Accutrac UE9012I Serial Interface Expansion Board

The UE9012I Serial Interface Expansion Board (Revision B, Part Number UE9012I, secondary ID #165931) is a multi‑layer PCB‑based serial interface module that provides serial data communication and signal interfacing between processors, controllers, and peripheral devices in industrial automation systems. It is designed for chassis or rack mounting and is commonly installed in OEM machinery, industrial controllers, process automation equipment, and legacy electronic assemblies where board‑level serial communications are required. As a used and surplus component manufactured in the United States, the UE9012I serves replacement, retrofit, and repair projects to restore communication capabilities and maintain system operation across industrial control panels and OEM equipment, with exact applications determined by the original system configuration; common replacements include ACCUTRAC UE90121 Revision B circuit board.