• ABB TU890 3BSC690075R1
  • ABB TU890 3BSC690075R1
  • ABB TU890 3BSC690075R1
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ABB TU890 3BSC690075R1 Compact Module Termination Unit (MTU)

ABB TU890 3BSC690075R1 Compact Module Termination Unit (MTU)

Description

The ABB TU890 (3BSC690075R1) is a compact Module Termination Unit (MTU) specifically designed for the S800 I/O system. This passive unit serves as the primary interface for connecting field wiring...

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SKU: TU890 3BSC690075R1
Vendor: ABB
Category: Module Termination Unit
Related Series:

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Description

The ABB TU890 (3BSC690075R1) is a compact Module Termination Unit (MTU) specifically designed for the S800 I/O system. This passive unit serves as the primary interface for connecting field wiring and process power to I/O modules. It also facilitates the distribution of the ModuleBus to the I/O module and subsequent MTUs, while managing correct addressing through the shifting of outgoing position signals.

Features

  • Compact footprint designed for space-efficient S800 I/O installations.
  • Integrated ModuleBus distribution for seamless communication between modules.
  • Mechanical keying mechanism to prevent the insertion of incorrect I/O modules.
  • Secure latching device for stable DIN rail mounting.
  • Supports field signal and process power connections via 27 terminals.
  • Compatible with a wide range of S800 I/O modules, including AI890, AI893, AI895, AO890, AO895, DI890, and DO890.

Applications

The TU890 is widely utilized in industrial environments requiring high-density, reliable I/O termination, particularly in sectors such as:

  • Oil and Gas: Offshore platforms, wellhead collection stations, and storage facilities.
  • Chemical Processing: Hydrogenation units, flammable solvent storage, and chemical delivery pump stations.
  • Logistics and Safety: Power and safety interlock monitoring for hazardous liquid chemicals.
  • Coal Chemical Industry: Gasification islands and coking workshops.

Technical Specifications

Model TU890
Order Code 3BSC690075R1
Manufacturer ABB
Type Compact MTU
Max Rated Voltage 50 V
Nominal Voltage 24 V
Max Current per Channel 2 A
Process Connections 27 Terminals
Mounting DIN Rail (Horizontal)
Country of Origin Sweden

Installation Guidelines

  • Mounting: Ensure the unit is securely latched onto a standard DIN rail. The design supports horizontal mounting configurations.
  • Safety: Always power down the system before inserting or removing I/O modules from the MTU to prevent electrical arcing or damage to the ModuleBus.
  • Handling: Use proper ESD (Electrostatic Discharge) precautions when handling the MTU to protect internal components.
  • Wiring: Ensure all field wiring is properly terminated to the designated terminals. Verify that the mechanical keying matches the intended I/O module before installation.
  • Environment: Maintain the installation within the specified ambient temperature limits (up to 55 degC) to ensure long-term operational reliability.

FAQs

What is the ABB TU890?

The TU890 is a compact Module Termination Unit (MTU) designed for the ABB S800 I/O system, used to connect field wiring and power supply to I/O modules.

What type of terminal connection does it use?

It features 27 terminals for process connections (field signals) and acts as a critical component in compact S800 I/O system architectures.

What is the voltage rating?

The nominal voltage is 24 V DC, with a maximum rated voltage of 50 V.