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MEN Mikro

MEN Mikro PU8

3U 12HP PSU for 19" systems, 36V DC input

100 W capacity, conformal coating, EN50155 compliant
 
MEN PU8 3U CompactPCI power supply
  
  • 19" rack mountable
  • 3U, 12 HP
  • Input 36 V DC nom.
  • Output 3.3 V, 5 V, 12 V
  • Power 100 W
  • H15 DIN41612 plug connector (front and rear)
  • SMBus
  • External I/Os for key input function
  • Standby mode (< 1 W)
  • -40 to +85°C screened (tbc.)
  • Conformal coating
  • EN 50155 compliant (holdup time according to Class S2)
  • ROHS compliant



Datasheet/Manual:

MEN PU8 datasheet in PDF format MEN Mikro PU8 Datasheet - PDF
Manual available on request Manual available on request

 

Introduction

The PU8 is a plug-in power supply unit for 19" systems (e.g. VMEbus, CompactPCI®) and is especially designed for computer systems in public transport vehicles, being fully compliant with EN 50155.

The PU6 is designed for a nominal input voltage of 36 VDC (25.2V to 45V). The otherwise identical PSU model PU5 is available for higher nominal input voltages (110 VDC, 66 to 154 V).

It is controlled by a microprocessor which supervises the voltage and the temperature as well as one external input (for its key input function) and one output.

Thanks to the onboard intelligence the PSU can also act as an SMBus slave and communicate with the CPU board via the backplane. This allows the PSU to power on the system at a programmed date and enables the CPU to make status polls with regard to, e.g., error messages, time-out or on/off.

The PSU provides a DC/DC converter to generate the isolated 5 V from the input voltage. Two regulators generate 5 V and 3.3 V from the 12 V isolated side. The maximum power at full load is 100 W, minimum power is 5 W. The microprocessor is supplied with power independently and can turn off the main DC/DC converter to switch the unit into standby mode (power consumption less than 1 W).

The subassembly is conformally coated and components are secured against vibration. The PSU operates in -40 to +85°C environmental temperature without derating (an 8-HP version with derating tbd. featuring a smaller heat sink is also available on request). The thermal stress is extremely low due to integrated heat sinks and diversion of dissipated heat over the mounting surface
 
 

Specification

Microcontroller:

Output voltage and temperature supervision (readable via SMBus)
Overtemperature and overvoltage shutdown
Communication with CPU
Watchdog functionality
Independent power supply for operation during standby mode (power consumption less than 1 W)

SMBus:

Signals on back connector
Voltage level 3.3V
Controlled by CPU
Communication between the power supply unit and the CPU

Binary I/O:

1 binary input

  • Voltage level according to external power supply input voltage (max. 36 VDC)
  • Electrically isolated
  • External switch (key) with binary input
  • Switch-on by key input or wake on time
  • Switch-off by key input or software
  • Status of binary inputs readable via SMBus

1 binary output

  • Voltage level according to external power supply input voltage
  • Isolated by relays
  • User-specific functionality (controllable via SMBus)
  • Maximum switching power: 60W (example 110V/0.5A)

Miscellaneous:

DC/DC Converter, fuse-protected
Two status LEDs on front panel

  • Green LED indicates correct input voltage
  • Yellow LED indicates correct output voltage

Alternative power supply at the backplane for use as redundant PSU
Short circuit protection
Reverse polarity protection by internal protector

Input Characteristics:

Nominal voltage input: 36VDC
Wide input range: 0.7 x nominal voltage < nominal voltage < 1.25 x nominal voltage (according to EN50155)

  • 25.2 to 45 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 EN50155) o 21.6..50.4 VDC
No load input power: < 1.6 W in standby mode

Output Characteristics:

Output power (max.): 100W
Output power (min.): 5W
12V tolerance/overvoltage protection: ±5%
5V tolerance/overvoltage protection: +5%/-3%
3.3V tolerance/overvoltage protection: ±3%
Overtemperature shutdown: 50°..90°(adjustable by SMBus command)
Holdup time according to EN50155 Class S2

Connection:

Input and output via DIN 41612 plug connector, type H15

Electrical:

Isolation (according to EN50155)

  • Input/output: 1500VDC/1000V eff
  • Input/shield: 1500VDC/1000V eff
  • Output/shield: 1500VDC/1000V eff
  • Ground/shield: 1500VDC/1000V eff

Mechanical:

Dimensions: 3U, 12HP, 128.4mm height
Integrated heat sink
Weight: tbd.

Environmental:

Temperature range (operation): -40 to +85°C (no derating)
Temperature range (storage): -40°C to +85°C
Airflow: min. 10m³/h
Shock: according to EN60068-2-27
Continuous shock: according to EN60068-2-29
Vibration: according to EN60068-2-6
Protection

  • Class of protection: Class II, EN 60950
  • Degree of protection: IP20 (insert in rack), EN60529

MTBF:

190,000+ h @ 40°C according to IEC/TR 62380 (RDF 2000)

EMC:

Tested according to EN55022 (radio disturbance), EN61000-4-2 (ESD), EN61000-4-4 (burst) and EN61000-4-5 (surge)

Software:

Driver software for SMB communication for Windows®, Linux, VxWorks®

ROHS Status:

This product is lead free/ROHS compliant.

Ordering Details:

Board:

17PU08-00 12HP, 25.2..45 VDC (36 V nom.), coated, -40..+85°C screened

Accessories:

17PU05-00 12HP, 66..154 VDC (110 V nom.), coated, -40..+85°C screened

Further Information:

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