H3C WX5004 Installation Manual page 23

WARNING!
The ground wire of the access controller should be connected to the grounding system in the
equipment room. The fire main and lightning rod of a building are not good grounding options.
When a grounding strip is unavailable
If earth is available nearby and allows a grounding body to be buried, hammer an
1.
angle steel or steel pipe longer than 0.5 m (1.64 ft) into the earth. In this case, weld
the yellow-green PGND wire of the access controller onto the angle steel or steel
pipe, and treat the joint for corrosion protection.
Figure 7 Ground the access controller through a grounding body
(1)
(1) AC power socket
(4) Earth
CAUTION:
The following method applies to the device using AC power input.
If no grounding body is allowed to be buried and the access controller is AC
2.
powered, you can ground the access controller through a PE wire of the AC power
supply. In this case, make sure the PE wire is well connected to the ground in the
power distribution room or on the AC transformer side.
(5)
(2) Grounding terminal
(5) Angle steel
23
(2)
(3)
(4)
(3) PGND wire