Hardware Installation and Reference Guide
Preparation before Installation
The building must provide protective grounding connection to ensure that the device is connected to the protection
location.
The installation and maintenance personnel must check whether the A.C. socket is well connected to the protection
location of the building, if not, they should use a protective grounding wire to connect the grounding end of the A.C.
socket to the building's protection location.
The power supply socket must be installed in a place that is near to the device and where users can operate the
device easily.
Before the installation of the device, make sure that ground connection is connected at first and disconnected finally.
The sectional area of the protective grounding wire should be at least 0.75 mm
2
(18 AWG).
Use the 3-core power supply line. The sectional area of each pin should be at least 0.75 mm
2
or 18 AWG.
Lightning Grounding
The lightning protection system of a facility is an independent system that consists of the lightning rod, download
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.
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 resistance of earth wires should
be less than 1 ohm. The XS-S1920 series switch back plane is reserved with one grounding pole, as shown in Figure 2-1.
Figure 2-1Grounding of XS-S1920
2.2.6
Lightning Resistance
When the AC power cable is imported outdoors and directly connected to the power port of the XS-S1920 series switch,
lightning line bank should be adopted to prevent the switch from being hit by lightning shocks. Usage of the lightning line
bank: Connect the mains supply AC cable to the lightning line bank. Then, connect the switch to the lightning line bank.
This can help to prevent the current of high-voltage lightning from passing the switch directly through the mains supply
cable to a certain extent.
The lightning line banks are not provided and should be purchased by users as required.
For the usage of lightning line banks, refer to their related manuals.
