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ABB DSSR120 Power Supply Unit 

1. Key Parameters

• Product Model: DSSR120
• Product Series: ABB AC500 Series Industrial Mid-Power DC Power Supply Units (100W Distribution)
• Core Function: Converts 100V~240V AC mains to regulated 24V DC (or 12V DC optional) for AC500 PLCs and medium-scale automation components; provides comprehensive protection (overload/overvoltage/short-circuit/over-temperature); supports DIN rail mounting for industrial cabinets; delivers low-ripple output for sensitive sensors; ensures high 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 1.0A (100V AC); Max 0.5A (240V AC) - Input Protection: Surge protection (IEC 61000-4-5, 2kV); Brownout tolerance (80V AC~100V AC, 4s hold-up) - Power Factor Correction (PFC): Active PFC (PF ≥0.92 at full load)	Auto-adaptive input works with global mains (no manual switching), ideal for multi-region deployments; 2kV surge protection withstands industrial-grade transients (e.g., VFD startup, lightning-induced spikes); active PFC reduces harmonic distortion, complying with EN 61000-3-2 (Class A) for industrial sites
  Output Characteristics	- Output Voltage: 24V DC ±2% (regulated; optional 12V DC ±2% variant) - Output Current: Max 4.2A (24V DC model); Max 8.4A (12V DC model) - Output Power: 100W (24V DC × 4.2A; 12V DC × 8.4A) - Voltage Regulation: ±0.6% (line regulation); ±1.0% (load regulation) - Ripple & Noise: ≤60mVpp (20MHz bandwidth)	100W output powers medium AC500 setups (1× DSPC155 processor + 6× DSMB I/O modules + 8× sensors); ≤60mVpp ripple ensures stable operation of analog sensors (e.g., pressure transmitters, temperature transducers); tight regulation avoids PLC logic errors from voltage fluctuations

• Mechanical & Environmental Specifications:

  Parameter	Details	Performance Metrics
  Mechanical Design	- Dimensions: 85mm (W) × 100mm (H) × 130mm (D) - Mounting Type: DIN rail mount (EN 50022, 35mm, tool-less snap-on) - Housing Material: Flame-retardant thermoplastic (UL 94 V0) with reinforced structure - Weight: Approximately 500g - Indicators: 1× AC input LED (green = active); 1× DC output LED (green = normal, red = fault); 1× overload LED (yellow = overload active)	Compact 85mm width fits standard industrial cabinets without wasting space; reinforced housing resists accidental impacts during maintenance; 3-color LEDs enable precise status diagnosis (e.g., yellow = overload, red = critical fault)
  Environmental Ratings	- Operating Temperature Range: -25℃~+65℃ (-13℉~149℉) - Storage Temperature Range: -40℃~+85℃ (-40℉~185℉) - Humidity Tolerance: 5%~95% RH (non-condensing, 45℃) - Vibration Resistance: 10~500Hz, 1g acceleration (IEC 60068-2-6) - Shock Resistance: 20g (11ms half-sine, IEC 60068-2-27) - EMC Compliance: EN 61000-6-2 (immunity: Level 3); EN 61000-6-3 (emission: Class B)	-25℃~+65℃ range suits unconditioned industrial spaces (e.g., factory floors, outdoor utility cabinets); Level 3 EMC immunity resists interference from VFDs and industrial motors; 1g vibration resistance prevents loose connections in high-motion environments (e.g., near conveyors)

• Protection & Compliance Specifications:

  Parameter	Details	Performance Metrics
  Protection Features	- Overload Protection: 110%~150% load (hiccup mode, auto-recovery) - Overvoltage Protection: 29V DC ±5% (24V model); 15V DC ±5% (12V model) (latching, manual reset) - Short-Circuit Protection: Current limiting (≤5A for 24V; ≤10A for 12V) (hiccup mode, auto-recovery) - Over-Temperature Protection: 80℃ ±5℃ (thermal shutdown, auto-recovery when cooled to 65℃)	Hiccup-mode overload/short-circuit protection prevents damage during temporary faults (e.g., actuator inrush current); latching overvoltage protection avoids irreversible harm to sensitive AC500 modules (e.g., DSPC155 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

• Balanced Mid-Power Capacity (100W): Delivers 100W output to power medium-scale AC500 systems (1× processor + 6× I/O modules + 8× sensors/actuators)—bridges the gap between entry-level (60W) and high-power (200W) supplies, avoiding overcapacity waste or insufficient power for growing automation needs.
• Global Compatibility & Active PFC: 100V~240V AC auto-adaptive input + active PFC (PF ≥0.92)—works with global mains voltages and reduces harmonic distortion, complying with strict industrial power quality standards (e.g., EN 61000-3-2 Class A); ideal for factory floors with shared power grids.
• Low-Ripple Output for Sensitive Loads: ≤60mVpp ripple + tight voltage regulation (±0.6% line, ±1.0% load)—ensures stable operation of analog sensors (e.g., 4-20mA pressure transmitters) and AC500 signal processing modules (e.g., DSPB112); eliminates false triggers or data drift in precision applications (e.g., semi-automatic assembly lines).
• Comprehensive Industrial Protection: Overload/overvoltage/short-circuit/over-temperature protection—covers all common industrial faults (e.g., shorted actuator wiring, grid voltage spikes); latching overvoltage protection requires manual reset for critical faults, preventing repeated damage to expensive PLC hardware.
• High Efficiency & Passive Cooling: 90% peak efficiency (at 50%~75% load)—reduces energy consumption for 24/7 operation (e.g., $30~$60/year in energy savings vs. 85% efficiency supplies); passive cooling (no fans) eliminates maintenance needs (no cleaning/replacement) and reduces failure points (fans account for 30% of power supply failures).
• Tool-Less Installation & Diagnostics: Snap-on DIN rail mounting + 3-color LEDs—installs in <2 minutes without tools; LEDs provide clear status feedback (green = normal, yellow = overload, red = fault), enabling on-site technicians to quickly identify issues (e.g., overload from additional sensors) without complex testing.
• Seamless AC500 Integration: Regulated 24V/12V output optimized for AC500 PLCs and I/O modules—no voltage adjustment needed; standard terminal blocks accept 18AWG~14AWG wires, matching the gauge of medium-load sensor/actuator connections; compatible with all AC500 mid-density modules (e.g., DSMB340 8-channel analog I/O).

3. Application Fields

• Manufacturing Automation: Medium-Load Lines:
  • Automotive Component Assembly: Powers AC500 PLCs (e.g., DSPC155) for gearbox assembly lines—24V 4.2A output supplies 1× PLC + 4× DSMB178 digital I/O modules (part alignment sensors) + 2× DSMB340 analog I/O modules (torque sensor feedback); low ripple ensures precise torque control (±0.5% accuracy), avoiding defective components.
  • Electronics PCB Assembly: Supplies power to AC500 systems for semi-automatic pick-and-place machines—24V output controls 6× solenoid valves (component grippers) + 4× photoelectric sensors (PCB presence); active PFC reduces harmonic interference with SMT equipment (e.g., reflow ovens), preventing soldering defects.
• Process Control: Auxiliary Systems:
  • Chemical Plant Auxiliary Pumps: Powers AC500 PLCs for reagent dosing pump control—24V output supplies 1× PLC + 3× DSMB340 analog I/O modules (flow/pressure sensors) + 2× relay outputs (pump starters); -25℃~+65℃ range suits unconditioned pump station cabinets; over-temperature protection avoids shutdowns from heat-generating pumps.
  • Water Treatment Filtration Units: Provides power to AC500 PLCs for multi-stage filtration control—24V output monitors 6× pressure sensors (filter clogging) and controls 4× solenoid valves (backwash cycles); low ripple ensures accurate pressure readings (±1% error), preventing premature filter replacement.
• Utility & Infrastructure: Secondary Controls:
  • Power Substation Secondary Systems: Powers AC500 PLCs for transformer cooling fan control—24V output supplies 1× PLC + 3× DSMB178 digital I/O modules (fan status sensors) + 2× DSMB340 analog I/O modules (oil temperature sensors); 2kV surge protection withstands grid transients from high-voltage switchgear.
  • Wind Farm Auxiliary Controls: Supplies power to AC500 PLCs for turbine yaw auxiliary systems—24V output powers 4× limit switches (yaw position) + 2× temperature sensors (gearbox oil) + 1× communication module; -25℃ operating range suits cold wind farm locations; vibration resistance (1g) withstands turbine nacelle motion.
• Renewable Energy: Inverter Auxiliaries:
  • Solar PV String Inverters (50kW~100kW): Powers AC500 micro PLCs for inverter monitoring—24V output supplies 1× PLC + 4× current sensors (string current) + 2× voltage sensors (DC bus voltage); active PFC complies with grid power quality standards; passive cooling avoids fan clogging from desert dust.
  • Small Hydroelectric Generators: Provides power to AC500 PLCs for turbine governor auxiliary control—24V output monitors 3× speed sensors and controls 2× hydraulic valve actuators; 20g shock resistance survives transient vibrations from water flow changes, ensuring continuous power generation.

The structure and details of the product：

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