ABB DSSR170 power supply unit

• Input Voltage: 100-240 V AC (single-phase, 50/60 Hz); 120-370 V DC (wide compatibility with global power grids)​

• Output Voltage: Regulated 24 V DC (±1% accuracy at full load; ±2% over entire load range)​

• Output Current: 10 A (continuous); 12 A (peak, 10 seconds max for load surges)​

• Output Power: 240 W (max continuous power)​

• Efficiency: Up to 90% (at 50-100% load; meets energy-saving standards)​

• Overcurrent Protection (OCP): Auto-recovery after fault removal (trip current: 11-13 A)​

• Overvoltage Protection (OVP): Latching shutdown (trip voltage: 28-30 V DC; resets via power cycle)​

• Over-Temperature Protection (OTP): Thermal shutdown at 85°C (auto-recovery when temp drops to 75°C)​

• Short-Circuit Protection (SCP): Current-limited mode (prevents damage from output short circuits)​

• Input Surge Protection: EN 61000-4-5 compliant (6 kV contact, 10 kV air discharge for AC input)​

• Dimensions: 150×100×40 mm (Length×Width×Height); compact for DIN rail cabinets​

• Mounting: DIN rail (compliant with EN 50022 standard)​

• Cooling: Convection cooling (no fans; reduces dust ingress and maintenance needs)​

• Operating Temperature: -25°C ~ +70°C (derates 2% per °C above 60°C)​

• EMC Compliance: EN 61000-6-2 (industrial immunity); EN 61000-6-4 (industrial emissions)​

• Industrial Automation: Powers ABB PLCs (e.g., AC 500), digital I/O modules (e.g., DSDI 110A), and sensors in automotive assembly lines​

• Process Control: Supplies stable power to chemical plant DCS modules and valve controllers​

• Power Sector: Powers substation control systems and remote monitoring devices​

• Building Automation: Provides power for HVAC control modules and security system components​

• Mount on EN 50022 DIN rail; reserve 50 mm clearance on all sides for convection cooling​

• Use 1.5-4 mm² copper cables for input/output; tighten terminals to 0.8-1.2 N·m torque​

• Ground the unit via dedicated terminal to reduce electromagnetic interference (EMI)​

• Check status LEDs monthly (green = normal operation; red = fault)​

• Inspect terminals quarterly for corrosion/loose connections; clean with dry soft brush​

• Replace unit if red fault LED remains lit after power cycle (indicates internal component damage)​

• Do not disassemble (voids warranty; internal capacitors retain charge after power-off)​
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