ARNING!
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 the faradism and leakage electricity can be safely released to the earth to
minimize EMI susceptibility of the switch.
You can ground the switch in one of the following ways, 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 by using the AC power cord
Grounding the switch with a grounding strip
If a grounding strip is available at the installation site, connect the grounding cable to the grounding
strip.
main or lightning rod.
CAUTION:
For the 5500-24G-SFP EI (2 slots) and 5500-24G-SFP EI TAA (2 slots) switches, follow the direction
shown in Figure 11 to
connect the grounding cable to avoid affecting the installation and removal of the
power supply.
To connect the grounding cable, for example, to an HP 5500-48G EI (2 slots) switch:
1. Identify the grounding point (with a grounding sign) on the rear panel of the switch chassis, and
remove the grounding screw from the grounding point.
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.
Figure 10 sho
ws the grounding terminal position of all 5500 EI and 5500 SI switches but the
5500-24G-SFP EI (2 slots) and 5500-24G-SFP EI TAA (2 slots).
Figure 11 sho
ws the grounding terminal position of the 5500-24G-SFP EI (2 slots) and
5500-24G-SFP EI TAA (2 slots) switches.
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