Raymarine RAYCHART 420D - Manual (Page 81)

5-8 RayChart 420/420D Chartplotter
GPS Function GPS Function GPS Function GPS Function GPS Function Color Color Color Color Color
+12V dc Red
0V dc Black
Ground I/O White
Data in from GPS Green
Data out to GPS Yellow
POWER/NMEA connector
CAUTION:
If you do not have a breaker in your power circuit, you must fit an in-line
1A quick-blow fuse to the positive (red) lead of the power cable.
This unit is not intended for use on positive ground vessels.
The power connections should be made at a dc power distribution panel
through an isolator switch, a 1A circuit breaker or a 1A quick blow fuse. Check
that all connections are clean and tight.
The dc power system should be either:
• Negative ground, with the negative battery terminal connected to the vessel’s
ground.
• Floating, with neither battery terminal connected to the vessel’s ground.
The chartplotter is intended for use on vessels’ dc power systems operating in
the range 10.0Vdc to 18.0Vdc (ie. 12V systems, not 24V or 32V systems). A
1.5m (5ft) power cable is supplied .
If a longer power cable run is required, use the supplied power cable to connect
to the unit, then use a suitable connector block to connect the free end to the
extension cable. The supplied power cable has a cross-section of 2.0mm
2 .
Longer power cable runs may require larger wire gauges to minimise any
voltage drop in the cable. In order to determine the correct supply cable size if
the power cable must be extended, estimate the length of cable between the
vessel’s main power source and the connector block then select the wire size
indicated by the distance in the following table.
Maximum Extension Power Cable Lengths (m)
Power Cable Core mm 2 : 1.5 2.0 2.5 4.0 6.0 10.0
AWG: 16 15 14 12 10 8
Maximum extension (m) 11.0 15.0 20.0 30.0 45.0 70.0