Alternative Grounding For Aluminium Hulls - Furuno Inmarsat FleetBroadband FELCOM251 Installation Manual

4.6

Alternative Grounding for Aluminium Hulls

The following guidelines assume a two-wire, isolated grounding arrangement; that is
no part of the circuit, in particular the battery negative, is connected to any ground po-
tential or equipment.
4.6.1 Grounding the Communication Unit
The Communication Unit must be grounded with the short antenna cable and optional
grounding kit (S-67-127570). Further, the Communication Unit must be grounded at
its grounding stud to ensure a proper grounding if the short antenna cable is discon-
nected.
The ground connection must be established at a dedicated RF ground (either capac-
itively or electrically coupled). Remember to make the antenna ground connection at
the same electrical ground potential as the Communication Unit (see section 4.7.2).
The Communication Unit provides galvanic isolation (as required) from its input power
terminals to the chassis/grounding stud. This way the isolated grounding arrangement
is maintained.
4. GROUNDING AND RF PROTECTION
4-9