Power Supply System Structure - Huawei ATN 950B Hardware Description

ATN 950B Multi-service Access Equipment
Hardware Description

2.1 Power Supply System Structure

When DC power supplies are directly input to the ATN 950B, the two PIU boards form 1+1 hot
backups. When the EPS30-4815AF external AC power supply system provides power supplies
to the ATN 950B, it converts two AC power supplies into two DC power supplies, and outputs
the two DC power supplies to the two PIU boards. The two DC power supplies form 1+1 hot
backups.
Figure 2-1
power supplies are sent to the CXP and PIC. The CXP and PIC combine power supplies and the
combined power supply provides power to them. In addition, the CXP converts -48 V or -60 V
power supplies into 12 V power supplies to provide power to the FAN.
Figure 2-1 DC power supply structure
Figure 2-2
power supplies into DC power supplies and provides power supplies to the ATN 950B.
Figure 2-2 AC power supply structure
EPS30-4815AF
Issue 03 (2012-07-23)
shows the DC power supply structure. Through the backplane, two -48 V or -60 V
Backplane
PIU
PIU
-48V/-60V
12V
shows the AC power supply structure. The EPS30-4815AF converts external AC
PIU
PIU
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Copyright © Huawei Technologies Co., Ltd.
PIC
CXP
Backplane
-48V/-60V
12V
220V AC
2 Power Supply System
FAN
PIC
CXP FAN
10