ABB TU840 3BSE020846R1 Module Termination Unit

Engineered with high reliability and modularity, the TU840 supports hot-swap capability and reduces downtime during maintenance and module replacement. Its design is aligned with ABB’s vision of creating flexible, scalable, and high-performance automation solutions suitable for complex process industries.

Technical Specifications

Applications

The TU840 terminal unit is used in a wide range of industrial automation and process control applications, particularly in scenarios requiring reliable I/O interfacing and signal integrity. Common applications include:

• Oil & Gas – SCADA systems, field signal conditioning, remote terminal units

• Power Generation – Turbine control, DCS integration

• Water & Wastewater – Plant automation, telemetry systems

• Chemicals & Petrochemicals – Hazardous area signal handling, batch automation

• Pharmaceuticals – Process control systems, compliance monitoring

• Manufacturing & Robotics – Machine control, modular I/O rack systems

Product Advantages

• Reliable Signal Interface: Offers robust and interference-resistant connections for analog and digital signals.

• Efficient Wiring: Designed to simplify field wiring with screw terminals and clear marking.

• Modular Design: Enables quick maintenance and module replacement without process disruption.

• Compatibility: Seamlessly integrates with ABB AC 800M and S800 I/O modules.

• Compact Footprint: Saves space in control cabinets due to its slim and vertically oriented design.

• Industrial Durability: Built to withstand extreme industrial environments with wide temperature and humidity tolerance.

• Time-Saving Installation: DIN rail mountable and preconfigured terminal labeling accelerates installation and commissioning.

• Global Compliance: Fully certified to meet international industrial standards for safety and reliability.

Frequently Asked Questions (FAQ)

1. What is the primary function of the TU840 terminal unit?

   The TU840 acts as an interface between field devices and I/O modules in ABB’s S800 system, ensuring signal integrity and simplified wiring.

2. Is the TU840 compatible with all ABB I/O modules?

   It is primarily designed for use with S800 I/O modules and the AC 800M controller.

3. Can the TU840 be used in high-temperature environments?

   Yes, it supports operating temperatures from -40°C to +70°C, making it suitable for harsh industrial settings.

4. Does the TU840 support hot-swapping of modules?

   Yes, modules can be replaced without shutting down the system, minimizing downtime.

5. How is the TU840 mounted in control systems?

   It can be DIN rail mounted or directly mounted, offering installation flexibility.

6. Are the terminal connections shielded?

   Yes, the terminal unit provides internal shield connections for grounded signal wiring.

7. What kind of signals can the TU840 handle?

   It supports both analog and digital I/O signals from various industrial field instruments.

8. Is it possible to replace the TU840 without rewiring the field connections?

   Yes, the terminal unit is designed for quick module replacement while preserving field wiring.

9. What maintenance does the TU840 require?

   Minimal maintenance is needed beyond periodic inspections and ensuring terminal tightness.

10. Is this model certified for use in international markets?

    Yes, the TU840 holds CE, UL, cUL, and RoHS certifications.