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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.
PU20 - Wide-Range Railway Power Supply Unit
PU20 - Wide-Range Railway Power Supply Unit
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
- Conformal coating
- Input voltage according to S-9401
- EN 50155 compliance
Technical Data
Input Characteristics
- Nominal voltage input: 24 V, 36 V, 48 V, 72 V, 96 V, 110 V (according to EN 50155)
- 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
17PU20-03
120 W, 3U 6 HP PSU, wide range input 24 to 110 V DC, output 12 V / 5 V / 3.3 V DC, Revision 3.1, -40 to +85°C qualified, conformal coating