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PU20 - Wide-Range Railway Power Supply Unit, 24 to 110 VDC, 120 W

3U 6 HP PSU

The PU20 is a plug-in power supply unit for 19" systems (e.g. VMEbus, CompactPCI) and is fully compliant with EN 50155.

Download data sheet

  • PU20 Product ImagePU20 - Wide-Range Railway Power Supply Unit
  • PU20 Product ImagePU20 - Wide-Range Railway Power Supply Unit
  • PU20 Product Image
  • PU20 Product Image

Main Features

  • 3U, 6 HP, 19" rack mountable
  • Wide range input 24 V DC to 110 V DC nominal
  • Configurable voltage range for 24, 36, 48, 74, 96 V DC
  • Output power 120 W without derating
  • Hold up time 10 ms (EN 50155 Class S2)
  • Active power sharing
  • Inverse current protection
  • H15 rear connector
  • -40°C to +85°C with qualified components
  • Conformal coating
  • Input voltage according to S-9401
  • EN 50155 compliance
PU20 Product Image

Technical Data

Input Characteristics
  • Nominal voltage input: 24 V, 36 V, 48 V, 72 V, 96 V, 110 V (according to EN50155)
    • Max. input power range of 14.4 VDC to 154 VDC or
    • 9 VDC to 36 VDC (on request)
    • Configurable voltage range for 24, 36, 48, 74, 96, 110 VDC or wide range
    • Power-on/-off threshold according to EN 50155
    • Nominal input voltage of 74 VDC provided (according to S-9401)
    • Voltage range for 74 VDC: 20 to 130 VDC
    • Power-on/-off threshold according to EN 50155
  • Power Variations
    • No functional disturbance with input voltage variations according to EN 50155
  • Inrush current peak: 35 A for max. 150 ms at 24 VDC input voltage
Output Characteristics
  • Output voltages: 12.6 VDC, 5 VDC and 3.3 VDC
  • Output currents: 9.5 A for 12.6 VDC, 24 A for 5 VDC and 9.1 A for 3.3 VDC
  • Total maximum power consumption: 120 W
  • Standby output voltage: 5 VDC with a 5 W load
  • Accuracy:
    • +3.3 V (-1%/+1% of the nominal value)
    • +5 V (-1%/+1% of the nominal value)
    • +12.6 V (-1%/+1.5% of the nominal value)
    • +5 VSB (-1%/+1% of the nominal value)
  • Holdup time: 10 ms according to Class S2
  • Dynamic load distribution
    • 120 W for complete temperature range without forced airflow
    • Load sharing: 220 W with 2 PSUs, 330 W with 3 PSUs
Front Interfaces
1 Status LED
Rear Interfaces
  • Type H15, DIN 41612 plug connector
  • Overtemperature, PS_ON and power good signal for input and output
Parallel Connection
Up to six power supply units can be used in parallel
  • Extends availability (backup protection against faults)
  • Extends power
  • Increases performance
  • Ensures redundancy
Miscellaneous
  • Overload and short circuit protection
  • Standby voltage at power down, always available
  • Reverse polarity protection for input voltage and short circuit
  • Output voltage and temperature supervision
  • Overtemperature and overvoltage shutdown
Electrical Specifications
Isolation (according to EN 50155)
  • Input/output: 3100 VAC
  • Input/shield: 3100 VAC
  • Output/shield: 1000 VAC
Mechanical Specifications
  • Dimensions: 3U, 6HP
  • Integrated heat sink
  • Weight: 630 g
Environmental Specifications
  • Temperature: -40° to 70°C, with up to 85°C for 10 minutes according to class TX (EN 50155) (assembled in the rack)
  • Temperature range (storage): -50°C to +85°C
  • Cooling concept
    • Air-cooled, natural convection, or
    • Air-cooled, forced convection with fan tray at system bottom
    • Conduction-cooled in MEN CCA frame
  • Cooling test according to EN 60068-2-1
  • Dry heat test according to EN 60068-2-2
  • Shock: 50 m/s², 30 ms (EN 61373)
  • Vibration (function): 2.02 m/s², 5 Hz to 200 Hz (EN 61373)
  • Vibration (lifetime): 11.44 m/s², 5 Hz to 200 Hz (EN 61373)
MTBF
600 000 h min. @ 40°C according to IEC/TR 62380 (RDF 2000)
Safety
  • Flammability (PCBs)
    • UL 94 V-0
  • Fire Protection
    • EN 5510-2
  • Electrical Safety
    • EN 60950-1
    • UL 60950-1 (UL certification no: Dk-52670-UL)
    • CAN/CSA C22.2
    • Insulation measurement test according to EN 50155 (12.2.9.1)
    • Voltage withstand test according to EN 50155 (12.2.9.2)
EMC
  • EMC line filter required to reach class B for radiated and conducted emissions
  • EMC Emission:
    • EN 55022: CISPR 22 - Class A
    • FCC 15.109 and S-9401
  • EMC Immunity: EN 55024 - Class A
  • EN 50121-3-2 (EMC of rolling stock)
  • EN 55011 (radio disturbance)
  • IEC 61000-4-2 (ESD)
  • IEC 61000-4-3 (electromagnetic field immunity)
  • IEC 61000-4-4 (burst)
  • IEC 61000-4-5 (surge)
  • IEC 61000-4-6 (conducted disturbances)

Ordering Information

Standard PU20 Models
17PU20-00

120 W, 3U 6 HP PSU, wide range input 24 to 110 V DC, output 12 V / 5 V / 3.3 V DC, -40°C to +85°C qualified, conformal coating

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