The ABB SB821 Battery Unit is an external DIN-rail mounted backup battery designed for long-duration power support, offering a minimum backup time of 1 month. Engineered to support critical CPU operations in industrial automation systems, the SB821 includes a pre-connected lithium battery and TK821V020 connection cable for easy integration.

Ideal for high-reliability environments, this compact unit (width: 85 mm) ensures continuous operation during power interruptions and meets international standards for safety and environmental compliance. Use one SB821 per CPU for optimal performance and protection of control system data and operations.

Key Features:

• DIN-rail mounted battery unit for industrial use

• Minimum 1-month backup time for long-term reliability

• Includes lithium battery and TK821V020 connection cable

• Supports each CPU independently (1 unit per CPU)

• Compact 85 mm width for space-efficient installation

• Compliant with RoHS and WEEE directives

• Lithium battery weight: 90 g

• Dangerous Goods Classification: UN3091, Class 9

Applications:

• Industrial automation systems

• Control panels and CPU backup

• Manufacturing and process control environments

• Critical infrastructure requiring reliable backup power