Overview

The ABB TU843 Module Termination Unit (MTU) is engineered to interface between the field wiring and the I/O modules of ABB’s AC 800M control system. It is part of the S800 I/O family, known for its flexibility, modularity, and high availability, making it ideal for redundant analog and digital I/O configurations in process automation.

Designed for vertical DIN rail mounting, the TU843 simplifies installation in compact control cabinets. The unit supports hot-swappable I/O modules, allowing system upgrades and maintenance without the need for system downtime. Its redundancy optimization ensures continuous operation, even in the event of a failure of one I/O module.

This MTU features robust signal integrity, secure terminal connections, and clear labeling, making it ideal for mission-critical applications in industries like oil & gas, power generation, and chemical processing.

Technical Data / Specifications

Typical Applications / System Integration

The TU843 is widely used in distributed control systems (DCS) that require high availability and fault tolerance. It is typically deployed in industries where uninterrupted operation is critical. Common applications include:

• Oil & Gas: Redundant control for valves, pumps, and safety systems.

• Power Generation: Monitoring and control for turbines, switchgear, and substations.

• Chemical Processing: Ensures stable operation of batch and continuous processes.

• Water Treatment: Reliable sensor and actuator integration within SCADA systems.

• Pharmaceutical Manufacturing: Maintains compliance and uptime in regulated environments.

The modular design and redundancy support make the TU843 ideal for critical infrastructure and safety systems.

FAQ

Q: What controller system is the TU843 compatible with?
A: The TU843 is designed for ABB’s AC 800M control system and S800 I/O modules.

Q: Can it be used in redundant I/O configurations?
A: Yes, the TU843 supports redundant AO/DI/DO84X setups for high availability.

Q: What is the mounting method?
A: The TU843 mounts vertically on DIN rails, allowing for compact cabinet integration.

Q: Is hot-swapping supported?
A: Yes, I/O modules can be replaced without shutting down the system, thanks to its hot-swappable feature.

Q: What industries commonly use the TU843?
A: The TU843 is commonly used in industries such as oil & gas, power generation, chemical processing, water treatment, and pharmaceuticals.