Lightning Protection
The Alloy receiver needs the following parts and areas to be grounded to prevent, or limit, the damage sustained from electrical surges and lightning strikes:
Trimble recommends installing lightning and surge protection equipment to protect GNSS receivers on all permanent sites as follows:
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Install lightning protection for the GNSS antenna coaxial input. Trimble recommends P/N 187642 - Polyphaser DGXZ + 15NFNF-A. The SURGE side of the lightning suppressor must be connected to the cable going to the GNSS antenna. The EQUIPMENT-PROTECTION side connector must be connected to the GNSS receiver.
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Connect the Polyphaser body to earth ground per the Polyphaser installation instructions.
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To protect the Ethernet port from power surges and RF noise, ensure that you use a Shielded RJ45 cable:
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The Alloy chassis needs to be grounded. The recommended grounding method is by connecting a grounded wire to a mounting screw and mounting rail. The receiver requires a ring terminal with a 14-AWG copper wire to secure to the primary ground, as shown:
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Trimble recommends installing a surge suppressor for the power line. If powering the Alloy receiver by DC voltage, the DC input requires additional surge protection input of 24 V DC (+/-).