Hardware Installation and Reference Guide Preparing for Installation
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The lightning protection system of facilities is an independent system composed of a lightning rod, a downlead conductor, and a
connector connected to the grounding system. The grounding system is usually used for power reference grounding and safe
grounding of the cabinet. Lightning grounding is required only for facilities and is not required for the device.
EMC Grounding
Grounding required for electromagnetic compatibility includes shielded grounding, filter grounding, noise and interference
suppression, and level reference, which contribute to the overall grounding requirements. The resistance of the ground cable should
be smaller than 1 ohm. Each of the RG-S2915-L series switches provides one grounding connector on the back panel, as shown in
Figure 2-1.
Figure 2-1 Grounding of RG-S2915-L Series Switches
Lightning Protection Requirements
When an AC power cord is introduced from outdoors and directly connected to the power port of the switch, the AC power port must
be connected to an external lightning resistance socket to protect the switch against lightning strokes. The lightning resistance socket
is used as follows: Connect the mains AC power cable to the lightning resistance socket and then connect the switch to the lightning
resistance socket. This, to some extent, prevents the current of high-voltage lightning from directly passing through the switch along
the mains cable.
Lightning resistance sockets are purchased by customers as required.
For details of lightning resistance sockets, see the related user guide.
2.2.6 EMI Requirements
All interference sources, either from outside or inside of the device or application system, affect the device by capacitive coupling,
inductive coupling, or electromagnetic waves.
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