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PU20 - Wide-Range Power Supply Unit for Railway Systems, 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 3U 6 HP Wide-Range PSU for Railway Systems, 24 to 110 VDC, 120 W
  • PU20 Product Image

Main Features

  • 3U, 6 HP, 19" rack mountable
  • Automatic input voltage range detection for 24, 72, 110 VDC
  • Configurable voltage range for 36, 48, 74, 96 VDC
  • Output power 120 W without derating
  • Holdup time 10 ms according to Class S2
  • Active power sharing
  • Inverse current protection
  • Redundant output voltage monitoring
  • H15 rear connector
  • -40 to +85 °C with qualified components
  • Conformal coating
  • Fully S-9401 compliant
  • Prepared for EN 50155 compliance
  • Prepared for SIL applications
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 14.6..156 VDC
    • Automatic input voltage range detection for 24, 72, 110 VDC
    • Configurable voltage range for 36, 48, 74, 96 VDC
    • Power-on/-off threshold
  • Input voltage range
    • Nominal input voltage of 74 VDC provided (according to S-9401)
    • Voltage range for 74 VDC is 20..130 VDC
  • Power Variations
    • No functional disturbance with input voltage variations of 0.6 x Un < 1.4 x Un for 0.1 s
    • No functional disturbance with input voltage variations of 1.25 x Un < 1.4 Un for 1 s
  • Inrush current limiting
Output Characteristics
  • Output voltages: 12 VDC, 5 VDC and 3.3 VDC
  • Standby output voltage: 5 VDC with a 5 W load
  • Accuracy:
    • +3.3V (-1%/+3% of the nominal value)
    • +5V (-1%/+2% of the nominal value)
    • +12V (-3%/+4% of the nominal value)
    • +5VSB (-1%/+2% 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 between 12 VDC output and 5 VDC output, including 3.3 VDC
Connection
Type H15, DIN 41612 plug connector
Control and Status Indicator
Three ports on secondary side
  • Switches output voltages
  • Indicates input power failure, output voltage failure or fail-over temperature
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
  • Status LED on front panel
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 range (operation): -40..+70°C (85°C/10 mins), no derating
  • Temperature range (storage): -50..+85°C
  • Temperature: 70°C, with up to 85°C for 10 minutes according to class Tx (EN 50155)
  • EMC Emission:
    • EN 55022: CISPR 22 - Class B
    • FCC 15.109 and S-9401
  • EMC Immunity: EN 55024 - Class A
  • Airflow: Convection cooling
  • 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 - 200 Hz (EN 61373)
  • Vibration (lifetime): 11.44 m/s², 5 Hz - 200 Hz (EN 61373)
MTBF
min. 600 000h @ 40°C according to IEC/TR 62380 (RDF 2000)
Safety
  • Flammability
    • PCB manufactured with a flammability rating of 94V-0 by UL recognized manufacturers
  • Electrical Safety
    • EN 60950-1
    • Insulation measurement test according to EN 50155 (12.2.9.1)
    • Voltage withstand test according to EN 50155 (12.2.9.2)
EMC Conformity
  • 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)

Options

Output voltage
Available in two different models:
  • 14.4 VDC..156 VDC
  • 9 VDC..36 VDC
Cooling Concept
Also available with conduction cooling in MEN CCA frame
Some of these options may only be available for large volumes.
Please ask our sales staff for more information.

Ordering Information

Standard PU20 Models
17PU20-00

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