Furuno FV-110GX, Руководство оператора

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Alternative ground for steel hulls
A-4
3. Establish the ground connection either at the hull (recommended) or at a dedicated RF
ground if available (alternative).
The ACU provides galvanic isolation (as required) from its input power terminals to the
chassis/grounding stud. This way the isolated grounding arrangement is maintained.
A.3.2 To ground the ADU
Terminal grounded at the hull (recommended)
In this case the ADU is grounded to the ship via one (or more) of its mounting bolts.
1. Make sure to remove painting, dirt, grease etc. at the mounting holes in order to make
good electrical contact to the hull.
2. Use serrated washers when securing the mounting bolts and seal the joint with
protective coating to avoid corrosion.
Terminal grounded at a dedicated RF ground (alternative)
In this case the ADU is grounded with a separate ground cable.
1. Route the ground cable parallel and close to the shielded coax cable connecting the
ADU to the ACU grounding kit.
2. You can use a heavy gauge wire with tinned strands (min. 6 mm
2
) for this purpose.
Important
However, bear in mind that the ADU ground
connection must be made at the
same electrical
ground potential as the ACU (see To ground the
ADU on page A-4).
Note
For optimum grounding use the mounting bolt located closest
to the ADU cable plate, see
To ground the ADU on page 2-25.
Note
The ADU must be electrically isolated at its mounting bolts
by means of shoulder bushings and washers ensuring the
isolated RF ground - see
Isolation of the ADU from the
mounting base on page A-10.