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Help CenterABB TK821V020 (3BSC950202R1) – 20 m Pre-terminated System Cable for AC 800M / S800 I/O Expansion
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Warranty: 365 days
Delivery: 1 week if in stock; no more than one month at the latest
Payment: 50% advance payment, full payment before delivery
Express options: FedEx, UPS, DHL
Factory-terminated, 20 m reach – Consistent quality and time-saving during commissioning, especially across adjacent cabinets.
Designed for AC 800M / S800 I/O expansion – Typically used on CEX/ModuleBus interconnections in ABB 800xA architectures.
Shielded construction – Helps maintain signal integrity in noisy environments with VFDs and high-current feeders nearby.
Reliable strain relief – Reduced risk of intermittent faults from vibration or tight bends in control cabinets.
EMC-friendly routing – Works well with standard industrial cable management and grounding practices.
Drop-in replacement – A straightforward swap for the same series; no re-termination required.
| Brand / Model | ABB TK821V020 (3BSC950202R1) |
| HS Code | 8544.42 (Insulated electric conductors, fitted with connectors) |
| Power Requirements | Not applicable (passive cable) |
| Length / Dimensions & Weight | 20 m; shipping weight typically under 2 kg |
| Operating Temperature | Typically −25 to +70 °C (TK821 series) |
| Signal Type | ABB CEX/ModuleBus electrical signaling (shielded, factory-terminated) |
| Interfaces / Connectors | Mates with ABB AC 800M / S800 I/O expansion ports (as per TK821 series termination) |
| Installation Method | Panel/cabinet routing; cable tray or wire duct; maintain bend radius and shielding continuity |
You’ll typically see the TK821V020 in ABB 800xA systems where AC 800M controllers interface with S800 I/O islands or CEX-based communication modules. It’s a good fit for:
Process industries: oil & gas, chemicals, life sciences, food & beverage
Power and utilities: power generation, substations, district heating
Pulp & paper, metals, cement: extended I/O and cabinet-to-cabinet links
Water & wastewater: distributed I/O over longer cabinet runs
Reduced integration risk – Factory terminations remove guesswork from pinouts and shield bonds.
Shorter installation time – Technicians can route and plug in immediately; fewer rework loops.
Consistency across cabinets – Identical assemblies help standardize spares and troubleshooting.
Long-term reliability – Better EMC performance compared with ad‑hoc field-made cables in many cases.
Straightforward replacement – Quick swap minimizes downtime during maintenance windows.
Cabinet environment – Install in clean, dry control cabinets; keep away from high-voltage feeders where possible.
Bend radius – Maintain a gentle bend radius (from my experience, at least 10× cable OD) to protect pairs and shielding.
Shielding & grounding – Ensure the factory shield termination remains intact; bond per ABB grounding guidelines.
Separation – Route separately from motor cables and VFD outputs to minimize coupling.
Strain relief – Support both ends; avoid hanging loads on the connectors.
Routine checks – Visual inspection during shutdowns; verify connectors are seated and free from dust or oxidation.
Firmware/config – When replacing a cable on a live system, plan a brief stop; no firmware update is needed, but a bus health check is good practice.
Conformity: CE
Material compliance: RoHS
Typical recognition: UL/cUL (series-dependent)
Warranty: 12 months (365 days)
If your layout needs different lengths, the same TK821 series is commonly available in nearby sizes such as TK821V010 (10 m) and TK821V030 (30 m). For system context, it’s typically used alongside AC 800M controllers (PM8xx) and S800 I/O/CEX modules.
You might notice that replacing improvised harnesses with TK821 series cables cleans up bus diagnostics. A maintenance lead at a chemicals plant told us their intermittent I/O dropouts disappeared after standardizing to these factory assemblies.
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