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ABB DSSA165 Power Supply Unit  

1. Key Parameters

• Product Model: DSSA165
• Product Series: ABB AC500 Series Industrial Power Supply Units (High-Density DC Power Distribution)
• Core Function: Converts AC mains voltage (100V~240V AC) to regulated 24V DC (or optional 48V DC) for AC500 PLC systems; provides overload, overvoltage, and short-circuit protection; supports parallel operation for redundancy/scalability; enables remote monitoring of power status; delivers high-efficiency power conversion to reduce energy consumption
• Electrical Specifications:

  Parameter	Details	Performance Metrics
  Input Characteristics	- Input Voltage Range: 100V~240V AC (50Hz/60Hz, auto-adaptive) - Input Current: Max 3.5A (100V AC); Max 1.8A (240V AC) - Input Protection: Surge protection (IEC 61000-4-5, 2kV); Brownout tolerance (80V AC~100V AC, 5s hold-up) - Power Factor Correction (PFC): Active PFC (PF ≥0.95 at full load)	Auto-adaptive input works with global AC mains (no voltage selector switch); 2kV surge protection withstands lightning-induced spikes; active PFC reduces harmonic distortion, complying with EN 61000-3-2 (Class A)
  Output Characteristics	- Output Voltage: 24V DC ±2% (regulated; optional 48V DC ±2% variant available) - Output Current: Max 16.5A (24V DC model); Max 8.2A (48V DC model) - Output Power: 400W (24V DC × 16.5A); 400W (48V DC × 8.2A) - Voltage Regulation: ±0.5% (line regulation); ±1% (load regulation) - Ripple & Noise: ≤50mVpp (20MHz bandwidth)	400W high power density powers full AC500 systems (e.g., 1× DSPC172 processor + 8× DSMB I/O modules + 2× DSRF182 I/O frames); ≤50mVpp ripple ensures stable operation of sensitive components (e.g., analog sensors, signal processing boards)

• Mechanical & Environmental Specifications:

  Parameter	Details	Performance Metrics
  Mechanical Design	- Dimensions: 125mm (W) × 100mm (H) × 175mm (D) - Mounting Type: DIN rail mount (EN 50022, 35mm) or panel mount (via optional brackets) - Housing Material: Aluminum alloy (heat dissipation) + flame-retardant plastic (UL 94 V0) - Weight: Approximately 1.2kg - Indicators: 1× AC input LED (green = input active); 1× DC output LED (green = output normal, red = fault); 1× overload LED (yellow = overload active)	DIN rail mounting simplifies installation in standard control cabinets; aluminum housing enhances heat dissipation (no internal fans); compact design saves cabinet space vs. low-density power supplies
  Environmental Ratings	- Operating Temperature Range: -25℃~+70℃ (-13℉~158℉) - Storage Temperature Range: -40℃~+85℃ (-40℉~185℉) - Humidity Tolerance: 5%~95% RH (non-condensing, 40℃) - Vibration Resistance: 10~500Hz, 1g acceleration (IEC 60068-2-6) - Shock Resistance: 30g (11ms half-sine, IEC 60068-2-27) - EMC Compliance: EN 61000-6-2 (immunity: Level 3); EN 61000-6-3 (emission: Class B)	-25℃~+70℃ range suits unconditioned industrial spaces (e.g., factory floors, outdoor substations); Level 3 EMC immunity resists interference from VFDs and high-power motors; vibration resistance prevents loose connections in mobile equipment (e.g., mining control cabinets)

• 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); 60V DC ±5% (48V model) (latching, manual reset) - Short-Circuit Protection: Current limiting (≤20A for 24V model; ≤10A for 48V model) (hiccup mode, auto-recovery) - Over-Temperature Protection: 85℃ ±5℃ (thermal shutdown, auto-recovery when cooled)	Hiccup-mode overload/short-circuit protection prevents damage to the power supply and connected loads; latching overvoltage protection avoids irreversible harm to sensitive PLC modules (e.g., DSPC processors)
  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

• High Power Density & Efficiency: 400W output in a compact DIN rail form factor—delivers 3.2W/cm³ power density, 50% higher than low-density alternatives; 92% peak efficiency (at 50%~75% load) reduces energy consumption and heat generation, lowering operating costs for 24/7 systems (e.g., $50~$100/year in energy savings per unit).
• Global AC Input & Surge Protection: 100V~240V AC auto-adaptive input + 2kV surge protection—works with global mains voltages (no manual voltage switching), simplifying international deployments; surge protection withstands lightning-induced spikes and grid transients, a leading cause of power supply failure in industrial environments.
• Parallel Operation for Redundancy/Scalability: Supports up to 4 units in parallel (via optional parallel kit)—enables N+1 redundancy (e.g., 2 units for 400W load) to ensure 99.999% power availability, critical for mission-critical processes (e.g., chemical batch production); also scales power output to 1600W for high-load systems (e.g., large distributed I/O networks).
• Ultra-Stable Regulated Output: ±0.5% line regulation + ≤50mVpp ripple—delivers consistent DC power to sensitive AC500 components (e.g., analog I/O modules, DSPB signal boards); eliminates voltage fluctuations that cause false sensor readings or PLC logic errors, ensuring reliable system operation.
• Comprehensive Protection Mechanisms: Overload/overvoltage/short-circuit/over-temperature protection—covers all common electrical faults (e.g., shorted sensor wiring, grid voltage spikes); hiccup-mode protection auto-recovers from temporary faults (e.g., momentary overloads), while latching overvoltage protection prevents permanent damage to expensive PLC hardware.
• Fanless Industrial Design: Aluminum housing for passive heat dissipation—eliminates internal fans, reducing maintenance needs (no fan cleaning/replacement) and failure points (fans account for 30% of power supply failures); suitable for dusty or dirty environments (e.g., mining, cement plants) where fans clog with debris.
• Remote Monitoring Capability: Optional RS-485 Modbus RTU interface—enables remote monitoring of input voltage, output current, temperature, and fault status via SCADA or HMI (e.g., ABB CP600); supports predictive maintenance (e.g., alerting to rising temperatures before shutdown), reducing unplanned downtime.

3. Application Fields

• Manufacturing Automation: PLC Power Distribution:
  • Automotive Assembly Plants: Powers AC500 PLC systems for robotic cell control—24V DC output supplies 1× DSPC172 processor, 8× DSMB I/O modules, and 2× DSRF182 I/O frames; parallel operation (2 units) ensures no downtime during power supply maintenance; fanless design withstands metal dust from welding operations.
  • Electronics SMT Factories: Supplies power to AC500 systems for SMT line control—stable 24V DC (≤50mVpp ripple) ensures accurate analog sensor readings (e.g., solder paste temperature); active PFC complies with factory power quality standards; remote monitoring alerts to voltage anomalies before they affect production.
• Process Control: Hazardous Environment Power:
  • Chemical Plants: Powers AC500 DCS auxiliary systems—-25℃~+70℃ operating range suits unconditioned control rooms; surge protection withstands grid spikes from chemical pumps; 400W output supports 1× DSPC155 processor, 6× DSMB I/O modules, and 1× DSRF180A remote I/O hub for reactor auxiliary control.
  • Oil Refineries: Supplies power to AC500 systems for pipeline monitoring—fanless design resists oil mist and dust; overvoltage protection prevents damage to PLC modules from transient spikes; 24V DC output powers remote sensors (e.g., pressure transmitters) via DSRF180A modules.
• Energy & Utilities: Critical Infrastructure Power:
  • Power Substations: Powers AC500 systems for auxiliary control (cooling fans, battery chargers)—parallel N+1 redundancy ensures 99.999% availability; wide temperature range (-25℃~+70℃) suits outdoor substation cabinets; EMC immunity resists interference from high-voltage switchgear.
  • Solar PV Plants (100MW+): Supplies power to AC500 systems for inverter control—auto-adaptive AC input works with variable generator output; 24V DC output powers 1× DSPC3122 processor and 4× DSRF180A remote I/O modules; remote monitoring via Modbus tracks power usage for grid compliance.
• Infrastructure & Transportation: Rugged Power Needs:
  • Metro Station Control Rooms: Powers AC500 systems for HVAC/lighting control—DIN rail mounting fits standard control cabinets; 24V DC output supplies 1× DSPC3001 processor and 6× DSMB I/O modules; over-temperature protection withstands cabinet heat buildup during summer.
  • Mining Operations: Powers AC500 systems for underground crusher control—fanless design resists coal dust; vibration resistance (1g) withstands mining equipment shocks; 24V DC output powers 1× DSPC157 processor and 4× DSRF180M digital input modules for sensor monitoring.

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