ABB TU846 high-reliability Module_Xiamen XingRuiJia Import and Export CO,LTD

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Model：ABB TU846 high-reliability Module

Brand: ABB 2025-11-12
Price range (USD): 2000-4000
Country: Sweden
Parameter: Input Voltage: 24 V DC

Operating Temperature: -20 °C to +60 °C (Storage -40 °C to +85 °C)

Communication Protocols: PROFIBUS, HART, Modbus, etc.

Channel Density: Supports dozens of I/O modules depending on system configuration

Mounting Method: DIN-rail mounting (vertical or horizontal), supports hot swapping

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ABB TU846 Overview

The ABB TU846 is a Module Termination Unit (MTU) in the ABB S800 Distributed I/O System, specifically designed to host CI840 or CI840A communication interface modules. It provides power supply, communication links, redundancy connections, and field signal access. TU846 is commonly used in industrial automation systems that require high channel density and reliable redundancy.
ABB TU846

1. Main Functions

Function	Description
Power Supply	Accepts a 24 V DC input and delivers stable power to the mounted I/O modules.
Redundant I/O	Supports dual CI840 module redundancy to ensure fault tolerance and data integrity.
Communication Interface	Equipped with two PROFIBUS (or other fieldbus) ports and a service tool interface, compatible with HART, Modbus, and other protocols.
Hot-Swappable Modules	Allows field hot swapping for easier maintenance and system expansion.
Protection Rating	Rated at IP65 for use in harsh industrial environments.
Dimensions & Weight	Depth 47 mm, height 186 mm, width 124 mm, weight ≈ 0.5 kg.

2. Technical Specifications (Typical Values)

Input Voltage: 24 V DC

Operating Temperature: -20 °C to +60 °C (Storage -40 °C to +85 °C)

Communication Protocols: PROFIBUS, HART, Modbus, etc.

Channel Density: Supports dozens of I/O modules depending on system configuration

Mounting Method: DIN-rail mounting (vertical or horizontal), supports hot swapping

3. Typical Applications

Process Control Systems: Field signal acquisition and control in continuous process industries such as chemicals, oil & gas, and metallurgy.

Machine Manufacturing: High-speed I/O acquisition and safety redundancy for CNC machines and assembly lines.

Energy Management: Integration of multi-point sensors and actuators in power plants and distribution automation.

Large-Scale Facilities: High-reliability, redundant control for systems such as water treatment and exhaust gas management.

Summary

The ABB TU846 is a high-reliability Module Termination Unit designed for the ABB S800 system. It offers 24 V DC power, dual PROFIBUS redundant interfaces, IP65 protection, and hot-swappable functionality, making it ideal for automation projects requiring large I/O capacity, redundancy assurance, and robust performance in demanding industrial environments.

ABB TU846