ABB TK821V020 (3BSC950202R1) – 20 m pre-terminated system cable for AC 800M / S800 I/O expansion

The ABB TK821V020, part number 3BSC950202R1, is a factory-terminated system cable typically used in 800xA installations to link AC 800M controllers with CEX/S800 I/O expansion hardware. From my experience, it’s chosen when teams want reliable, EMI-resilient cabinet wiring without the risks of field-assembled harnesses. The “V020” suffix indicates a 20‑meter length, which seems to be the sweet spot for most mid-sized cabinets and cross-panel runs.

Order Placement Process and Guarantees

• 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

Key Features

• 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.

Technical Specifications

Application Fields

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

Advantages & Value for Procurement

• 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.

Installation & Maintenance

• 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.

Quality & Certifications

• Conformity: CE
• Material compliance: RoHS
• Typical recognition: UL/cUL (series-dependent)
• Warranty: 12 months (365 days)

Related/Supporting Models

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.