12
1.
Verify that the workbench is sturdy and reliably grounded.
2.
Place the switch with bottom up, and clean the round holes in the chassis bottom with dry cloth.
3.
Attach the rubber feet to the four round holes in the chassis bottom.
4.
Place the switch with upside up on the workbench.
Grounding the switch
WARNING!
Correctly connecting the switch grounding cable is crucial to lightning protection and EMI protection.
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
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.
Connecting the grounding cable to the chassis
1.
Remove the grounding screw from the rear panel of the chassis.
2.
Use the grounding screw to attach the ring terminal of the grounding cable to the grounding screw
hole.
Make sure
the ring terminal and cable do not interfere with expansion card installation.
3.
Verify that the grounding cable has been securely connected to the rear grounding point.