ABB SB821 (Order Code: 3BSE018109R1) Battery Unit  

1. Key Parameters

• Product Model: SB821
• Order Code/Part Number: 3BSE018109R1 (unique identifier for procurement and system compatibility verification)
• Core Function: Backup power supply for AC 800M DCS components; retains program memory, configuration data, and real-time variables during main power failure
• Battery Specifications:
  • Battery Type: Rechargeable lithium-ion (Li-ion) battery pack (high energy density, low self-discharge)
  • Nominal Voltage: 3.6V DC
  • Capacity: 2200 mAh (typical); 2000 mAh (minimum)
  • Charging Voltage: 4.2V DC (regulated via AC 800M rack power supply)
  • Charging Time: 4~6 hours (from fully discharged to 90% capacity)
  • Cycle Life: ≥500 charge-discharge cycles (at 25℃ ambient temperature)
  • Self-Discharge Rate: ≤3% per month (at 25℃; ensures long standby time)
• Mechanical Specifications:
  • Dimensions (W×H×D): 25mm × 50mm × 100mm (1-module width, fits AC 800M standard I/O racks)
  • Mounting: Rack-mounted (dedicated slot in AC 800M racks; tool-less installation via snap-in clips)
  • Weight: Approximately 120g
  • LED Indicators: Charging status (RED: charging; GREEN: fully charged; AMBER: low battery/ fault)
• Environmental Ratings:
  • Operating Temperature Range: 0℃~+40℃ (32℉~104℉) (optimal for battery performance and lifespan)
  • Storage Temperature Range: -20℃~+50℃ (-4℉~122℉) (store at 20%~50% charge to prevent cell damage)
  • Humidity Tolerance: ≤75% RH (non-condensing; high humidity accelerates corrosion)
  • Vibration Resistance: 10~500Hz, 1g acceleration (IEC 60068-2-6; avoids battery cell damage)
• Safety & Compliance:
  • Protection Features: Overcharge protection (OCP), over-discharge protection (ODP), short-circuit protection (SCP), temperature protection (TSP)
  • Compliance Standards: IEC 62133 (Li-ion battery safety), UL 1642 (lithium battery safety), RoHS (restriction of hazardous substances)

2. Key Features

• Reliable Backup Power: 2200 mAh Li-ion battery provides up to 72 hours of backup power for AC 800M processor memory (at 25℃), ensuring no data loss during extended main power outages—critical for processes where data corruption leads to costly restarts.
• Integrated Safety Protections: Built-in OCP, ODP, SCP, and TSP prevent battery damage from overcharging, deep discharge, short circuits, or extreme temperatures—reducing fire risk and extending battery lifespan.
• Seamless AC 800M Integration: Designed for tool-less installation in dedicated AC 800M rack slots, with automatic charging via the rack’s power supply. No external wiring or configuration is required, simplifying deployment.
• Intuitive Status Monitoring: LED indicators clearly show charging progress (RED), full charge (GREEN), and low battery/fault (AMBER)—enabling maintenance teams to proactively replace aging batteries before failure.
• Long Service Life: ≥500 charge-discharge cycles and ≤3% monthly self-discharge rate minimize replacement frequency, reducing maintenance costs for industrial facilities operating 24/7.
• RoHS Compliance: Free of hazardous substances (lead, mercury, cadmium) to meet global environmental regulations, making it suitable for use in eco-sensitive industries (e.g., pharmaceuticals, food processing).
• Compact Design: 25mm width fits seamlessly in AC 800M racks without 占用 additional space, preserving room for I/O modules and other critical components.

3. Application Fields

• AC 800M DCS Systems: Provides backup power for PM-series processors (e.g., PM866K02, PM861AK02) in chemical, petrochemical, and power plants—retaining control programs and process data during power outages.
• Industrial Automation Control Rooms: Supports AC 800M-based control panels in manufacturing facilities (automotive, electronics) to prevent data loss in production line control logic, avoiding costly downtime.
• Power Generation Facilities: Backs up AC 800M controllers in thermal, nuclear, and renewable energy plants—ensuring grid stability data and turbine control parameters are preserved during utility power fluctuations.
• Water & Wastewater Treatment Plants: Protects AC 800M-based pump and valve control systems—retaining dosing schedules and flow rate data to avoid non-compliance with environmental regulations during outages.
• Mining & Metals Operations: Supports AC 800M controllers in underground mines and smelters—withstanding vibration and temperature variations while preserving crusher control and conveyor scheduling data.
• Marine & Offshore Platforms: Powers AC 800M systems on offshore oil rigs and ships—resisting salt spray and humidity to retain critical navigation and process control data during marine power disruptions.

4. Precautions

• System Compatibility: Use exclusively with ABB AC 800M racks and compatible processors (e.g., PM860AK01, PM864AK02). Non-AC 800M systems may apply incorrect charging voltages, damaging the battery or causing safety hazards.
• Charging Environment: Install only in environments within 0℃~+40℃. Charging outside this range reduces battery capacity, shortens lifespan, or triggers temperature protection (halting charging).
• Battery Replacement Protocol: Replace the battery only when the AMBER LED is active (low battery) or after reaching the 500-cycle lifespan. Disconnect the AC 800M rack’s main power before replacement to avoid electrical shock.
• Storage Guidelines: Store unused batteries at 20%~50% charge (never fully charged or discharged) in a dry, cool environment (-20℃~+50℃). Prolonged storage at extreme charge levels or temperatures causes permanent cell damage.
• Safety Handling: Do not disassemble, puncture, or expose the battery to fire. Damaged Li-ion batteries may leak or ignite—dispose of old batteries via authorized recycling programs (compliant with local waste regulations).
• Avoid Over-Discharge: Do not let the battery discharge below 2.5V DC. Deep discharge damages lithium-ion cells, reducing capacity and increasing the risk of irreversible failure.
• Regular Inspection: Check LED status monthly to monitor battery health. Test backup functionality annually by simulating a main power outage (ensure critical data is retained) to confirm the battery is operational