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2
INSTALLATION continued
2.4
Grounding
It is important that an effective RF ground is connected to the display. You must ground the display
by connecting the drain (earth) terminal directly on the Nauticomp power supply to the nearest RF
ground source (superstructure). The length should be as short as possible.
CAUTION:
This Display is not intended for use on ''Positive' ground circuits. The power input cable Earth screen
connections must be connected directly to a RF ground source.
2.5
DC Power Connections
The power connection to the Nauticomp Power Supply should be made at either the output of the
battery isolator switch, or at a DC power distribution panel. Nauticomp recommends that power be
fed directly to the Nauticomp Power Supply via its own dedicated cable system. An in-line fuse is
required to be installed on the positive (+) feed going to the Nauticomp provided power supply.
See table below for reference:-
Vessel Power Source
12 V DC
24V DC
2.6
Extending the Power Cable
Longer power cable runs may require larger wire gauges to minimize any voltage drop in the cable.
Ensure that the minimum voltage specification of the display is met at the junction of these cables
when the Display is operating at full brightness. If a longer power cable run is required, use the
supplied power cable to connect to the display unit. Then use a suitable connector block to connect
the free end to the extension cable; take particular care to ensure correct polarity and grounding of
the screening braid to an RF ground source. The supplied 3 meter power cable (Part # 23-LTWPOW)
has a cross-section of 16 AWG.
Rating of Fuse
10 Amp
5 Amp
Page 7 of 30
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