ABB TU847 3BSE022462R1 S800 I/O Module Termination Unit

The ABB TU847 is a passive Module Termination Unit (MTU) designed for redundant configurations with CI840/CI840A communication interfaces in the ABB S800 I/O system. It facilitates power, communication, and module connection for high-integrity and reliable process automation systems.

Key Features

• Supports redundant CI840/CI840A modules

• DIN rail mounting with secure latching

• Power and PROFIBUS communication terminals

• Integrated rotary switches for address setting (0–99)

• Supports ModuleBus Optical Port via TB806

• 36-position mechanical keying prevents misconnection

• Meets G3 environment compliance via TU847Z variant

Technical Specifications

Applications

• Redundant I/O station termination for CI840/CI840A in ABB 800xA systems

• Power and fieldbus termination in distributed control systems

• Industrial automation in chemical, energy, marine, and utility sectors

• Projects requiring robust environmental certification (ATEX Zone 2, G3 compliance)

Advantages

• Simplified redundancy setup with dual communication modules

• High configurability with mechanical keying

• Supports hot-pluggable fiber optic extension (via TB842 and TB806)

• Reliable DIN rail grounding with latch locking

• Compact design with efficient terminal organization

• Wide certification range for global project applicability

Frequently Asked Questions (FAQ)

Q1: What is the primary function of TU847?

A1: It serves as a termination unit for redundant CI840/CI840A communication modules in S800 I/O systems.

Q2: Can the TU847 be used in hazardous environments?

A2: Yes, it is certified for ATEX Zone 2 and cULus Class 1 Zone 2 environments.

Q3: Is TU847 hot-swappable?

A3: No, it must be powered down before replacement.

Q4: What type of communication connectors are used?

A4: It includes DSUB9 connectors for PROFIBUS and RJ45 for service ports.

Q5: What is the purpose of the rotary switches?

A5: They are used to set the station address for communication modules.

Q6: How many mechanical keying combinations are supported?

A6: There are 36 unique combinations to prevent incorrect module insertion.

Q7: Can the TU847 be mounted in any orientation?

A7: Yes, it supports both vertical and horizontal DIN rail mounting.

Q8: What modules are typically paired with TU847?

A8: CI840 or CI840A modules in redundant configurations.

Q9: Is TU847 compliant with environmental standards?

A9: Yes, it complies with RoHS, WEEE, and G3 environment via TU847Z.

Q10: Does it support optical communication?

A10: Yes, through the TB842 ModuleBus Optical Port via TB806.