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aTCA-81514PA
6.4 Power Components
Figure 14: Power Input
1
AC Input PSU 4
2
AC Input PSU 3
3
AC Input PSU 2
4
AC Input PSU 1
AC power input is provided by 4 IEC 320
‐
C20 connectors at the rear side
of the Shelf.
The Power Distribution Board (PDB) is located behind the AC PSUs. It
provides 4 connectors for the PSUs and a connector for the PMbus
interface to the CAN to I2C bridge function modular.
6.5 PMBus Interface
The Huawei R4850xx series PSU only support communication on the
CAN bus, there is a function modular to implement the bridge from CAN
bus to I2C bus on the Power Distribution Board. The PMBus is routed
from the CAN to I2C bus bridge to the local I2C bus of the fan tray, so that
the PSUs can be managed by the IPM controller of the fan tray.
