DCN DCS-3950-10C Installationshandbuch - Seite 17
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DCS-3950 series Installation manual
A good grounding system is the groundwork for the smooth and safe operation of the
DCS-3950 series, and an excellent way to prevent lightning strikes and resistance
interference. Please follow the switch grounding specification instructions, verify the
installation site's grounding condition and ensure proper grounding accordingly.
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.
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.
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 DCS-3950 series provides chassis grounding post in the lower rear chassis,
marked as "
". 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:
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.
Bare conductor cabling is forbidden.
Ground resistance value: the combined grounding resistance should be less than 1
ohm.
2.3.3 Connecting Console
DCS-3950 series provide a RJ45 serial console port.
Chapter 2 Hardware Installation
2-7