{"product_id":"sb821-battery-unit-3bse018109r1-system-backup-module-abb","title":"SB821 Battery Unit 3BSE018109R1 System Backup Module | ABB","description":"\u003cp\u003eConfigured for power failure memory retention in ABB System 800xA control systems, the \u003cstrong\u003eABB SB821 Battery Unit 3BSE018109R1\u003c\/strong\u003e (\u003cstrong\u003eSB821\u003c\/strong\u003e 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.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eSB821 (3BSE018109R1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eABB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eSweden\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e85 mm x 136 mm x 59 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eStandard Control Panel Environmental Range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eSelf-powered backup (3 V DC nominal cell circuit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery Type\u003c\/td\u003e\n\u003ctd\u003eLithium (90 g chemistry mass)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Backup Time\u003c\/td\u003e\n\u003ctd\u003e1 month\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003eExternal DIN-rail mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Accessories\u003c\/td\u003e\n\u003ctd\u003eConnection Cable TK821v020\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFirmware Flash Compatibility and Memory Retention Architecture\u003c\/h3\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the unit connect to the primary controller rack?\u003c\/p\u003e\n\u003cp\u003eA: The module connects via the included dedicated connection cable TK821v020, linking the DIN-rail mounted battery enclosure directly to the processor memory backup terminal.\u003c\/p\u003e\n\u003cp\u003eQ: Are there transport restrictions for this lithium-based battery module?\u003c\/p\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\u003cp\u003eQ: Can the unit be replaced while the system is powered?\u003c\/p\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the unit securely on a standard EN DIN-rail within the enclosure, maintaining vertical clearance for cable routing.\u003c\/li\u003e\n\u003cli\u003eInspect the TK821v020 connection cable pin orientation before mating the connector to the system interface port.\u003c\/li\u003e\n\u003cli\u003eVerify cabinet environmental temperatures stay within standard industrial control specifications to avoid reducing lithium cell operating life.\u003c\/li\u003e\n\u003cli\u003eEnsure proper terminal connection alignment to prevent short-circuit conditions during installation or maintenance procedures.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":53252971168053,"sku":"SB821 3BSE018109R1","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/SB8213BSE018109R1.png?v=1785995488","url":"https:\/\/www.5gplc.com\/products\/sb821-battery-unit-3bse018109r1-system-backup-module-abb","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}