Overview
The ABB TK801V003, also cataloged as the 3BSC950089R1 ModuleBus Extension Cable, operates as a dedicated hardware component for extending the electrical ModuleBus between distributed I/O stations within the S800 I/O system.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | TK801V003 |
| Article Number | 3BSC950089R1 |
| Brand | ABB |
| Series | S800 |
| Origin | Sweden |
| Weight | 0.1 kg |
| Dimensions | 15.2 x 7.6 x 12.7 cm |
| Cable Length | 0.3 m |
| Connector Type | D-Sub 25, Male to Female |
| Shielding | Shielded |
| Data Rate Support | Up to 10 Mbps |
| Operating Temperature | -20 deg C to +70 deg C |
| Storage Temperature | -40 deg C to +85 deg C |
| Tariff Code | 8537101190 |
Backplane Bus Communication Velocity Licences
The TK801V003 maintains signal integrity for ModuleBus communication by supporting data rates up to 10 Mbps. It ensures deterministic data exchange between the controller interface module (TB805/TB845 or TB806/TB846) and distributed I/O clusters. The shielded construction minimizes electromagnetic interference on the backplane bus, preserving bit-level synchronization across extended DIN rail segments.
Frequently Asked Questions
Q: Can the TK801V003 be used to connect I/O modules across different electrical ModuleBus segments?
A: No. This cable is designed to extend the same electrical ModuleBus. It allows I/O modules on the same segment to be physically mounted on separate DIN rails but does not bridge distinct bus segments.
Q: Is hot-swapping supported when using this extension cable?
A: Hot-swapping is not supported. Power must be removed from the ModuleBus segment before connecting or disconnecting the TK801V003 to prevent damage to the D-Sub 25 connectors and ensure data link integrity.
Field Installation Guidelines
Mount the cable along the DIN rail ensuring minimum bend radius is maintained. Connect the male connector to the source interface module and the female connector to the target interface module. Ensure the shield is properly terminated at both ends according to ABB S800 grounding practices to minimize ground loops and EMI susceptibility. Verify that the mechanical locking clips on the D-Sub connectors are fully engaged before energizing the system.
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