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ABB TB807 3BSE008538R1

ABB TB807 (3BSE008538R1) is a Modulebus Terminator used in the ABB S800 I/O system. It is a passive termination unit designed to terminate the Modulebus communication line, helping maintain signal integrity and reliable communication within ABB distributed control system (DCS) installations.

Product Description

Manufacturer: ABB
Model: TB807
Article Number: 3BSE008538R1
Product Type: Modulebus Terminator / Passive Termination Unit
System Family: ABB S800 I/O, System 800xA hardware platform

The TB807 provides proper electrical termination for the Modulebus network. It is installed at the end of a Modulebus segment to reduce signal reflections and improve communication stability between S800 I/O modules and the controller system.

Technical Specifications

Dimensions

• Width: approx. 17 mm
• Depth: approx. 13 mm
• Height: approx. 19 mm
• Weight: approx. 10 g

Applications

ABB TB807 is commonly used in:

• ABB System 800xA Distributed Control Systems (DCS)
• ABB Advant Controller environments
• S800 I/O Modulebus communication networks
• Process automation systems
• Power generation, oil & gas, chemical, and industrial plants

It is typically installed together with ABB S800 I/O components to ensure stable Modulebus communication and reliable remote I/O operation.

Key Features

• Original ABB S800 I/O accessory
• Passive Modulebus termination device
• Improves communication reliability
• Compact DIN rail compatible design
• Suitable for industrial environments
• Supports ABB System 800xA automation architectures

Conclusion

The ABB TB807 3BSE008538R1 Modulebus Terminator is a small but essential component in ABB S800 I/O systems. By providing correct termination of the Modulebus network, it helps prevent communication errors and ensures stable operation of ABB DCS and process control systems. It is widely used as a maintenance spare part for existing ABB System 800xA installations.