Huawei Technologies Proprietary
4-6
II. AC power socket (recommended)
You are recommended to use a three-terminal single-phase power socket with ground
contact, which must be grounded reliably. Normally, the ground contact of the power
supply system in a building was buried during construction and cabling. Still, before
connecting the AC-input power cord, you must make sure that the power supply of the
building is well grounded.
III. Connecting the AC-input Power Cord
Follow these steps to connect the AC-input power cord:
1) Check that the PGND is securely connected to the earth ground.
2) Make sure that the power switch of the router is in the OFF position. Insert one end
of the power cord accompanying the router into the power socket on the chassis
rear panel, and fix the cable onto the cable-retention clip with a cable strap.
Connect the other end of the cable to an AC power source at your installation site.
3) Place the power switch of the router to the ON position.
4) Check that the PWR LED on the front panel of the router is on for correct
connection.
4.5.3 Connecting the DC-Input Power Cord
I. DC-input power supply
DC input range: –48 VDC to –60 VDC
The following figures show the power sockets on DC-powered routers.
z DC input for the AR 28-10/28-11
(1) (2)
-48 -60V
BGND -48V PGND
1) Power switch 2) DC input receptacle
Figure 4-5 DC-input power socket on the AR28-10/28-11
z DC input for the AR 28-12/28-13/28-14
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