ABB TU833 3BSE038726R1 S800 I/O Extended Module Termination Unit

Description

The TU833 3BSE038726R1 is a passive baseplate for mounting S800 I/O modules on a DIN rail. The "Extended" version offers increased terminal capacity and improved wire management, supporting up to three wires per signal channel. It reduces the need for external marshalling panels by allowing direct connection of field power and signal return lines. The unit features mechanical keying to prevent incompatible module insertion, ensuring electrical safety and system reliability. Its durable design is built for continuous operation in process automation and power plant environments.

Specifications

• Manufacturer: ABB

• Model Number: TU833 (3BSE038726R1)

• Product Type: Extended Module Termination Unit (MTU)

• Terminal Arrangement: Three rows for signal, return, and ground

• Maximum Rating: 50 V DC / 2 A per channel

• Connection Method: Screw-clamp terminals

• Conductor Range: 0.2 to 2.5 mm²

• ModuleBus Interface: Dual support for redundancy

• Operating Temperature: -25 to +70 °C

• Weight: 0.50 kg

Features

• Three-Wire Field Termination: Simplifies cabinet internal wiring by providing dedicated terminals for signal, power distribution, and return for each I/O point.

• Redundant ModuleBus Support: Features dual internal bus connections to ensure continuous communication in high-availability system configurations.

• Mechanical Safety Coding: Built-in physical keying prevents human error by ensuring only the correctly rated I/O module can be seated in the MTU.

• Hot-Swap Capability: Allows for the live replacement of I/O modules without the need to disconnect field wiring or interrupt system power.

• Integrated Shielding Terminals: Provides easy access for cable shield grounding, essential for maintaining signal integrity in high-EMI industrial zones.

• High-Density Footprint: Designed to maximize cabinet space while providing clear terminal identification for rapid installation and troubleshooting.