TU842 3BSE020850R1 ABB Bailey

TU842 3BSE020850R1 ABB Bailey Central control module

Brand：ABB Model number：TU842 3BSE020850R1

Country of origin: Sweden Product weight：0.55KG

HS code：8517623990

Product Details：

Product Dimensions：

The TU842 is a ModuleBus Extension Termination Unit. It is specifically designed to manage the communication and power requirements for an extended segment of the S800 I/O ModuleBus.

Key Technical Parameters:

Product Type: ModuleBus Extension Termination Unit
Part Number: 3BSE020850R1
System Compatibility: ABB S800 I/O, typically used with AC 800M controllers
Function: Terminates the ModuleBus communication line and supplies power to the extended I/O segment. It connects the main ModuleBus to an extension cable.
Bus Connection: Provides connection points for the extension cable, facilitating communication with remote I/O clusters.
Redundancy Support: Often used in configurations supporting ModuleBus communication redundancy for increased system reliability.
Power Supply: Supplies the necessary operating power to the I/O modules installed on the extended segment.
Mounting: Designed for DIN-rail mounting within the S800 I/O mounting structure.
Environmental: Operates within the standard industrial temperature and humidity ranges defined for the S800 I/O series.

Product Advantages

The ABB TU842 offers several significant advantages for industrial control applications:

System Scalability: It enables the physical expansion of the S800 I/O system, allowing for the distribution of I/O modules over long distances from the controller. This is essential for large-scale processes.
Communication Reliability: When used in redundant configurations, it helps ensure high availability of the I/O communication, reducing the risk of system downtime due to communication failures.
Simplified Wiring: It acts as a dedicated termination point, simplifying the wiring and management of the ModuleBus extension, leading to faster installation and easier maintenance.
Robust Industrial Design: As part of the S800 I/O family, it is built to withstand harsh industrial environments, ensuring long-term operational stability.
Integrated Power Management: It efficiently supplies power to the remote I/O cluster, simplifying the power distribution design for the extended segment.

Important Considerations and Precautions

When installing and operating the TU842, the following should be considered:

Proper Termination: Ensure the ModuleBus extension cable is correctly connected and terminated according to ABB specifications to maintain signal integrity and system stability. Improper termination can lead to communication errors.
Power Requirements: Verify that the external power supply connected to the TU842 meets the specified voltage and current ratings, sufficient to power the TU842 and all I/O modules on the extended segment.
Cable Specifications: Use only the approved ABB ModuleBus extension cable with the correct length and shielding to guarantee reliable communication over the extended distance.
Grounding and Shielding: Strictly adhere to all grounding and shielding recommendations provided in the S800 I/O documentation to prevent electromagnetic interference (EMI) from disrupting communications.
System Documentation: Always refer to the official ABB S800 I/O and AC 800M system documentation for detailed installation, configuration, and troubleshooting procedures.

Product Applications

The ABB TU842 is primarily used in industrial automation and control systems that require geographically distributed I/O capabilities:

Distributed Control Systems (DCS): Used extensively in large-scale DCS architectures, such as those running on the ABB AC 800M controller, where I/O modules are spread across a wide plant area.
Process Industries: Found in industries like Oil and Gas, Chemical, Power Generation, and Pulp and Paper, where reliable and scalable control systems are critical.
Remote I/O Stations: Utilized to establish communication and power to remote I/O cabinets or field junction boxes that are distant from the main control room or controller.
Infrastructure Projects: Applied in large infrastructure control systems, such as water treatment plants or long-distance pipelines, to integrate scattered field instruments.

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