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ABB DSSB120 Battery Unit  

1. Key Parameters

• Product Model: DSSB120
• Product Series: ABB AC500 Series Industrial Backup Battery Units (Integrated Power Solutions)
• Core Function: Provides backup DC power to AC500 PLC systems during mains outages; includes built-in smart charging circuit (CC-CV mode); monitors battery status (voltage, charge level, temperature); enables seamless switching between mains and backup power; offers overcharge/overdischarge/overtemperature protection; integrates with AC500 via dedicated interface for status feedback
• Battery & Charging Specifications:

  Parameter	Details	Performance Metrics
  Battery Characteristics	- Type: Sealed Lead-Acid (SLA)/Absorbent Glass Mat (AGM) (maintenance-free) - Nominal Voltage: 24V DC - Nominal Capacity: 7Ah (20h discharge rate, 25℃) - Cycle Life: ≥300 cycles (50% depth of discharge, 25℃) - Self-Discharge Rate: ≤3% per month (25℃)	Maintenance-free AGM design eliminates electrolyte topping; 7Ah capacity supports 72+ hours of AC500 RAM backup (typical load: 100mA); low self-discharge ensures 6+ months of standby without recharging
  Charging System	- Charging Mode: Constant Current-Constant Voltage (CC-CV) (built-in) - Input Voltage for Charging: 24V DC ±10% (from AC500 power supply, e.g., DSSA165) - Charging Current: 0.7A (max, constant current phase); 0.1A (float phase) - Charging Time: ≤8 hours (0~100% capacity, 25℃) - Float Voltage: 27.6V DC ±2% (maintains full charge during standby)	CC-CV charging optimizes battery lifespan (avoids overcharge); float mode prevents self-discharge during long mains availability; 8-hour fast recharge minimizes downtime after backup activation

• Backup Power & Protection Specifications:

  Parameter	Details	Performance Metrics
  Backup Power Output	- Output Voltage: 24V DC ±5% (under load) - Max Continuous Output Current: 1A - Peak Output Current: 3A (10s duration) - Backup Duration: 72h (100mA load); 24h (300mA load); 8h (1A load)	1A continuous output powers AC500 processor (e.g., DSPC155) + critical I/O modules; 3A peak current handles startup of small emergency devices (e.g., alarm buzzers); backup duration covers most mains outages (average industrial outage: 1~4 hours)
  Protection Features	- Overcharge Protection: 29V DC ±2% (charging cutoff, auto-recovery) - Overdischarge Protection: 21V DC ±2% (output cutoff, manual reset after recharge) - Overtemperature Protection: 75℃ ±5℃ (thermal shutdown, auto-recovery when cooled) - Short-Circuit Protection: Current limiting ≤5A (hiccup mode, auto-recovery)	Multi-layer protection prevents battery damage (e.g., overcharge-induced swelling) and PLC short circuits; short-circuit hiccup mode avoids permanent damage to internal components

• Mechanical & Environmental Specifications:

  Parameter	Details	Performance Metrics
  Mechanical Design	- Dimensions: 150mm (W) × 100mm (H) × 80mm (D) - Mounting Type: DIN rail mount (EN 50022, 35mm) or panel mount (via integrated tabs) - Housing Material: Flame-retardant ABS plastic (UL 94 V0) with impact-resistant design - Weight: Approximately 1.8kg (including battery) - Indicators: 3× LED status lights (red = charging, green = fully charged/standby, yellow = backup active/fault)	Compact DIN rail design fits in standard AC500 control cabinets (saves 40% space vs. separate battery + charger); UL 94 V0 housing reduces fire risk in dense rack configurations; LEDs enable on-site status checks without tools
  Environmental Ratings	- Operating Temperature Range: -15℃~+50℃ (-5℉~122℉) - Storage Temperature Range: -20℃~+60℃ (-4℉~140℉) - Humidity Tolerance: 5%~95% RH (non-condensing, 40℃) - Vibration Resistance: 10~500Hz, 0.5g acceleration (IEC 60068-2-6) - Shock Resistance: 15g (11ms half-sine, IEC 60068-2-27) - EMC Compliance: EN 61000-6-2 (immunity: Level 2); EN 61000-6-3 (emission: Class B)	-15℃~+50℃ range suits unconditioned industrial cabinets (e.g., workshop floors, outdoor substations); vibration resistance prevents internal battery damage from equipment operation (e.g., conveyors, pumps)

• Integration & Compliance Specifications:

  Parameter	Details	Performance Metrics
  AC500 Integration	- Interface: 2-pin power connector (backup output to AC500) + 3-pin signal connector (status feedback to AC500) - Status Signals: Charging (dry contact), Fully Charged (dry contact), Fault (dry contact) - Compatibility: All AC500 series PLCs (e.g., DSPC155, DSPC3001, DSPC172) and power supplies (e.g., DSSA165)	Dry contact signals enable AC500 to log battery status (e.g., trigger alert if "fault" signal is active); plug-and-play connectors reduce integration time to <10 minutes
  Compliance Standards: CE, UL 508, CSA C22.2 No.14, IEC 61558-2-1 (battery chargers), IEC 60950-1 (safety), RoHS 2.0, ISO 9001

2. Core Features

• All-in-One Integrated Design: Combines AGM battery, CC-CV charger, and protection circuit in a single DIN rail unit—eliminates the need for separate battery, charger, and enclosure, reducing cabinet space usage by 50% vs. discrete solutions; simplifies installation (no wiring between charger and battery).
• Maintenance-Free AGM Battery: Sealed Absorbent Glass Mat technology—no electrolyte leakage, topping, or ventilation required; suitable for indoor/outdoor cabinets and vertical/horizontal mounting; withstands mild impacts and vibration, ideal for mobile or harsh industrial environments.
• Smart CC-CV Charging: Built-in Constant Current-Constant Voltage charging—optimizes battery lifespan by avoiding overcharge (float mode maintains full capacity during standby) and undercharge (fast recharge after backup); 0.7A charging current balances speed and battery health (extends cycle life to ≥300 cycles).
• Seamless Backup Switching: Auto-detects mains power loss and switches to battery backup in <100ms—ensures uninterrupted power for AC500 RAM (preserves control logic, batch data, and I/O configurations) and critical outputs (e.g., emergency valve shutdowns, alarm systems); switches back to mains automatically when power is restored.
• Intuitive Status Monitoring: 3-color LEDs + AC500 dry contact feedback—on-site technicians can quickly check status (red = charging, green = standby, yellow = backup/fault); AC500 logs status changes (e.g., backup activation time) for compliance audits (e.g., ISO 9001, FDA 21 CFR Part 11) in regulated industries.
• Industrial-Grade Durability: Flame-retardant UL 94 V0 housing + -15℃~+50℃ operating range—withstands harsh industrial conditions (dust, moisture, temperature fluctuations) that damage consumer-grade batteries; 15g shock resistance survives accidental impacts during cabinet maintenance, extending service life to 5+ years.
• Plug-and-Play AC500 Compatibility: Dedicated connectors for AC500 power and status feedback—no custom wiring or programming required; works with all AC500 processors and ABB power supplies (e.g., DSSA165); reduces integration time by 70% vs. third-party backup solutions.

3. Application Fields

• Industrial PLC Backup Power:
  • AC500 RAM Data Retention: Provides 72+ hours of backup power for AC500 processors (e.g., DSPC155, DSPC3001)—preserves control logic, production recipes, and batch logs during mains outages; prevents costly reconfiguration and data loss (e.g., $10k~$50k in downtime for recipe recovery).
  • Critical I/O Output Backup: Powers emergency I/O devices (e.g., solenoid valves, alarm buzzers) for 8~24 hours—ensures safe shutdown of processes (e.g., chemical mixing tanks, conveyor lines) during extended outages; avoids equipment damage from unplanned stops.
• Process Control: Hazardous Area Backup:
  • Chemical Plants: Supplies backup power to AC500 PLCs in reactor control cabinets—maintenance-free AGM design avoids electrolyte leakage (critical for corrosive environments); overtemperature protection (75℃ cutoff) prevents battery failure near heat-generating equipment (e.g., heaters, pumps).
  • Oil Refineries: Backs up AC500 systems in pipeline monitoring racks—vibration resistance (0.5g) withstands pump-induced shocks; EMC immunity avoids interference from high-voltage switchgear; compact design fits in space-constrained substation cabinets.
• Energy & Utilities: Substation Automation:
  • Power Substations: Supports AC500 PLCs for auxiliary switchgear control—-15℃~+50℃ range suits outdoor substation cabinets (winter cold, summer heat); low self-discharge (≤3%/month) ensures readiness during long mains availability (e.g., 6 months without charging).
  • Solar PV Plants: Backs up AC500 systems for inverter control—provides power for inverter shutdown sequences during grid outages; prevents inverter damage from abrupt power loss; works with ABB DSSA165 power supplies for seamless charging.
• Building Automation: Critical System Backup:
  • Manufacturing Workshops: Powers AC500 PLCs for small-scale production lines—DIN rail mounting fits in compact control cabinets; LED status indicators simplify maintenance (no need to open cabinets for battery checks); overcharge protection avoids damage from 24V power supply fluctuations.
  • Cold Storage Warehouses: Backs up AC500 systems for temperature monitoring—-15℃ operating range withstands cold storage environments; sealed design prevents moisture ingress (common in refrigerated spaces); ensures temperature data logging continues during outages.

The structure and details of the product：

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