The ABB TU831V1 (3BSE013235R1) is a Module Termination Unit (MTU) designed for use with ABB’s S800 I/O system, part of the broader System 800xA control platform. It serves as a connection interface between the field wiring and the I/O modules, specifically those that plug into rear-mounted base plates. The TU831V1 provides robust signal integrity, compact form factor, and simplified wiring for analog or digital signals, enabling high-density I/O configurations in process automation.

It includes screw-type terminals for secure wiring and integrates features like fuse protection, channel diagnostics, and labeling options, making it ideal for modular distributed control architectures in various industrial sectors.

Key Features

• Module Termination Unit for S800 I/O modules

• Compact design for cabinet space optimization

• Screw terminal blocks for secure, field-friendly wiring

• Supports 16 I/O channels per module

• Field connection interface for I/O modules such as AI801, DI801, DO801, etc.

• Fuse holder slots available (optional configuration)

• Clear channel labeling for easy maintenance

• DIN rail mountable for fast integration into panel systems

• Part of ABB’s System 800xA for distributed automation

• Compatible with redundant and single-channel systems

Technical Specifications

Industry Applications

The ABB TU831V1 is widely used in industries requiring reliable field connectivity and modular control solutions:

• Oil & Gas – Distributed control for refineries and offshore platforms

• Power Generation – Turbine and plant control in thermal, hydro, and nuclear facilities

• Chemical & Petrochemical – Process automation with high channel count I/O

• Water & Wastewater – Pump control, remote valve management, SCADA integration

• Pharmaceuticals – GMP-compliant automation systems

• Pulp & Paper – High-density signal wiring for large plant layouts

• Mining & Metals – Harsh environments needing robust I/O architecture

Product Advantages

• Compact footprint reduces cabinet space requirements

• Direct connection to rear-mounted I/O modules improves design flexibility

• Field-friendly screw terminals support fast, reliable installation

• DIN rail mountable, simplifying panel integration

• Cost-effective and serviceable with optional fusing capability

• High signal integrity and mechanical robustness

• Fully integrated with System 800xA architecture

• Clear wiring layout and labeling minimizes commissioning and maintenance time

• Versatile use across analog and digital module types

• Global certifications support deployment in a wide range of industries and geographies

Frequently Asked Questions (FAQ)

1. What is the TU831V1 used for?

It acts as the termination interface for field signals connecting to ABB S800 I/O modules.

2. What kind of I/O modules are compatible with TU831V1?

It supports rear-mounted S800 I/O modules, such as AI801, DI801, DO801, and others.

3. Does the unit support fusing?

Yes, it has optional fuse holder slots to protect individual channels.

4. Is the unit DIN-rail mountable?

Yes, it supports 35 mm DIN rail installation.

5. How many channels does TU831V1 support?

It supports 16 channels per module.

6. What is the wire size supported?

It accommodates wires from 0.5 mm² to 2.5 mm², solid or stranded.

7. Can TU831V1 be used in redundant systems?

Yes, it supports both redundant and single-channel I/O setups.

8. Is it suitable for analog or digital signals?

It can be used for both analog and digital modules, depending on the I/O card used.

9. Does it provide channel diagnostics?

Not directly, but connected I/O modules can report diagnostics via the control system.

10. What standards does it comply with?

It complies with CE, RoHS, IEC/EN 61131-2, and UL/cUL standards.