Product Details
Configured for power failure memory retention in ABB System 800xA control systems, the ABB SB821 Battery Unit 3BSE018109R1 (SB821 Battery Unit) provides direct physical/electrical execution. It delivers continuous DC power to system volatile memory banks and Real-Time Clock (RTC) circuits during main power supply interruptions, maintaining program logic integrity and system parameters without external auxiliary power input.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | SB821 (3BSE018109R1) |
| Brand | ABB |
| Origin | Sweden |
| Weight | 0.5 kg |
| Dimensions | 85 mm x 136 mm x 59 mm |
| Operating Temp | Standard Control Panel Environmental Range |
| Power Consumption | Self-powered backup (3 V DC nominal cell circuit) |
| Battery Type | Lithium (90 g chemistry mass) |
| Minimum Backup Time | 1 month |
| Mounting Type | External DIN-rail mount |
| Included Accessories | Connection Cable TK821v020 |
Firmware Flash Compatibility and Memory Retention Architecture
The module interfaces directly with controller backplane power buses to manage static random-access memory (SRAM) retention states. Firmware flash compatibility across the ABB System 800xA architecture ensures synchronized voltage monitoring during power-down sequences. The external battery configuration offloads thermal and chemical constraints from the main CPU card while maintaining deterministic backplane bus state preservation across line voltage dips.
Frequently Asked Questions
Q: How does the unit connect to the primary controller rack?
A: The module connects via the included dedicated connection cable TK821v020, linking the DIN-rail mounted battery enclosure directly to the processor memory backup terminal.
Q: Are there transport restrictions for this lithium-based battery module?
A: Yes, because the module contains 90 g of lithium metal chemistry, shipment and handling must comply with International Air Transport Association (IATA) and Dangerous Goods Regulations (DGR) for Class 9 hazardous materials.
Q: Can the unit be replaced while the system is powered?
A: Yes, if the primary 24 V DC system power supply remains active and stable, the external battery unit can be serviced without interrupting processor execution or losing volatile SRAM memory contents.
Field Installation Guidelines
- Mount the unit securely on a standard EN DIN-rail within the enclosure, maintaining vertical clearance for cable routing.
- Inspect the TK821v020 connection cable pin orientation before mating the connector to the system interface port.
- Verify cabinet environmental temperatures stay within standard industrial control specifications to avoid reducing lithium cell operating life.
- Ensure proper terminal connection alignment to prevent short-circuit conditions during installation or maintenance procedures.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
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