ABB TU842 3BSE020850R1 S800 I/O Redundant Module Termination Unit

Description

The TU842 module termination unit supports redundant 24 V DC output modules like the DO840, ensuring continuous actuator control during faults or module replacement. It features shared field wiring, isolated power groups, and hot-swap capability, ideal for high-uptime, safety-critical applications in energy, water, and chemical industries.

Specifications

• Manufacturer: ABB

• Country of Origin: Estonia / Sweden

• Model Number: TU842

• Order Number: 3BSE020850R1

• Product Series: S800 I/O

• Mounting Type: Dual-slot for redundancy

• Rated Voltage: 24 V DC

• Maximum Current: 8 A per unit

• Process Connections: 16 channels (Group isolated)

• Approximate Weight: 0.55 kg

Features

• Redundancy Support: Dual-module mounting capability eliminates single points of failure for critical output loops.

• Seamless Field Wiring: Consolidates wiring for 16 channels into a single, organized terminal block for both primary and backup modules.

• Hot-Swap Performance: Internal circuitry allows for the extraction and insertion of I/O modules while the station remains under power.

• Mechanical Security: Includes individual mechanical keying for each slot to prevent the installation of incorrect module types.

• Enhanced Protection: Built-in fuse points and isolation barriers protect the ModuleBus from field-side electrical disturbances.