Cincinnati Milacron 531-3312A Communication Module

The Cincinnati Milacron 3-531-3312A Communication Module is a PCB-based PC communications board that serves as the dedicated interface within Cincinnati Milacron control systems. Also cataloged as 35313312A, this component is commonly described in vendor listings as a “communication module” or “communication board,” and is recognized by the identifiers 3-531-3312A, 531-3312A, and 35313312A. As a board-level module, it integrates into Milacron CNC/control architectures to enable data exchange between the controller and external devices or subsystems, rather than acting as a separate processing or I/O module. Verified listings explicitly label it a PC COMMUNICATION BOARD, underscoring its role as the communications interface in older Milacron equipment. Typical use cases involve replacement or repair of Milacron machines when a damaged or obsolete communication card interrupts the data link between the control system and peripheral equipment, with repair catalogs and aftermarket distributors repeatedly referencing the 3-531-3312A as a Cincinnati Milacron communications solution. The part’s long‑standing presence in Milacron repair literature and third‑party listings reflects its function as a dedicated communication interface within legacy Milacron control ecosystems.