H3C Technologies H3C S5500 Series Switches - Manual (Page 41)

33
Grounding the switch
CAUTION:
•
Correctly connecting the switch grounding cable is crucial to lightning protection and EMI protection.
• The power and grounding terminals in this section are for illustration only.
The power input end of the switch has a noise filter, whose central ground is directly connected to the
chassis to form the chassis ground (commonly known as PGND). You must securely connect this chassis
ground to the earth so that the faradism and leakage electricity can be safely released to the earth to
minimize EMI susceptibility of the switch.
You have the following approaches to grounding the switch depending on the grounding conditions
available at the installation site:
• Grounding the switch with a grounding strip
• Grounding the switch with a grounding conductor buried in the earth ground
• Grounding the switch in other grounding environments
Grounding the switch with a grounding strip
The S5500-EI Switch Series has a grounding point (with a grounding sign) at the rear panel.
To connect the grounding cable:
1. Remove the grounding screw from the rear panel of the switch chassis.
2. Attach the grounding screw to the OT terminal of the grounding cable.
3. Use a screwdriver to fasten the grounding screw into the grounding screw hole.
Figure 26 Connecting the grounding cable to the grounding hole of switch
(1) Rear panel of the switch (2) Grounding sign
(3) Grounding hole (4) OT terminal
(5) Grounding cable (6) Grounding screw