• ABB TU842 3BSE020850R1
  • ABB TU842 3BSE020850R1
  • ABB TU842 3BSE020850R1
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ABB TU842 3BSE020850R1 Module Termination Unit

ABB TU842 3BSE020850R1 Module Termination Unit

The ABB TU842 (3BSE020850R1) is a redundant, horizontal Module Termination Unit (MTU) designed for the S800 I/O system. It provides a robust interface for connecting field signals to I/O modules...

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Availability: In stock

SKU: TU842 3BSE020850R1
Vendor: ABB
Category: Module Termination Unit
Related Series:

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View full product details

The ABB TU842 (3BSE020850R1) is a redundant, horizontal Module Termination Unit (MTU) designed for the S800 I/O system. It provides a robust interface for connecting field signals to I/O modules while facilitating the distribution of the ModuleBus and process power.

Features

  • Supports up to 16 I/O channels with 3-wire connection capability.
  • Redundant configuration support for high-availability applications.
  • Integrated process power distribution (2+2 connections).
  • Mechanical keying system prevents the insertion of incorrect I/O modules.
  • Latching mechanism for secure DIN rail mounting and integrated grounding.
  • Distributes ModuleBus signals to I/O modules and subsequent MTUs.

Applications

  • Oil and Gas: Onshore processing plants and offshore drilling platforms.
  • Marine Engineering: Engine room automation and dynamic positioning systems.
  • Metallurgy and Mining: Blast furnace automation and converter control.
  • Water Treatment: Sewage treatment plants and remote pumping stations.

Technical Specifications

Model TU842 / 3BSE020850R1
Channels 16
Max Voltage 50 V
Max Current (per channel) 3 A
Max Current (process connection) 10 A
Dielectric Test Voltage 500 V AC
Operating Temperature 0 to +55 degC
Storage Temperature -40 to +70 degC
Mounting Horizontal, DIN Rail

Installation Guidelines

  • Ensure the DIN rail is properly grounded to provide a common reference for the MTU latching system.
  • Verify that mechanical keys are correctly set for the specific I/O module type to prevent improper installation.
  • Power down the system before inserting or removing any I/O modules from the MTU.
  • Maintain adequate spacing for ventilation to ensure operating temperatures remain within the 0 to +55 degC range.
  • Route field wiring away from high-EMI sources to maintain signal integrity.

FAQ

What is the TU842 (3BSE020850R1)?

It is a redundant, horizontal Module Termination Unit (MTU) designed for the ABB S800 I/O system, used for connecting field signals to I/O modules and distributing the ModuleBus.

How many I/O channels does it support?

The unit supports up to 16 I/O channels, with each channel featuring two I/O connections and one ZP connection.

How is the MTU configured for specific I/O modules?

The MTU uses four mechanical keys (two for each I/O module) with six positions each, allowing for 36 different mechanical configurations to prevent incorrect module insertion.