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
The Shift to Flexible IO Modules in Modern Industrial Automation
Traditional control systems rely on dedicated Input Output (IO) cards for industrial automation. Each conventional module processes a single signal type, such as Digital Input (DI), Digital Output (DO), Analog Input (AI), or Analog Output (AO). A standard 16-channel card accepts only one specific channel type across all ports. This inflexible hardware design often creates severe engineering bottlenecks during project execution. Engineers frequently must install entirely new cards to accommodate a single extra sensor. Consequently, late design changes increase control cabinet space requirements and drive up project costs.
DCS Commissioning Steps in Industrial Automation Projects
Commissioning a Distributed Control System (DCS) represents a crucial milestone when deploying modern process automation infrastructure. Field engineers must execute systematic verification steps to transition complex control hardware from static installation to dynamic plant control. Proper commissioning ensures that controllers, I/O modules, network switches, and HMI software operate in strict compliance with engineering design specifications before introducing live process fluids.
PLC and DCS Control System Spares Strategy: Engineering Guidelines
Modern factory automation relies on high-speed fiber optic backbones to link distributed control systems across noise-intensive industrial environments. Unlike copper wiring, optical fibers transmit data via light pulses, making them completely immune to electromagnetic interference (EMI). Field engineers must master optical cable joining and fusion splicing techniques to guarantee low-loss data transmission across critical Programmable Logic Controller (PLC) and Distributed Control System (DCS) nodes.