ABB 3BSE040364R1 TU834 Expansion Module Terminal Unit

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1. Product Overview

The ABB TU834 (Part No. 3BSE040364R1) is an expansion module terminal unit designed for the ABB S800 I/O system. It provides a reliable field wiring interface for S800 I/O expansion modules, enabling orderly and secure signal connections. The modular design allows easy installation and maintenance in industrial automation and process control systems.

2. Technical Specifications

• Model: TU834

• ABB Part Number: 3BSE040364R1

• Product Type: Expansion Module Terminal Unit

• Compatible System: ABB S800 I/O

• Compatible Modules: S800 I/O expansion modules

• Number of Channels: Up to 16 signal connections (typical)

• Connection Type: Screw terminals

• Wire Size:

  • Solid wire: 0.2 to 2.5 mm²

  • Stranded wire: 0.2 to 2.5 mm²

• Rated Voltage: Up to 250 V

• Rated Current: Up to 2 A per channel (application dependent)

• Mounting: DIN rail mounting

• Housing Material: Flame-retardant industrial plastic

• Protection Class: IP20

• Operating Temperature: -25 °C to +60 °C

• Environment: Industrial control cabinet

3. Key Advantages & Features

• Designed for S800 I/O – Fully compatible with ABB S800 I/O modules.

• Modular Design – Separate terminal unit simplifies wiring and maintenance.

• Clear Terminal Identification – Reduces wiring errors and commissioning time.

• Reliable Electrical Connection – High-quality screw terminals ensure stable long-term operation.

• Space-Saving Design – Compact structure suitable for high-density I/O installations.

4. Typical Applications

The TU834 terminal unit is widely used in:

• ABB 800xA automation systems

• Distributed Control Systems (DCS)

• Power, chemical, and petrochemical industries

• Metallurgy, pulp & paper, and cement plants

• Water and wastewater treatment

• Oil & gas, energy, and infrastructure projects

5. Installation & Usage Notes

• Module Compatibility – Verify compatibility between the TU834 and the selected S800 I/O module.

• Power Off Before Wiring – Always disconnect power before installation or maintenance.

• Correct Wiring – Follow terminal markings to avoid miswiring or short circuits.

• Proper Tightening – Tighten screw terminals to the recommended torque.

• Environmental Conditions – Install in a clean, dry, and well-ventilated control cabinet.