Raymarine Radar Scanner - Manual (Page 42)

34 Pathfinder Radar Scanners
2.3 System connections
DC power connection
Power is supplied to the scanner via the display unit; the power cable
is supplied with the display unit, refer to your display unit Owner’s
Handbook for details on connecting power. However, you should be
aware of the following.
The DC system should be either:
• Negative grounded, with the negative battery terminal connected
to the ship’s ground.
• Floating, with neither battery terminal connected to the ship’s
ground.
CAUTION:
This radar is not intended for use on “positive” ground vessels.
The power cable Earth screen connections must be connected to
the ship’s ground.
Grounding the radar system
It is important that an effective RF ground is connected to the radar
system. You must ground the radar by connecting the drain wire
(screen) of the Power/NMEA Input cable to the nearest ground point
of the ship’s RF ground system. Refer to your display unit Owner’s
Handbook for details.
Note: Use only this ground connection.
Power Connections
The power connection to the radar should be made at either the output
of the battery isolator switch, or at a DC power distribution panel.
Raytheon recommends that power is fed directly to the radar via its
own dedicated cable system and MUST be protected by a thermal
circuit breaker or fuse, fitted close to the power connection. Refer to
the table below for isolator switch, circuit breaker or fuse value
ratings. Check all terminal connections are clean.
154_4.book Page 34 Wednesday, October 25, 2000 3:02 PM