Barber-Colman GCMA-112-0-0-3 PCB Circuit Board

Barber-Colman GCMA-112-0-0-3 PCB Circuit Board is a legacy control-board component from the Barber-Colman/SIEBE/Invensys GCMA family. The exact part designation is GCMA-112-0-0-3 and distributors list it as discontinued by the manufacturer, reflecting its status within an older GCMA product line used in control-system installations. A closely related GCMA variant, GCMA-112-2 CPU BOARD, is also documented in the same family, illustrating how GCMA PCBs differentiate between CPU and other sub-assemblies within Global Control Module configurations for smoke-control system equipment. Secondary marketplaces have carried this exact part number, including new-in-box listings, indicating ongoing demand for spare parts to service legacy equipment. For anyone restoring or maintaining a GCMA-based system, sourcing the GCMA-112-0-0-3 requires matching the precise model to ensure compatibility with the original hardware and firmware revisions in the GCMA lineage. Availability on secondary markets suggests it is still sought after for repairs or restoration of older control-system installations.