ABB FDC86-UNIT1B Programmable Logic Controller Module

ABB FDC86-UNIT1B is a 3.5-inch floppy-disk drive module designed to be used with ABB Advant Master distributed control system (DCS). It functions as a field controller/storage unit that provides removable media for program data and configuration files within ABB automation hardware. The module accepts standard 3.5-inch floppy media and connects to the ABB control platform via its disk interface, enabling offline data transfer and archival within legacy installations. Typical applications include storing control configurations, loading software updates, and exchanging data between ABB devices in a legacy Advant Master environment. The part number FDC86-UNIT1B identifies the disk drive module and is consistently referenced across ABB catalogs and third-party listings as the floppy-disk option within ABB drive and controller families, illustrating its role as a dedicated archival and interchange medium for ABB automation ecosystems.