Product Overview

The TU842 (Part Number: 3BSE020850R1) is a high-integrity Redundant Module Termination Unit (MTU) designed for the ABB S800 I/O system, compatible with Symphony Plus and AC 800M controllers. Its primary technical function is to provide the physical and electrical interface for redundant I/O configurations. The TU842 (3BSE020850R1) distributes dual ModuleBuses to each I/O module and ensures signal continuity to subsequent MTUs in the cluster. By shifting outgoing position signals, it automatically generates the correct hardware addresses for the I/O modules. This unit is essential for high-availability industrial processes where communication redundancy and secure field wiring termination are critical to preventing system downtime.

Detailed Technical Specifications