Allen-Bradley 634489 A REV-4 UPJ Control Module

Allen-Bradley 634489 A REV-4 UPJ Control Module is a legacy Allen-Bradley PCB control board designed for use in 7300-UPJ control systems. This Rev-4 variant identifies the fourth engineering revision of the 634489 family. The module functions as the UPJ control component within compatible Allen-Bradley equipment and is commonly used as a direct replacement part to restore operation in legacy machines that rely on UPJ control architecture. In typical applications, technicians replace a failed or aging UPJ control module with the same 634489 A Rev-4 part to maintain continuity of control workflows in 7300-UPJ-equipped systems. The part designation 634489 A and Rev-4 help confirm compatibility with the corresponding UPJ assemblies from Allen-Bradley, ensuring you’re sourcing an authentic AB control module for legacy automation setups.