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Figure 27: Full Lighting Protection Set-up Diagram
Outdoor Surge Protection System
Antenna Grounding
RAKwireless recommends a lightning arrestor to be installed on all the antenna N-Type terminals (LoRa, LTE,
Wi-Fi and GPS). It is recommended to use a 10-AWG or better grounding wire to connect the arrestor to the
tower mounted LoRa antenna. The arrestors have to be Female to Male type in order to fit the antenna and
housing connectors. Make sure you use a 10 AWG or better wire to connect the screw terminals of the arrestors to
the grounding rail mounted on the building wall (grounding bar in case of field deployment as in the picture).
Gateway Grounding
Additionally, it is recommended to use another 10 AWG or better grounding wire to connect the screw terminal on
the bottom right side of the Gateway casing to the grounding rail (bar).
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NOTE
No additional protection for the Ethernet cabling is required at the Gateway side. There is a surge
protection system built-in (GDT + Anti-surge resistor).
Indoor Surge Protection
For the purpose of protecting the indoor equipment and circuitry connected to the Gateway you need to install an
Ethernet port SPD lightning arrester. It should be positioned along the cabling connecting the Gateway to the
PoE injector. Make sure you connect its grounding wire terminal to an appropriate building grounding point. Thus
your PoE injector and network switch/router should be surge protected. Please refer to the images in the diagram
below for the Outdoor and Indoor portion of the surge protection system. Should you fail to adhere to the
recommendations in this document RAKwireless carries no responsibility for any damage your equipment incurs
due to lightning strike!
Recommended Equipment
