Lightning Protection
Power lightning arrester and signal lightning arrester are used for lighting protection.
Power lightning arrester is used for limiting the voltage surge due to a lightning. If an 
outdoor AC power cord should be directly connected to the device, please use a power 
lightning arrester.
Note: Power lightning arrester is not provided with our product. If needed, please self 
purchase it.
Signal  lightning  arrester  is  used  to  protect  RJ45  ports  of  the  device  from  lightning. 
When cabling outdoors, please install a signal lightning arrester before connecting the 
cable to the device.
When  purchasing  or using  a  signal  lightning  arrester,  please  observe  the  following 
rules: 
The port rate of the signal lightning arrester should match the rate of the desired port 
 
■
on the device. If it is not matched, this signal lighting arrester will not work. Purchase 
a standard lightning arrester. 
Install  signal  lightning  arrester  near  the  protected  device  and  connect  it  to  the  
 
■
ground via a shorter ground cable. 
Lightning Arrester ConnectionFigure 3-4  
Note: Signal lightning arrester is not provided with our product. If needed, please self 
purchase it.