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ABB 3BSE008538R1

Product Overview

• Manufacturer: ABB
• Part Number: 3BSE008538R1
• Type Designation: TB807
• Product Type: Modulebus termination unit / terminator
• System Family: ABB S800 I/O, System 800xA / AC 800M automation systems

Function
The TB807 Modulebus Terminator is a passive end-of-bus component used on ABB Modulebus networks. It is installed at the end of an S800 I/O Modulebus segment to provide correct electrical termination, helping prevent signal reflections and ensuring reliable communication between I/O modules and the controller system.

Key Specifications

Typical Use

• Installed at the last position of an S800 I/O Modulebus chain
• Used with ABB AC 800M controllers and S800 I/O clusters
• Required for stable Modulebus communication

Related ABB Modulebus Accessories

• TB805 (3BSE008534R1): Modulebus extension outlet
• TB806 (3BSE008536R1): Modulebus extension inlet
• TB807 (3BSE008538R1): Modulebus terminator

Replacement / Procurement Notes
When replacing a TB807, verify:

1. The system is using ABB S800 I/O Modulebus architecture.
2. The terminator is fitted at the correct end of the Modulebus segment.
3. The part number matches 3BSE008538R1 to avoid incompatibility.