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ABB 3BSC950193R1 TB850

Product overview

• Manufacturer: ABB
• Type designation: TB850
• Part number: 3BSC950193R1
• Product type: CEX-Bus Terminator / bus accessory
• System family: ABB AC 800M / System 800xA control systems

Function
The ABB TB850 is a CEX-Bus termination unit used to properly terminate the CEX communication bus in ABB AC 800M-based automation systems. It prevents signal reflections and helps maintain reliable communication on the bus.

Key specifications

• Connector: 25-pin DB25P male connector
• Mounting: Screw fixing
• Installation requirement: Must be installed on the last unit of the CEX-Bus line
• Net weight: Approximately 0.04 kg
• Typical dimensions: about 55 mm depth, 50 mm width, 16 mm height

Compatible applications

• ABB AC 800M controller systems
• ABB System 800xA automation platforms
• CEX-Bus communication interface assemblies

Related parts

• TK850V007 (3BSC950192R1): CEX-Bus extension cable
• TB851 (3BSC950194R1): Alternative CEX-Bus terminator with DB25S female connector for certain cable configurations

Replacement notes
When replacing a TB850, verify:

1. The existing module uses a DB25P male CEX-Bus connection.
2. The terminator is located at the end of the CEX-Bus chain.
3. The replacement part number matches 3BSC950193R1.