Board, signaling its role in providing relay-style outputs that switch external circuits under the CNC system’s control. This type of interface card is associated with Cincinnati Milacron’s older control architectures and is commonly sought by techs restoring or maintaining vintage machines. Some listings indicate the unit may be sold refurbished or restored, reflecting its status as a legacy component that can be repurposed or reactivated in compatible systems. Because this is a vintage CNC accessory, compatibility hinges on the specific machine’s control configuration and I/O wiring; buyers should verify pinouts, signal expectations, and connector compatibility against the machine’s service manual and I/O schematics before installation.