Hardware Installation and Reference Guide
Appendix
72
Note
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The power arrester is not delivered with the switch. Please purchase it based on actual requirements.
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Make sure that the PE terminal of the power arrester is well grounded.
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After the AC power plug of the switch is connected to the socket of the power arrester (lightning protection
power strip), the lightning protection function is implemented only if the RUN indicator is green and the
ALARM indicator is OFF.
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If the ALARM indicator on the power arrester is red, check whether it is caused by poor grounding
connection or by the reversed connection of the Null and Live lines. The detection method is as follows:
Use a multimeter to measure the polarity of the power socket for the arrester when the indicator is red. If
the N line is on the left and the L line is on the right (facing the socket), the arrester's PE terminal is not
grounded. If not, the polarity of the arrester power cord should be reversed. In this case, you should open
the power arrester and rectify the polarity of the connection. If the indicator is still red, the arrester's PE
terminal has not been grounded.
Installing the Ethernet Port Arrester
Please connect an Ethernet port arrester to the switch to prevent the damage by lightning before connecting an
outdoor network cable to the switch.
Tools: Phillips screwdrivers or flat-head screwdriver, multimeter, and diagonal pliers
Installation steps:
(1) Tear one side of the protective paper for the double-sided adhesive tape and paste the tape to the housing
of the Ethernet port arrester. Tear the other side of the protective paper for the double-sided adhesive tape
and paste the Ethernet port arrester to the switch housing. The paste position for the Ethernet port arrester
should be as close to the ground terminal of the switch as possible.
(2) Based on the distance between the switch ground terminal and the Ethernet port arrester, cut the ground
cable for the Ethernet port arrester and firmly tighten the ground cable to the ground terminal of the switch.
(3) Use a multimeter to check whether the ground cable for the arrester is in good contact with the ground
terminal and the housing of the switch.
(4) Connect the arrester by using an adapter cable (note that the external network cable is connected to the IN
end, while the adapter cable connected to the switch is connected to the OUT end) and check whether the
service module indicator is normal.
(5) Use a nylon cable tie to bundle the power cords.
