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ABB 3BSE069964R1 TU852

ABB 3BSE069964R1 TU852 is a Module Termination Unit (MTU) designed for the ABB S800 I/O system. It is used in redundant I/O configurations to provide field wiring termination, signal distribution, and connection between S800 I/O modules and the ModuleBus.

1. Product Overview

The ABB TU852 is a 16-channel redundant MTU for S800 I/O modules. It is a passive interface unit mounted on a horizontal DIN rail, providing connections between field devices and ABB I/O modules. It also incorporates part of the ModuleBus structure, allowing communication and addressing between I/O modules.

Product Identification:

• Manufacturer: ABB
• Product Type: Module Termination Unit (MTU)
• Model: TU852
• Article Number: 3BSE069964R1
• System: ABB S800 I/O / System 800xA
• Application: Redundant I/O installations

2. Technical Parameters

3. Compatible ABB I/O Modules

The TU852 is designed for use with redundant ABB S800 I/O modules, including:

• AI843 Analog Input Module
• AO845A Analog Output Module
• DI840 Digital Input Module
• DI880 Digital Input Module
• DO840 Digital Output Module
• DO880 Digital Output Module
• DP840 Pulse Counter Module

4. Structural Composition

The TU852 consists mainly of:

• DIN rail mounting base
  Provides mechanical installation and grounding.
• Field wiring termination interface
  Provides terminal connections for up to 16 signal channels.
• Dual ModuleBus connections
  Supports redundant communication paths.
• 25-pin D-sub connectors
  Provides connection to compatible S800 I/O modules.
• Mechanical coding/keying system
  Helps prevent incorrect module insertion.

5. Product Features

Redundant Design

Supports redundant S800 I/O architectures, improving system availability for critical industrial applications.

High Channel Density

Provides termination for up to 16 I/O channels while maintaining compact cabinet installation.

Easy Installation

• Horizontal DIN rail mounting
• Integrated grounding through DIN rail latch
• Simplified field wiring connection

Industrial Reliability

Designed for harsh automation environments with ABB S800 I/O system requirements, including EMC compliance and industrial temperature ranges.

6. Application Fields

ABB TU852 is commonly used in:

• Process automation plants
• Oil & gas facilities
• Power generation systems
• Chemical and petrochemical industries
• Water treatment plants
• Manufacturing automation systems
• ABB System 800xA control systems

Typical applications include redundant analog and digital signal termination where high system availability is required.

7. Environmental Specifications

8. Conclusion

The ABB 3BSE069964R1 TU852 is a reliable redundant 16-channel S800 I/O Module Termination Unit designed for ABB System 800xA automation platforms. With dual ModuleBus support, 50 V field connections, and compatibility with key redundant AI/AO/DI/DO modules, it provides a compact and dependable interface between field instrumentation and ABB control systems.