SB822 3BSE018172R1 ABB AC800M Backup Rechargeable Battery Module

Overview

The ABB SB822 (Part Number: 3BSE018172R1) is an external DIN-rail mounted rechargeable lithium-ion battery unit engineered specifically for ABB AC 800M controller systems. Designed to ensure uncorrupted SRAM data retention during main power disruptions, the SB822 module comes complete with a dedicated 24V DC terminal connector and a pre-terminated TK821V020 connection cable. Delivering a nominal 3.6 V DC output within an IP20-rated enclosure, this compact backup power unit protects critical application code, system configuration files, and real-time execution parameters against unexpected grid dropouts.

Core Engineering Benefits

• Direct Controller Integration: Dedicated interface via TK821V020 cable allows seamless power bridging to AC 800M PM8xx Processor Modules.
• Industrial-Grade Thermal Limits: Maintains reliable charging and continuous discharge characteristics up to a maximum ambient temperature of 60 °C.
• Corrosive Environment Resistance: Rated for ISA-S71.04 Class G2 harsh operating atmospheres, preventing premature trace oxidation in chemical process plants.
• Hazardous Shipping Compliance: Features a low equivalent Lithium metal content of 0.8 g (0.03 oz), simplifying air transport regulations under IATA/ICAO guidelines.
• Rapid Cabinet Installation: Standardized 85.8 mm wide enclosure snaps directly onto standard 35 mm DIN-rails without auxiliary mounting hardware.

Technical Specifications

Target Hardware & Operational Scenarios

• Target Hardware Architecture: Integrates with ABB AC 800M Central Processing Units (including PM860, PM861, PM864, PM865, and PM866 modules).
• Continuous Process Plants: Maintains real-time clock (RTC) and battery-backed RAM during planned sub-station power maintenance or unexpected line blackouts.
• Remote DCS Cabinets: Prevents system cold-starts and configuration loss in unstaffed offshore or pipeline pumping stations.
• Emergency Shutdown Systems (ESD): Preserves sequence-of-events (SOE) logs stored in volatile memory following emergency trip events.

Diagnostic Capabilities & System Telemetry

• CPU Battery Status Monitoring: The SB822 interface continuously feeds status telemetry back to the AC 800M CPU diagnostic registers.
• System Warning Alarm Triggering: Automatically trips the "Battery Low" system alarm on Control Builder M software when internal cell terminal voltage drops below critical thresholds.
• Early Replacement Alerting: Enables proactive maintenance scheduling before complete depletion, eliminating the risk of unannounced SRAM wiping.

Order Fulfillment, Packaging & Warranty Terms

• Included Package Elements: 1x ABB SB822 Battery Unit (3BSE018172R1), 1x TK821V020 Cable, 1x 24V Connector plug.
• Warranty Assurance: Fully covered by a comprehensive 12-month replacement warranty from date of dispatch.
• Order Dispatch Window: Fast order processing with worldwide shipment ready within 24 to 48 hours.
• Global Express Courier Options: Expedited international transit via DHL Express, FedEx Priority, or UPS Worldwide.

Global PLC Spare HUB's Insight

From an automation site perspective, the SB822 is often overlooked until a facility-wide power cycle results in a blank CPU memory state. During a recent brownfield audit at a petrochemical processing plant, our engineers identified multiple AC 800M cabinets operating with depleted internal backup cells. When utility power dropped during a storm event, two units failed to retain their runtime execution logic, forcing a 14-hour line halt to restore control strategies from offline engineering backups.

Upgrading the control racks with external SB822 3BSE018172R1 rechargeable units completely eliminated this vulnerability. Because the SB822 draws trickle charge directly from the 24V DC bus during normal operation, the lithium-ion cell remains at peak charge capacity constantly. Routing the TK821V020 connection cable properly away from heavy AC motor drive wiring prevents high-frequency noise interference from entering the CPU auxiliary port, guaranteeing reliable execution when utility mains drop out.

Frequently Asked Questions & Procurement Guide

How does the rechargeable SB822 unit differ from standard internal non-rechargeable backup batteries?

Standard internal CPU batteries use primary non-rechargeable lithium coin cells with fixed lifespans (typically 2-3 years). The SB822 utilizes rechargeable technology fed by the control cabinet's 24V DC auxiliary bus, extending overall operational longevity and eliminating frequent shutdown cycles for battery replacement.

What installation distance limits apply to the TK821V020 connection cable?

Always install the unit on the DIN-rail adjacent to the target controller. Do not extend or modify the factory-supplied TK821V020 cable length, as altered impedance can impair charging performance or signal accuracy between the module and CPU.

What immediate diagnostic steps should be taken if the AC 800M CPU reports a "Battery Fault" after mounting a new unit?

First, verify that the 24V DC supply connector is firmly seated and receiving nominal voltage. Second, check the TK821V020 cable terminal keying for complete engagement. If the unit has been in long-term cold storage, allow up to 4 hours of connected mains operation for the internal trickle-charge circuit to bring the cell up to nominal floating voltage.

Are there specific environmental precautions required for ISA-S71.04 Class G2 plant locations?

Yes. Although rated for G2 corrosive environments (mild hydrogen sulfide/sulfur dioxide presence), ensure your cabinet ventilation filters maintain IP20 isolation. Excessive ambient moisture combined with chemical vapors can accelerate pin corrosion on the open connector ends over long service spans.

What is the recommended replacement threshold for pre-existing field modules?

Even though rechargeable cells significantly outlast primary batteries, chemical degradation occurs over time at elevated operating temperatures. If your control cabinet consistently operates near the 60 °C upper thermal limit, we advise replacing backup units every 5 years to guarantee full rated SRAM retention time during prolonged outages.

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