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.
Tech & Buying Guide
Understanding OpenTelemetry in Industrial Automation: Architecture, Observability, and Operational Benefits
Modern industrial control systems (PLCs, DCS, edge nodes) are rapidly adopting cloud-native architectures, generating vast operational data. OpenTelemetry offers an open-source framework that unifies metrics, logs, and execution traces, enabling standardized observability across industrial automation and IT systems.
Mastering Functional Safety Terminology in Industrial Automation
In modern process control and factory automation, managing operational risk is a top engineering priority. High-speed machinery, high-pressure vessels, and continuous processes present constant hazards to personnel and equipment. Modern plant operations rely heavily on functional safety strategies to mitigate these risks. This guide breaks down the essential functional safety terminology that every control systems engineer should master.
Understanding Dry Contacts in PLC Wiring: An Industrial Automation Guide
Mastering contact switching principles is essential for reliable control panels. Field devices and PLCs interface through dry or wet contacts. This technical guide examines the mechanics of dry contacts, explores their wiring architectures, and evaluates their key advantages in industrial automation.