Description
- Brand: ABB
- Full Model Number: TK821V020 / 3BSC950202R1
- Product Type: Prefabricated Battery Cable
- Lifecycle Status: Active ABB spare for System 800xA / AC 800M battery backup arrangements
- Core Function in System: Connects the external SB822 rechargeable battery unit to an AC 800M controller for memory-backup power
- Top 3 Hardcore Specs: 2.0 m cable length | 2-core prefabricated cable | 0.75 mm² conductor cross-section per core
- Compatible Battery Unit: SB822 3BSE018172R1
- Application: AC 800M controller memory backup
- Operating Temperature: 0 to +60 °C
- Net Weight: 0.1 kg
- Condition & Lead Time: New stock subject to availability; expedited dispatch for stocked units
ABB’s current System 800xA catalog explicitly lists TK821V020 as the connection cable supplied with the SB822 rechargeable battery unit, while ABB’s product data identifies 3BSC950202R1 as a 2.0 m prefabricated battery cable.
Module 3: Technical Intro & Downtime Impact
A backup-battery cable is easy to overlook until the controller loses its memory-retention path during a power interruption. ABB TK821V020 3BSC950202R1 provides the dedicated connection between the external SB822 rechargeable battery unit and compatible AC 800M controller installations. ABB’s current System 800xA catalog confirms that the SB822 package includes the TK821V020 cable specifically for AC 800M battery backup.
The hard specifications are simple but important: 2.0 m length, 2-core construction, and 0.75 mm² conductor cross-section per core. ABB lists a product net weight of approximately 0.1 kg. The cable itself is not a programmable device, so there is no firmware image, parameter set, or application memory to transfer. MTTR is mainly affected by correct connector matching, cable routing, polarity, and verification that the SB822 battery backup path is actually restored after installation. A field note: a visually similar two-wire cable is not necessarily an acceptable substitute; connector geometry and electrical compatibility with the /AC 800M arrangement must be confirmed.
ABB TK821V020 3BSC950202R1
Module 4: Dynamic Emergency Swap & Configuration Guide
1. Pre-Swap Prep — Identify the Battery Path
Follow the plant’s approved maintenance procedure before disturbing the backup-power circuit. Record the installed battery-unit identification, AC 800M controller model, cable routing, connector orientation, and the existing TK821V020 label. Photograph both ends of the cable before removal.
Do not rely on cable length alone. ABB identifies the exact cable as TK821V020 / 3BSC950202R1.
2. Removal — Disconnect Both Ends Without Pulling the Cable
Isolate the applicable controller/battery circuit according to the equipment procedure. Release the connector at the side and the corresponding controller-side connector by the connector housing rather than pulling on the conductors. Remove the cable from its existing cabinet routing and inspect both mating connectors for contamination, oxidation, or mechanical damage.
The assembly is a lightweight 2.0 m prefabricated cable, not a PCB or rack card. ABB lists approximately 0.1 kg net weight.
3. Installation & Configuration — Match the Original Connection
Route the replacement cable along the same cabinet path and connect each end to the corresponding mating interface. Confirm that the replacement is and that the battery unit is the compatible 3BSE018172R1 arrangement. ABB’s catalog explicitly pairs the with .
There is normally no address setting, DIP-switch programming, or firmware loading on this cable. Correct physical connection is the configuration.
4. Power-On Self-Test (POST) — Verify Battery Backup Recognition
Restore the system according to the approved commissioning procedure. Check the controller’s battery-backup status and confirm that the is properly connected. Where the controller diagnostics provide battery or backup-power status, verify that no battery-circuit alarm remains active.
Then perform the site’s approved backup-power verification rather than simply checking continuity. The objective is to prove that the battery can support the intended controller memory-retention function. ABB specifies the as a rechargeable battery unit for AC 800M controllers, with a 3.6 V rated output and 0.05 A maximum output current.
Module 5: Quality Assurance & Testing SOP
Each available ABB / 3BSC950202R1 should pass a documented cable-level QA process:
- OEM anti-counterfeit visual inspection — verify ABB markings, designation, 3BSC950202R1 identification, connector construction, cable jacket, and termination quality.
- Part-number reconciliation — match the cable against the customer’s AC 800M/ BOM.
- Dimensional verification — confirm the nominal 2.0 m cable length. ABB lists 2.0 m in the product data.
- Conductor inspection — verify the two-core construction and check conductor cross-section against the documented 0.75 mm² per core specification.
- Continuity test — verify end-to-end continuity for both conductors individually.
- Polarity verification — identify and record conductor polarity/pin correspondence against the approved ABB connection drawing or known-good reference cable.
- Insulation check — perform an appropriate low-voltage cable insulation/short-to-shield or conductor-to-conductor test where applicable to the cable construction.
- Connector retention inspection — verify locking features, strain relief, contact alignment, and mating integrity.
- interface test — connect the cable to a compatible test assembly and verify battery-path continuity and correct controller-side recognition.
- Battery-backup simulation — where the laboratory setup permits, interrupt the primary controller supply under a controlled procedure and verify the expected battery-backup behavior.
- Post-test inspection — inspect the cable for connector displacement, conductor damage, excessive bend radius, or jacket deformation.
- Final QA record — retain label photographs, length/conductor measurements, continuity results, polarity verification, interface-test results, and final packaging photographs.
ABB’s current documentation confirms that 3BSE018172R1 is an external DIN-rail-mounted rechargeable battery unit for AC 800M controllers and specifically includes as its connection cable.
Module 6: Maintenance & Reliability FAQ
Is the ABB 3BSC950202R1 a direct replacement?
Yes, when the original installation specifically calls for . ABB identifies it as a 2.0 m prefabricated battery cable, and the current System 800xA catalog explicitly associates it with the AC 800M battery unit. Verify the controller and battery-unit models before substitution.
Does the require a firmware flash or software configuration?
No. This is a prefabricated cable, not a CPU, communication card, or programmable device. There is no firmware image to load. Correct installation consists of matching the physical interfaces, routing, and polarity to the approved system design.
Is it safe to replace the while the AC 800M system is running?
Do not assume that it is safe to disconnect the battery cable under normal operating conditions. Removing the cable can interrupt the controller’s backup-power path and may create a battery or memory-backup alarm. Follow the applicable ABB installation procedure and plant maintenance rules before disconnecting either end.
Will replacing the battery cable erase my AC 800M program?
The cable does not contain the controller application or configuration data. However, the exists specifically to provide battery backup for the AC 800M controller, so disconnecting the backup path can affect memory retention during a subsequent power interruption. ABB describes as a rechargeable battery unit for AC 800M controllers. Maintain a current controller backup before planned maintenance.
What should I verify before ordering an emergency spare?
Confirm , 3BSC950202R1, 2.0 m length, and the intended 3BSE018172R1 battery application. ABB’s product data identifies the cable as a 2.0 m prefabricated cable, while current ABB documentation explicitly shows supplied with . A clear photograph of both connectors is also useful when checking an emergency replacement.
What are the warranty terms if the cable fails after installation?
Warranty depends on the supplying party and purchase agreement. Confirm the warranty period, DOA policy, and return conditions before shipment. Keep the pre-shipment continuity and polarity test record; for a passive cable, those records provide a clean baseline when troubleshooting a later battery-backup alarm.
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