Interface cables should be laid inside the equipment room. Outdoor cabling is prohibited, avoiding damages
to device signal interfaces caused by over-voltage or over-current of lightning.
2.3 System Grounding Requirements
A good grounding system is the basis for the stable and reliable operation of the RG-S3250E series. It is the chief
condition to prevent lightning stroke and resist interference. Please carefully check the grounding conditions on the
installation site according to the grounding requirements, and perform grounding operations properly as required.
The correct connection of grounding lines guarantees the lighting and interference resistance of switches and must
be performed with precision.
2.3.1 Safety Grounding
The equipment using AC power supply must be grounded by using the yellow/green safety grounding cable.
Otherwise, when the insulating resistance decreases the power supply and the enclosure in the equipment, electric
shock may occur.
2.3.2 Lightning Grounding
The lightning protection system of a facility is an independent system that consists of the lightning rod, downlead
conductor and the connector to the grounding system, which usually shares the power reference ground and
yellow/green safety cable ground. The lightning discharge ground is for the facility only, irrelevant to the equipment.
2.3.3 EMC Grounding
The grounding required for EMC design includes shielding ground, filter ground, noise and interference suppression,
and level reference. All the above constitute the comprehensive grounding requirements.The grounding resistance
should be less than 1 ohm. The RG-S3250E backplane is reserved with one grounding pole, as shown in 0
.
Grounding pole
Figure 2-1 Schematic diagram of the RG-S3250E grounding
2.4 Lightning Resistance Considerations
When the AC power cable is imported outdoors and directly connected to the power port of the switch, lightning line
bank should be adopted to prevent the switch from being hit by lightning shocks. The lightning line bank can be fixed
