Chapter 2: Installation
17
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/NMEA connector provides for 12VDC power connection
and NMEA inputs/outputs using the supplied cable.
The chartplotter is intended for use on vessel’s DC power systems
operating in the range 10.0VDC to 18.0VDC (in other words, 12V
systems, not 24V or 32V systems).
Power connections should be made at a DC power distribution panel
through an isolator switch and a 1A circuit breaker or 1A quick blow fuse.
All connections must be 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
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 plus a
suitable connector block to connect to the extension cable. The supplied
power cable cores have a cross-section of 2.0mm
2
(15 AWG).
Longer power cable runs may require larger wire gauges to minimize any
voltage drop in the cable.
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
correct wire size determined by the distance as indicated below.
The DC power and NMEA inputs/outputs should be connected to the
POWER/NMEA
cable at the rear of the chartplotter. The cable colors are
detailed below.
Wire size AWG:
16
15
14
12
10
8
Wire size in mm
2
:
1.5
2.0
2.5
4.0
6.0
10.0
Maximum Extension (feet):
36
49
65
98
147
230
Maximum Extension (meters):
11.0
15.0
20.0
30.0
45.0
70.0
