Connecting The Ground Wire - H3C S3600 Series Installation Manual

Step1 Connect one end of the grounding wire (delivered with the switch) to the grounding screw and the other
end to the ground nearby.
Step2 Use a flat-blade screwdriver to loosen screw 1 and screw 2 on the DC input terminal block. Connect DC
power terminals of the switch to –48 VDC power supply through DC power cables, with NEG (-)
connected to the –48V output of the –48 VDC power supply and RTN (+) to the working ground. Tighten
screw 1 and screw 2 respectively to fix the power cables.
Step3 Check whether the PWR LED on the front panel of the switch is ON. If yes, the power is properly
connected.
Before powering on the switch, you should properly connect the grounding wire.
The DC power cable should be less than 3 m (9.84 ft.) long.

Connecting the Ground Wire

Correctly connecting the switch ground wire is crucial to the lightning protection and
electromagnetic susceptibility (EMS) of a switch.
Locations of the power input and grounding screw on the chassis illustrated in this section may be
different from those on your device.
The power input end of the switch is connected with a noise filter, whose central ground is directly
connected to the chassis, forming the chassis ground (commonly known as PGND). This chassis
ground must be securely connected to the earth ground so that the faradism and leakage electricity can
be safely released to the ground, enhancing the EMS capability of the switch.
Ground your switch as follows:
When a grounding strip is available at the installation site, attach one end of the yellow/green
ground wire of the switch to the grounding screw on the grounding strip and fasten the captive nut.
(Note that the fire main and lightning rod of a building are not suitable for grounding the switch. The
ground wire of the switch should be connected to the grounding device for the equipment room.)
3-7