Introduction
The ABB TK821V020 (3BSC950202R1) ModuleBus Extension Cable is an industrial communication cable designed for ABB S800 I/O and AC 800M automation systems. It is used to extend the ModuleBus connection between terminal bases and I/O modules, enabling flexible and distributed installation layouts inside control cabinets.
This cable is part of ABB’s prefabricated communication accessories, designed to ensure stable signal transmission and simplified wiring in complex automation architectures.
Technical Specifications
| Item | Description |
|---|
| Product Type | ModuleBus Extension Cable |
| Model | TK821V020 |
| Part Number | 3BSC950202R1 |
| Manufacturer | ABB |
| System Compatibility | ABB S800 I/O / AC 800M / 800xA |
| Cable Type | Prefabricated shielded communication cable |
| Cable Length | 2.0 m |
| Connector Type | Industrial D-sub / ModuleBus connectors |
| Communication Function | ModuleBus signal extension |
| Installation Type | Control cabinet / DIN rail system |
Applications
The TK821V020 cable is commonly used in:
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ABB S800 I/O distributed control systems
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ABB AC 800M controller architectures
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ABB 800xA automation platforms
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Industrial process control cabinets
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Large-scale distributed I/O installations
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Manufacturing and utility automation systems
It supports flexible cabinet design where I/O modules are installed across different DIN rail sections while maintaining consistent ModuleBus communication.
Technical FAQs
1. What is the main function of TK821V020?
It extends ModuleBus communication between ABB I/O modules.
2. What is the cable length?
The cable length is 2.0 meters.
3. Which ABB systems use this cable?
ABB S800 I/O, AC 800M, and 800xA systems.
4. Is the cable shielded?
Yes, it uses industrial shielding for stable communication.
5. What type of communication does it support?
ModuleBus communication between I/O modules.
6. Is it prefabricated?
Yes, it is supplied as a ready-to-install cable assembly.
7. Can it be used across DIN rails?
Yes, it supports distributed cabinet layouts.
8. Does it require configuration?
No software configuration is required.
9. What is its main advantage in system design?
It simplifies distributed I/O architecture wiring.
10. Is it suitable for industrial environments?
Yes, it is designed for continuous industrial automation use.
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