Overview
The ABB TK850V007, also cataloged as the 3BSC950192R1 CEX-Bus Extension Cable, operates as a dedicated hardware component for extending the Controller Extension Bus within ABB AC 800M controller and Advant-800xA distributed control system platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | TK850V007 |
| Spare Model | 3BSC950192R1 |
| Brand | ABB |
| Origin | SWEDEN |
| Weight | 0.3 kg |
| Dimensions | 20x18x7 cm |
| Voltage Rating | <24 VDC |
| Current Rating | <50 mA typical |
| Operating Temp | -25 to +70 deg C |
| Cable Length | 0.7 m |
| Connectors | DB-25 Male to DB-25 Female |
| Shielding | Fully shielded |
| Bend Radius | Minimum 5x cable diameter |
| Tariff Code | 8537101190 |
Backplane Bus Communication Velocity and Determinism
The TK850V007 functions within the deterministic communication framework of the AC 800M hardware architecture. It preserves backplane bus communication velocity across extended configurations, ensuring synchronization across communication interface modules without introducing significant transmission propagation delays. The integrated shielding controls signal integrity to maintain internal bus timing requirements and minimize packet retransmissions across the CEX-Bus backplane.
Frequently Asked Questions
Q: Can the TK850V007 cable be hot-swapped while the AC 800M controller is energized?
A: No. Breaking or establishing CEX-Bus connections while the backplane is powered can disrupt the bus communication velocity, cause processor faults, or damage data transceivers. Power down the controller subrack prior to installation or removal.
Q: Is a bus terminator required when using the TK850V007 extension cable?
A: Yes. Any extension of the CEX-Bus requires appropriate termination to prevent signal reflection. This cable requires mandatory compatibility with the TK851 terminator at the end of the physical bus segment.
Field Installation Guidelines
- Bend Radius Enforcement: Do not exceed the minimum bend radius of 5x the cable diameter during routing. Sharp bends alter coaxial geometry, impacting impedance matching and degradation of backplane bus communication velocity.
- Connector Securing: Ensure the DB-25 male and female connectors are completely seated. Tighten the integral retention screws to prevent intermittent connection failures caused by industrial vibration profiles.
- Separation from High-Voltage: Route the CEX-Bus cable away from high-voltage AC lines, variable frequency drives, and heavy inductive loads to prevent electromagnetic interference from compromising the low-voltage DC data lines.
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