Barber-Colman A-11980-0-1 Sequence Controller Card

Barber-Colman A-11980-0-1 Sequence Controller Card is a MACO-series control module designed to drive a predefined sequence of outputs within compatible Barber-Colman multi-slot racks. The model is listed as A-11980-0-1, with some catalogs referencing it as A-11980-000-1, and an internal reference such as #135615 appears in related documentation. As part of Barber-Colman's legacy automation hardware, this sequence controller card would have been used to coordinate a series of actions across connected controllers and relay outputs within a MACO-based control system. Barber-Colman has a long history in industrial controls, and MACO-series components were designed to support modular expansion of sequencing capabilities in older control rack architectures. For exact electrical characteristics, connector interfaces, timing options, and rack compatibility, refer to official Barber-Colman MACO installation manuals or contemporary supplier catalogs that specifically cite this model. Because these parts originate from older Barber-Colman equipment, they are frequently found through surplus channels and repair specialists. When replacing a unit, matching the exact model and revision is important to ensure compatibility with existing MACO racks and downstream devices.