Furuno FV-110, Operator'S Manual

Page: 196 / 240

Alternative grounding for steel hulls
F-4
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.
F.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. Make
sure to remove painting, dirt, grease etc. at the mounting holes in order to make good
electrical contact to the hull. 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. The ground cable must be
routed parallel and close to the shielded coax cable connecting the ADU to the ACU
grounding kit. A heavy gauge wire with tinned strands (min. 6 mm
2
) can be used for this
purpose.
Note
For optimum grounding use the mounting bolt located closest to the ADU cable
plate, see
To ground the ADU on page 2-24.
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 F-8.
Figure F-3: Grounding at a dedicated RF ground (alternative)
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