Power Diagram A - Lowrance LCX-112C Operation Instructions Manual

If a malfunction happens inside the unit, extensive damage can
occur if the enclosed fuse is not used. As with all electrical devices,
this unit could be damaged to a point that it is irreparable and
could even cause harm to the user when not properly fused.
Failure to use a 3-amp fuse will void your warranty.
If possible, keep the power cable away from other boat wiring, especially
the engine's wires. This will provide the best isolation from electrical
noise. If the cable is not long enough, splice #18 gauge wire onto it.
The display power cable has two wires, red and black. Red is the positive
(+) lead, black is negative (–) or ground. Make sure to attach the in-line
fuse holder to the red lead as close to the power source as possible.
For example, if you have to extend the power cable to the power bus or
battery, attach one end of the fuse holder directly to the power bus or
battery. This will protect both the unit and the power cable in the event
of a short.
This unit has reverse polarity protection. No damage will occur if the
power wires are reversed. However, the unit will not work until the
wires are attached correctly.
To unit
Display Unit
Power Cable
Data Cable
Use this method if you are powering the display unit and a GPS
module or the display unit and a NMEA 2000 network.

Power Diagram A

NMEA 2000
Power Cable
3-amp fuse
Recommended
display unit
power-off switch
Mandatory
network
power-off
switch
Shield
29
3-amp fuse
Black
Red
Black
12 volt DC
power source