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ABB DSSR122M Power Supply Unit 

1. Key Parameters

• Product Model: DSSR122M
• Product Series: ABB AC500 Series Industrial Compact Power Supply Units (Low-Power DC Distribution)
• Core Function: Converts 100V~240V AC mains to regulated 24V DC (or 12V DC optional) for AC500 PLCs and small automation components; provides overload, overvoltage, and short-circuit protection; supports DIN rail mounting for space-constrained cabinets; delivers low ripple output for sensitive sensors; ensures energy efficiency for 24/7 operation
• Electrical Specifications:

  Parameter	Details	Performance Metrics
  Input Characteristics	- Input Voltage Range: 100V~240V AC (50Hz/60Hz, auto-adaptive) - Input Current: Max 1.2A (100V AC); Max 0.6A (240V AC) - Input Protection: Surge protection (IEC 61000-4-5, 1.5kV); Brownout tolerance (80V AC~100V AC, 3s hold-up) - Power Factor Correction (PFC): Passive PFC (PF ≥0.85 at full load)	Auto-adaptive input works with global AC mains (no voltage selector); 1.5kV surge protection withstands minor grid transients (e.g., appliance startup spikes); passive PFC complies with basic industrial power quality standards (EN 61000-3-2, Class B)
  Output Characteristics	- Output Voltage: 24V DC ±2% (regulated; optional 12V DC ±2% variant) - Output Current: Max 5A (24V DC model); Max 10A (12V DC model) - Output Power: 120W (24V DC × 5A); 120W (12V DC × 10A) - Voltage Regulation: ±0.8% (line regulation); ±1.2% (load regulation) - Ripple & Noise: ≤80mVpp (20MHz bandwidth)	120W output powers small AC500 systems (e.g., 1× DSPC150 processor + 4× DSMB I/O modules); ≤80mVpp ripple ensures stable operation of low-power sensors (e.g., photoelectric switches, temperature transducers); 5A/10A current suits light-to-medium load clusters

• Mechanical & Environmental Specifications:

  Parameter	Details	Performance Metrics
  Mechanical Design	- Dimensions: 75mm (W) × 100mm (H) × 125mm (D) - Mounting Type: DIN rail mount (EN 50022, 35mm) - Housing Material: Flame-retardant thermoplastic (UL 94 V0) - Weight: Approximately 450g - Indicators: 1× AC input LED (green = input active); 1× DC output LED (green = output normal, red = fault)	Ultra-compact DIN rail design saves 50% cabinet space vs. standard 120W power supplies; fits in narrow panels (e.g., building automation enclosures, small manufacturing cell cabinets); LED indicators enable quick on-site status checks
  Environmental Ratings	- Operating Temperature Range: -20℃~+60℃ (-4℉~140℉) - Storage Temperature Range: -40℃~+85℃ (-40℉~185℉) - Humidity Tolerance: 5%~95% RH (non-condensing, 40℃) - Vibration Resistance: 10~500Hz, 0.8g 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)	-20℃~+60℃ range suits unconditioned industrial spaces (e.g., workshop tool cabinets, outdoor utility boxes); Level 2 EMC immunity resists interference from small motors and household appliances; vibration resistance prevents loose connections in mobile equipment (e.g., portable control panels)

• Protection & Compliance Specifications:

  Parameter	Details	Performance Metrics
  Protection Features	- Overload Protection: 110%~150% load (hiccup mode, auto-recovery) - Overvoltage Protection: 30V DC ±5% (24V model); 15V DC ±5% (12V model) (latching, manual reset) - Short-Circuit Protection: Current limiting (≤7A for 24V; ≤12A for 12V) (hiccup mode, auto-recovery) - Over-Temperature Protection: 75℃ ±5℃ (thermal shutdown, auto-recovery when cooled)	Hiccup-mode protection prevents damage during temporary overloads (e.g., sensor startup current); latching overvoltage protection avoids irreversible harm to sensitive AC500 modules (e.g., DSPC150 processor); thermal shutdown protects against cabinet heat buildup
  Compliance Standards: CE, UL 508, CSA C22.2 No.14, IEC 61558-2-1 (power supplies), IEC 61000-6-2 (EMC), RoHS 2.0, ISO 9001

2. Core Features

• Compact High-Density Design: 120W output in a 75mm-wide DIN rail form—delivers 2.1W/cm³ power density, 40% higher than bulkier 120W power supplies; fits in space-constrained cabinets (e.g., 19-inch 1U panels, narrow building automation enclosures), eliminating the need for larger enclosures and reducing installation costs.
• Global AC Input & Basic Surge Protection: 100V~240V AC auto-adaptive input + 1.5kV surge protection—works with global mains voltages (no manual switching), simplifying international deployments (e.g., 100V in Japan, 230V in Europe); surge protection withstands minor grid transients (common in commercial buildings and small factories).
• Dual-Voltage Flexibility (24V/12V): Available in 24V DC (5A) or 12V DC (10A) variants—adapts to diverse load needs (24V for AC500 PLCs, 12V for legacy sensors); avoids the need for separate power supplies for mixed-voltage systems, reducing inventory complexity and cabinet clutter.
• Stable Low-Ripple Output: ≤80mVpp ripple + tight voltage regulation—ensures reliable operation of sensitive low-power components (e.g., 24V photoelectric sensors, 12V temperature transducers); eliminates false triggers from voltage fluctuations, critical for precision tasks (e.g., small-part assembly line detection).
• Cost-Effective Energy Efficiency: 88% peak efficiency (at 50%~75% load)—reduces energy consumption for 24/7 operation (e.g., $20~$40/year in energy savings per unit vs. low-efficiency alternatives); passive cooling (no fans) further lowers operating costs by eliminating maintenance needs.
• Simplified Installation & Troubleshooting: DIN rail mounting + 2-color LED indicators—installs in <2 minutes (no custom brackets); green/red LEDs quickly signal normal operation or faults (e.g., red = overvoltage/overtemperature); standard terminal blocks accept 18AWG~14AWG wires, simplifying wiring for small teams.
• Industrial-Grade Durability: UL 94 V0 flame-retardant housing + -20℃~+60℃ operating range—withstands harsh conditions (dust, moisture, temperature fluctuations) that damage consumer-grade power supplies; 15g shock resistance survives accidental impacts during cabinet maintenance, extending service life to 5+ years.

3. Application Fields

• Small-Scale Manufacturing: Compact PLC Power:
  • Electronics Assembly Cells: Powers AC500 micro PLCs (e.g., DSPC150) for small SMT workstations—24V 5A output supplies 1× PLC + 4× DSMB digital I/O modules + 8× photoelectric sensors; compact design fits in 19-inch 1U control cabinets; low ripple ensures accurate component detection (e.g., 0402 SMD parts).
  • Woodworking Shops: Supplies 24V DC to AC500 PLCs for CNC router auxiliary control—powers limit switches (workpiece positioning) and coolant valves; 1.5kV surge protection withstands voltage spikes from CNC motor startup; flame-retardant housing reduces fire risk near wood dust.
• Building Automation: Space-Constrained Panels:
  • Commercial Offices: Powers AC500 PLCs for HVAC zone control—24V 5A output supplies 1× PLC + 6× temperature/humidity sensors + 4× damper actuators; compact design fits in narrow wall-mounted enclosures; 88% efficiency reduces building energy costs.
  • Retail Stores: Provides 12V DC to legacy security sensors (motion detectors, door contacts) and 24V DC to AC500 PLCs for alarm control—dual-voltage variant eliminates separate power supplies; EMC compliance avoids interference with POS systems; DIN rail mounting simplifies panel upgrades.
• Utility & Infrastructure: Auxiliary Control:
  • Small Power Substations: Powers AC500 PLCs for auxiliary equipment (battery chargers, cooling fans)—24V 5A output supports 1× PLC + 3× DSMB I/O modules; -20℃~+60℃ range suits outdoor substation cabinets; overvoltage protection avoids damage from grid transients.
  • Street Light Control: Supplies 24V DC to AC500 PLCs for smart street light management—powers photo sensors (dusk/dawn detection) and relay outputs (light switching); compact design fits in pole-mounted enclosures; low power consumption (idle <1W) reduces operational costs for municipal projects.
• Renewable Energy: Micro-Inverter Power:
  • Residential Solar Systems (5~10kW): Powers AC500 PLCs for micro-inverter monitoring—24V 5A output supplies 1× PLC + 6× current sensors (panel output tracking); passive cooling avoids fan clogging from outdoor dust; wide input range (100V~240V) handles variable grid voltage.
  • Small Wind Turbines (1~5kW): Provides 24V DC to AC500 PLCs for turbine yaw control—powers wind direction sensors and brake actuators; vibration resistance (0.8g) withstands turbine operation; over-temperature protection avoids damage in hot nacelle enclosures.
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The structure and details of the product：

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