PU1 - Power Supply Unit, 110 VDC, 75 W (Product Discontinued)

The 3U 12HP power supply unit PU1 is a plug-in device for 19" systems (e.g. VMEbus, CompactPCI) and is especially designed for railway computer systems, being fully compliant with EN 50155.

The 1.5 kV (effective) optically isolated PSU comes with a nominal input voltage of 110 VDC with a wide input range of 77..137.5 V (max. input voltage range 66..154 V according to EN50155) and a single output of 5 V at 75 W. It works up to +85°C without derating, delivering a thermal warning at over-temperature andswitching off at +95°C.

The PSU supports an error signal (5 ms hold-up time), reverse-connect protection, permanent short-circuit protection, voltage control, synchronization, voltage in fail (ViF) and voltage out fail (VoF) as well as remote on/off.

The subassembly is immersion-painted und partially cast, and components are secured against vibration. The thermal stress is extremely low due to integrated heat sinks and diversion of dissipated heat over the mounting surface.

Features

  • 19" rack mountable (VMEbus, CompactPCI)
  • 3U, 12 HP
  • Input 110 VDC nom. (77..137.5 V)
  • Max. input voltage range 66..154 V (according to EN 50155)
  • Output 5.1 V
  • Power 75 W
  • H15 DIN 41612 plug connector (front and rear)
  • -40 °C to +85 °C without derating
  • Conformal coating
  • Complies with EN 50155 (railways)

Specifications

General
  • Standard Euro rack size 19"
  • Integrated heat sink for extremely low thermal stress to temperature sensitive components
  • Glued parts for better vibration resistance
  • Overtemperature and overvoltage shutdown
  • Short circuit protection
  • Remote on/off
  • LEDs: green LED indicates correct input voltage, yellow LED indicates operating mode
  • Fixed switching frequency 200kHz
  • Reverse polarity protection by internal protector
  • Thermal Warning (TW)
    • Operating criteria: Overtemperature shutdown -5K (Risk of overtemperature exists.)
    • Output TW: Output with NPN transistor, emitter connected with V out-; max. current 30mA
  • Hold-up Time
    • According to EN 50155 Class S2 for P out 75W
  • Supply Fail (FAL)
    • Output FAL: Isolated optocoupler output with NPN transistor
    • Current: 5mA
    • Voltage max.: 5V
    • Pins: Open collector FAL, emitter FAL connected to V out-
    • Isolation: FAL-V in: 1.500 Vrms
  • Sense (S)
    • Provides compensation of voltage drops (max. 0.2V each line) between power supply and load
    • Pins S+ and S- of converter must be connected to load
  • Shutdown interrupt (SD-INT)
    • SD-INT in: 24V
    • SD-INT out current: 5mA
    • SD-INT out voltage: 5V
    • SD-INT out pins: Collector pull-up resistor 10K to V out+
    • SD-INT out isolation: SD-INT in to SD-INT out: 1.500 Vrms
Input Characteristics
  • Nominal voltage input: 110V DC
  • Wide input range: 0.7 x nominal voltage < nominal voltage < 1.25 x nominal voltage (according to EN 50155)
    • 77..137.5 VDC
  • Max. input voltage range: 0.6 x nominal voltage < nominal voltage < 1.4 x nominal voltage with full functionality for 0.1 s, no damage for 1 s (according to EN 50155)
    • 66..154 VDC
  • Voltage on threshold: 1.1V
  • No load input current: 15mA
Output Characteristics
  • Output: 5V/75W
  • Accuracy: ±0.5%
  • Voltage deviation: 12%
  • Rise time: 80ms
  • Overvoltage protection: 1.2V
  • Overcurrent protection: 1.08A min., 1.15A max.
  • Overtemperature shutdown: 101°C min., 105°C typ., 107°C max.
Connection
Input and output via DIN 41612 plug connector, type H15
Electrical Specifications
  • Isolation
    • Input/output: 1500V eff
    • Input/case: 1500V eff
    • Output/case: 500V eff
  • MTBF: tbd. @ 50°C (derived from MIL-HDBK-217F)
Mechanical Specifications
  • Dimensions: 3U, 12HP, 128.4mm height
  • Weight: ca. 1395g
Environmental Specifications
  • Temperature range (operation): -40..+85°C
  • Temperature range (storage): -40..+105°C
  • Shock: according to IEC 68-2-27
  • Continuous shock: according to IEC 68-2-29
  • Vibration: according to IEC 68-2-6
  • Protection
    • Class of protection: Class I, EN 60950
    • Degree of protection: IP20 (inserted in rack), DIN 40050 (IEC 529)
  • Pollution degree: 2 (EN 60950)
Safety
Tbd.
EMC
Tbd.