ABB SB822 | Rechargeable External Battery Unit for AC 800M Controllers

Description

ABB SB822 – Rechargeable External Battery Unit for AC 800M Controllers

Product Overview

The ABB SB822 (3BSE018172R1) is a rechargeable external battery unit engineered specifically for ABB AC 800M controllers within the 800xA distributed control system-. Its primary function is to provide uninterrupted backup power to processor modules—such as PM861, PM864, or PM866—during main power failures, ensuring that SRAM contents, configuration data, program logic, and real-time variables are preserved-22.

In industrial environments where unexpected downtime can result in significant production losses or safety risks, the SB822 addresses a critical need: preventing data loss and eliminating the cold-start risks associated with power interruptions-22. Unlike built-in batteries with limited capacity, this external unit offers extended backup duration and simplifies maintenance through DIN-rail mounting that allows battery replacement without CPU disassembly-22. The module includes a lithium-ion battery, a 24 V DC connector, and a 2-meter TK821V020 connection cable for rapid deployment–11.

Technical Specifications — SB822

Key Features and Benefits — SB822

• Extended Memory Backup – Provides significantly longer backup duration compared to internal CPU batteries, typically sustaining SRAM for extended periods (days to weeks depending on RAM load)-22-. This ensures critical process data and program logic remain intact through extended power outages.
• Hot-Swap Ready DIN-Rail Mounting – The compact DIN-rail design allows installation in standard control cabinets without occupying excessive space-11. Battery replacement can be performed without removing the CPU module, minimizing system downtime-22.
• Integrated Status Monitoring – Equipped with monitoring output signals that can be integrated into the system alarm framework, providing real-time visibility into battery health and charge status-22.
• Comprehensive Protection Circuitry – Features overcharge protection, over-discharge protection, temperature protection, short-circuit protection, and reverse polarity protection-3. These safeguards ensure reliable operation even in demanding industrial conditions.
• Wide Temperature Tolerance – Rated for operation from -20°C to +60°C-, the SB822 performs reliably across the full range of industrial environments, from chilled processing plants to heat-generating control rooms.

Related Models

SB821 – Standard battery backup unit for AC 800M controllers, offering similar backup functionality with different capacity specifications-22.

PM861 / PM864 / PM866 – Processor modules compatible with the SB822 external battery unit, benefiting from extended memory retention during power interruptions-22.

TK821V020 – The 2-meter connection cable included with the SB822 for interfacing between the battery unit and the AC 800M controller–11.

DI810 / DO810 – Digital input and output modules within the AC 800M ecosystem, often deployed alongside the SB822 in complete control system configurations-22.

Installation and Maintenance — SB822

Installation of the SB822 follows a straightforward procedure-:

1. Mount the unit on a standard 35 mm DIN-rail at a suitable position within the control cabinet-.
2. Connect the battery unit using the provided TK821V020 cable—plug one end into the battery unit and the other into the AC 800M controller-.
3. At delivery, the lithium-ion battery package is not internally connected—this connection is made during installation-.

Maintenance considerations: The lithium-ion battery is replaceable, and the external mounting design allows for battery swaps without disturbing the CPU module-22. Regular status monitoring through the system alarm framework is recommended to track battery health and plan preventive replacements-22. The module carries an IP20 protection rating, making it suitable for standard control cabinet environments where protection against solid objects larger than 12.5 mm is sufficient-.