Westinghouse Electric Corporation 398879 Relay Card

The Westinghouse / Hagan 398879 Relay Card is an electronic relay interface PCB (Relay Card 4) used in Westinghouse automation, drive control, and process control systems. It functions as a relay-based signal switch and control logic interfacing board, designed as a plug-in circuit board assembly for installation in industrial control cabinets and automation panels, providing output control within larger control architectures. Common applications include industrial control panels, automation systems, process control equipment, drive systems, manufacturing machinery, and OEM control cabinets requiring relay isolation and signal routing, with compatibility for Westinghouse Hagan Control Systems and suitability for replacement and retrofit projects.