Lantronix
SESPM1040-541-LT-xx Install Guide
33772 Rev. F
Page
24
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64
Surge Protection / Grounding and Bonding
Surge Protection
Security cameras can act as lightning rods, drawing the voltage through the copper cabling to the networking
equipment. If a lightning strike hits within a few hundred feet of a cable, it can produce thousands of volts and
several million watts. Without proper protection, this can seriously damage or destroy networking equipment.
In a networked video surveillance system, the IP-based cameras can run on a dedicated video network or
connect directly back to the data center or telecom room. On a dedicated video network, a high-voltage surge
can cause extensive damage to sensitive electronics (e.g., Ethernet switches, network servers, and storage
devices). The surge can cause serious damage to mission-critical equipment if the IP cameras are connected to
the main production network.
Each of the PoE port interfaces’ four data pairs, as well as the included combo port’s RJ-45 interface, are fused
and have gas discharge tubes and other solid state devices to meet the outdoor exposure requirements for
power faults and lightning protection required in the following standards. No other external protection devices
are required.
Meets Surge Protection as specified in GR-1089 CORE Issue 4
ITU-T K.21 6kV on AC Line
IEC61000-4-2 (ESD) & 4-4 (EFT)
IEC61000-4-5 Lightning
Grounding and Bonding
The SESPM1040-541-LT-xx has an internal grounding post. This post must be tied to earth ground as close to the
device as practical with an 18 gauge or better wire. This is required for safety and ESD protection circuits. This
should be done by a qualified installer. External exposed grounding connection points are typically prohibited in
outdoor equipment due to corrosion concerns.