Termination Unit Base ABB TU846 Industrial Control

Description

The ABB TU846 is apassive termination unit (MTU)designed as the mechanical and electrical base for S800 I/O modules. It provides secure wiring interfaces forModuleBus communication, 24 V power distribution, and field signal connectionsin non-redundant configurations. The TU846 includesmechanical keyingto prevent incorrect module insertion, arotary address switchfor cluster configuration, and dedicated connectors to simplify system integration. As a result, it is widely used across the process, power generation, water treatment, and manufacturing sectors where reliable and service-friendly I/O mounting is essential.