20
aTCA-80606PA
7 Power
Hazardous voltage!
Before working ensure that the power is removed from the power connection
cables.
The Power Supplies are not included with the Shelf.
The Shelf accepts Huawei R4850 serial power supplies.
The Shelf can be powered with 230VAC line voltage or 240HVDC input depending on
PSU type.
7.1 Introduction
Two pluggable AC power supplies are located at the front bottom side of the Shelf. The power
supply units are plugged-in from the front side and are hot-swappable. To provide a redundancy
they are arranged in a 1+1 configuration.
The Output voltage of the PSUs is 53.5V DC. Because the nominal supply voltage for
ATCA systems acc. to the PICMG specification is 48V DC, all signal names in this
Manual with exception of this chapter are related to 48V DC.
The PSUs are plugged into a Power Distribution Board (PDB) where the power is divided in
2 output branches towards the backplane.
The power input is provided by an AC mains/line module with IEC 320-C20 connector with
switch.
The R4850XX series PSU only support communication on the CAN bus, but not support
communication on the I2C bus, on the Power Distribution Board, there is one functional
modular to implement the CAN bus to I2C bus bridge so that the R4850XX series PSU can
be managed through the I2C bus.
