12
Grounding the switch
CAUTION:
•
Correctly connecting the grounding cable for the switch is crucial to lightning protection and EMI
protection.
•
As a best practice to guarantee the grounding effect, connect the grounding cable provided with
the switch to the grounding strip in the equipment room.
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.
NOTE:
The power and grounding terminals positions in the figures in this section are for illustration only.
CAUTION:
Connect the grounding cable to the grounding system in the equipment room. Do not connect it to a
fire main or lightning rod.
To connect the grounding cable:
1.
Attach the two-hole grounding lug of the grounding cable to a grounding point on the chassis.
For more information, see "
Connecting the grounding cable to the chassis
."
2.
Remove the hex nut of a grounding post on the grounding strip.
3.
Attach the ring terminal of the grounding cable to the grounding post on the grounding strip, and
secure the ring terminal to the grounding post with the hex nut.
Figure 15 Connecting the grounding cable to a grounding strip
(1) Hex nut
(2) Ring terminal
(3) Grounding post
(4) Grounding strip
3
2
1
4
