Furuno FELCOM251, Руководство по установке

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4. GROUNDING AND RF PROTECTION
4-7
4.5 Alternative Grounding for Steel 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.
4.5.1 Grounding the Communication Unit
The Communication Unit must be grounded to the ship with the short antenna cable
and optional grounding kit (S-67-127570). Further, the Communication Unit must be
grounded at its grounding stud in order to ensure a proper grounding if the short an-
tenna cable is disconnected.
The ground connection can be established either at the hull (recommended) or at a
dedicated RF ground if available (alternative). However, bear in mind that the antenna
ground connection is to be made at the
same electrical ground potential as the
Communication Unit (see section 4.5.2).
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.