To Ground The Acu; To Ground The Adu - Furuno FV-110GX Operator's Manual

Alternative ground for steel hulls
3. Establish the ground connection either at the hull (recommended) or at a dedicated RF
ground if available (alternative).
Important
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

Note
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
The ADU must be electrically isolated at its mounting bolts
Note
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.
A-4
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).
For optimum grounding use the mounting bolt located closest
to the ADU cable plate, see To ground the ADU on page 2-25.
2
) for this purpose.