DC Chassis
Figure 1-32
Front panel of the USG9520 DC chassis
4/5
3
2
1
AUX
ACT
MPU
E8KE-X3-MPU
RUN
ALM
ACT
RESET
OFL
LINK
CLK
TOD
MGMT-ETH
CONSOLE
AUX
ACT
MPU
E8KE-X3-MPU
RUN
ALM
ACT
RESET
OFL
LINK
CLK
TOD
MGMT-ETH
CONSOLE
1
2
3
No. Name
Description
1
MPU
The Main Processing Unit (MPU) on the USG9520 is in charge of
system control and route information learning. It is the central control
unit of the device. The USG9520 MPUs work in 1:1 backup mode.
When the active MPU is faulty, the standby MPU immediately takes
over for it, ensuring service continuity.
2
LPU/SPU
slot
Holds an LPU or SPU.
3
ESD jack
The equipment end of the wrist strap is inserted into the ESD jack. For
the wrist strap to be effective, ensure that the device is grounded.
Figure 1-33
Rear panel of the USG9520 DC chassis
High touch current,earth connection essential
before supply and/or telecommunication
network connections
WARNING
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൞䘔⭫Ⓠⴈ䙐ؗ㖇㔒ҁࢃൽ亱ݾ൦
Air Filter
Refer to diagram of
cable routing.The air
filter can not be
covered by cables.
䈭⽰ᝅഴ䎦㓵θ
㓵㔼уᗍ䚤ᥗ䱨㖇
STATUS
Don’t touch the
fan leaves before
they slow down.
ћ⾷൞伄儎䙕
ᰁ䖢ᰬ䀜ਬ
RUN
NEG(-)
RTN
(+)
ALM
ON
OFF
OFF
NO
RUN
NEG(-)
RTN
(+)
ALM
ON
OFF
OFF
NO
1
3
2
5
4
-48~-60V;42A
-48~-60V;42A
HUAWEI USG9500 Series
Hardware Guide
1 Hardware Overview
Issue 03 (2017-12-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
54