12
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 a switch by using a grounding strip at the installation site or the AC power cord
connected to the switch.
NOTE:
The power and grounding terminals in this section are for illustration only.
Grounding the switch with a grounding strip
WARNING!
Connect the grounding cable to the grounding system in the equipment room. Do not connect it to a
fire main or lightning rod.
If a grounding strip is available at the installation site, connect the grounding cable to the grounding
strip.
To connect the grounding cable:
1.
Attach the two-hole grounding lug at one end of the grounding cable to a grounding point on the
switch chassis (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 at the other end of the grounding cable to the grounding strip through
the grounding post, and fasten the ring terminal with the removed hex nut.
Figure 13 Connecting the grounding cable to a grounding strip
(1) Hex nut
(2) Ring terminal
(3) Grounding post
(4) Grounding strip