H3C WX5004 Installation Manual page 22

The power input end of the access controller is connected with a noise filter, whose
central ground is directly connected to the chassis, forming the chassis ground (also
known as PGND). This chassis ground must be securely grounded so that induced and
leaked electricity can be safely discharged to the ground, enhancing the anti-EMS
capability of the access controller.
This section provides procedures for grounding the access controller when a grounding
strip is available (see
unavailable (see When a grounding strip is
When a grounding strip is available
Remove the grounding terminal screw located at the right back of the chassis (see
1.
Figure 6
Fasten the wiring terminal of the yellow-green PGND wire of the access controller to
2.
the grounding terminal screw you removed in step 1.
Put the grounding terminal screw back in the grounding hole on the chassis and
3.
fasten it.
Fasten the other end of the yellow-green PGND wire to the grounding stud for the
4.
access controller on the grounding strip.
On the grounding strip, use a nut to fasten the grounding stud that is attached with
5.
the PGND wire.
Figure 6 Ground the access controller through a grounding strip
(1)
(1) AC power socket
(3) PGND wire
When a grounding strip
22
is available) and when a grounding strip is
unavailable).
(2)
(3)
(4)
(2) Grounding terminal
(4) Grounding strip