Cincinnati Milacron 3-531-4370A PLC I Bus Adapter Module

The Cincinnati Milacron 3-531-4370A I/O Bus Adapter Module is a PCB-based interface card used in Milacron PLC systems to connect I/O signals to the main control bus. Identified by part number 3-531-4370A and, in some listings, Rev. B, this module is marketed and sold as a spare part for Milacron control hardware and is frequently shown as refurbished or remanufactured. Widely described in catalogs and repair inventories as an I/O bus adapter (IBA) module, the 3-531-4370A appears under entries like "I/O Bus Adapter" or "IBA Module" and is available from multiple distributors. Features noted by sellers include LED status indicators, and several listings report the module as in stock. Availability is primarily as a replacement part for existing Milacron installations, with refurbishments offered by multiple service providers. As part of the Cincinnati Milacron PLC ecosystem, the 3-531-4370A serves to facilitate communication between I/O devices and the controller on Milacron-era control systems.