Huawei USG9500 Series, Hardware Manual

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1.3.4.1 Features of the Power Supply System
This section describes the power supply modes of the USG9520.
The USG9520 supports DC and AC power supply (but not at the same time).
Power modules convert the input voltage into -48 V DC voltage to supply power for the entire
system. The power supply system has the following features:
l Depending on the power supply mode, the power supply system consists of either two
AC power modules or two DC power modules working in 1+1 backup mode.
l Both AC power modules and DC power modules support alarm functions.
1.3.4.2 DC Power Supply System
This section describes the appearance, functions, and technical specifications of the DC power
module.
The USG9520 DC power module is 1 U high, as shown in Figure 1-37 .
The power modules are hot-swappable.
Figure 1-37 DC power module and panel
RUN RUN
ALM ALM
NEG(-) NEG(-)
RTN RTN(+) (+)
OFFO
FF
ON O
N
-48V -- -60V;42A -48V -- -60V;42A
-48V -- -60V;42A -48V -- -60V
;42A
OFFO
FF
ON O
N
The indicators of the USG9520 DC power module are displayed on the panel through LED.
Table 1-27 describes the indicators.
Table 1-27 Description of DC power module indicators
Name Color Description
RUN Green Indicates normal output. If the indicator is steady green,
the PEM has normal output.
ALM Red Indicates power failure. If the indicator is steady red:
l The lightning protection circuit of the PEM is faulty.
l One of the power modules is not receiving input
power.
HUAWEI USG9500 Series
Hardware Guide
1 Hardware Overview
Issue 03 (2017-12-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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