63
EES4710BD 10 Slots L2/L3/L4 Chassis Switch
z Proper grounding
When using an AC power source, the device must be grounded with the green and yellow
ground cables, otherwise, shock hazards may occur when insulation resistance between the
internal power supply and the chassis degrades.
z Lightning protection grounding
The lightning protection system is an independent system consisting of a lightning rod,
conductor and connection joint with the grounding system. The grounding system usually is
shared with the power reference grounding and green and yellow ground cable grounding.
Lightning protection grounding is a building requirement, not a specific requirement of the
switch.
z Electromagnetic compliance grounding
This refers to the grounding to comply with switch electromagnetic compatibility requirements,
including shielded grounding, filter grounds, noise, and interference control and level reference.
The overall grounding requirements are the sum total of the above. Ground resistance value
should be less than 1 ohm.
The ES4710BD provides 2 chassis grounding posts in the lower rear chassis, marked as “GND”.
Chassis protection grounding should be properly connected to the rack grounding connector
The ground cabling procedures are listed below:
Step 1: remove the nuts from the rear chassis grounding posts
Step 2: wrap one end of the green and yellow grounding cable to the grounding posts
Step 3: attach the grounding post nut and tighten well
Step 4: attach the other end of the grounding cable to the rack grounding connector
Note:
z The grounding cable should be made of a good conductor, and the diameter should be
determined by the possible maximum current that may pass through.
z Bare conductor cabling is forbidden.
z Ground resistance value: the combined grounding resistance should be less than
1 ohm.
2.3.3 Card and module installation The ES4710BD is a rack-mounting device, various cards and modules are available.
Basic configuration: chassis, power supply modules (optional 2 +1 redundant), system backplane,
fan tray, dust gauze, distribution box. The above parts have been mounted upon shipment, please
verify they are properly locked before installation.