H3C Technologies H3C S5120 Series Switches - Manual (Page 20)

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3. Attach the rubber feet to the four round holes on the chassis bottom.
4. Place the switch with upside up on the workbench.
IMPORTANT:
•
Ensure good ventilation and a space of 10 cm (3.94 in) around the chassis for heat dissipation.
• Avoid heavy objects on the switch.
Grounding the switch
CAUTION:
•
Correctly connecting the switch grounding cable is crucial to lightning protection and EMI protection.
• The power input 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. 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
CAUTION:
Connect the grounding cable to the grounding system in the equipment room. Do not connect it to a fire
main or lightning rod.
The S5120-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 ring terminal of the grounding cable.
3. Use a screwdriver to fasten the grounding screw into the grounding screw hole.