ABB TK821V020 (3BSC950202R1) Battery Cable | Replacement, Equivalent & Selection Guide
The ABB TK821V020 (part number 3BSC950202R1) is a dedicated battery cable designed for use with ABB AC800M Distributed Control System (DCS) controllers. It provides a reliable power connection between the controller module and its backup battery unit, ensuring uninterrupted memory retention and safe system shutdown during power loss events. Konmask.com supplies genuine and compatible equivalents for industrial automation procurement worldwide.
Technical Specifications
| Parameter | Detail |
|---|---|
| Manufacturer | ABB |
| Part Number (SKU) | TK821V020 |
| Reference Number | 3BSC950202R1 |
| Description | Battery Cable |
| Compatible Platform | ABB AC800M DCS Controller Series |
| Cable Length | 0.20 m (20 cm) |
| Weight | approx. 300 g (packaged) |
| Connector Type | Proprietary ABB battery connector |
| Operating Temperature | 0 °C to +55 °C |
| Country of Origin | — |
| RoHS Compliant | Yes |
Compatible Replacement & Equivalent Models
When sourcing a replacement for the ABB TK821V020 / 3BSC950202R1, the following models and accessories are commonly evaluated:
| Model | Description | Compatibility Note |
|---|---|---|
| TK821V020 | Original ABB Battery Cable (20 cm) | Direct OEM part |
| 3BSC950202R1 | ABB reference number for TK821V020 | Same part, alternate ordering code |
| TK821V010 | ABB Battery Cable (10 cm variant) | Shorter version; verify clearance before substituting |
| TK821V030 | ABB Battery Cable (30 cm variant) | Longer version; suitable where routing space allows |
| TA521 / TA524 | ABB Battery Unit for AC800M | Paired device — cable must match battery unit connector |
Note: Always verify connector pinout and cable length against your specific AC800M controller revision before ordering a substitute.
Why Choose the Original ABB TK821V020
- Guaranteed fit: Engineered specifically for ABB AC800M controller battery interfaces — no adapter required.
- Signal integrity: Shielded conductors maintain stable low-voltage battery signaling under industrial EMI conditions.
- Warranty compliance: Using OEM cables preserves ABB system warranty and simplifies audit documentation.
- Long service life: Industrial-grade insulation rated for continuous duty in control cabinet environments.
- Traceability: Dual part numbering (TK821V020 / 3BSC950202R1) simplifies cross-referencing in MRO and ERP systems.
Typical Applications
- ABB AC800M PM851, PM856, PM860, PM861, PM864, PM866 controller battery backup wiring
- DCS cabinet battery retention during planned and unplanned power outages
- SRAM and real-time clock memory backup in process automation controllers
- Oil & gas, chemical, power generation, and pulp & paper plant DCS maintenance
- Spare parts kits for AC800M-based control system overhauls
System Compatibility
| ABB Platform | Compatible | Notes |
|---|---|---|
| AC800M (all PM8xx variants) | ✔ Yes | Primary target platform |
| AC800F | ✘ No | Different battery interface |
| AC500 PLC Series | ✘ No | Separate battery cable family |
| Symphony Plus (S+ series) | Verify | Consult ABB documentation |
| Freelance DCS | ✘ No | Incompatible connector |
Selection Guide
Use the following decision flow to select the correct battery cable for your AC800M system:
- Identify your controller module: Confirm the PM8xx variant installed in your cabinet (e.g., PM856, PM864).
- Check battery unit model: Locate the TA521 or TA524 battery unit — the cable must match its connector.
- Measure available routing length: TK821V020 = 20 cm. If routing requires more slack, consider TK821V030 (30 cm).
- Verify revision compatibility: Cross-reference ABB product changelog for your firmware revision if using a non-OEM equivalent.
- Confirm quantity: Each PM8xx controller requires one battery cable. Order spares for critical systems.
Quality Assurance & Sourcing
- Konmask.com sources ABB automation components through authorized distribution channels and verified secondary market suppliers.
- All parts undergo visual inspection and cross-reference verification against ABB part number databases prior to dispatch.
- Certificates of conformity and packing lists are available upon request for MRO and EPC procurement teams.
- Lead time: typically in-stock or 3–7 business days for standard orders; expedited sourcing available for urgent plant shutdowns.
How to Order
- Add ABB TK821V020 / 3BSC950202R1 to your cart on Konmask.com.
- Specify quantity and any required documentation (CoC, test report, packing list).
- For bulk or project orders, contact support@konmask.com for a formal quotation.
- Payment via T/T, PayPal, or trade credit (approved accounts).
- Shipping: DHL / FedEx / UPS express worldwide; sea freight for large consignments.
Replacement & Compatibility FAQ
Q: Can I use TK821V010 instead of TK821V020?
A: The TK821V010 is 10 cm shorter. It will function electrically if the connector matches, but verify physical routing clearance inside your cabinet before substituting.
Q: Is 3BSC950202R1 the same as TK821V020?
A: Yes. 3BSC950202R1 is ABB’s internal reference number for the TK821V020 battery cable. Both codes refer to the identical part.
Q: Does this cable work with AC500 PLCs?
A: No. The AC500 series uses a different battery cable family. Please contact us with your AC500 model number for the correct part.
Q: What happens if the battery cable fails?
A: The AC800M controller will lose battery-backed SRAM retention. On power loss, program memory and real-time clock data may be lost. Replace immediately upon detection of battery fault alarms.
Q: Do you supply the battery unit (TA521/TA524) as well?
A: Yes. Konmask.com stocks a range of AC800M battery units and accessories. Contact us for a bundled spare parts quotation.
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