Lowrance electronic Lowrance GlobalMap 7200C - Manual (Page 18)

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You need to select an antenna installation location that has a clear, un-
obstructed view of the sky. After the module is installed, connect it to the
unit. The LGC-3000 can communicate with your GPS unit either directly
(using the supplied extension cable) or through a NMEA 2000
® network.
NOTE:
See the module’s instruction sheet, publication part number 988-
0154-651, for complete installation instructions.
In an automobile, you may achieve good results by simply placing the
external antenna on the top of the dash, at the base of the windshield. A
piece of the rubber non-skid shelf liner material available in recreational
vehicle supply stores will help hold the antenna in place. This may not
work well if you have a cab-over design pickup truck camper or motor
home. If dashboard reception is poor, simply relocate the antenna module
elsewhere on the vehicle for a clearer view of the sky.
Power Connections
Your unit comes with a power/data cable that splits into three branches,
each with several exposed wires.
The thicker two-wire cable (red and black) is the power supply for your
display unit. This cable has no label.
The branch with three wires (red, black and shield) is the power cable for
a NMEA 2000 network. It is labeled "NMEA 2000 POWER."
The branch with 5 wires (blue, yellow, orange, green and shield) is a data
cable, labeled "RS-232 COMM." It supports two serial communication
ports. These allow your unit to exchange NMEA 0183 data with another
device, such as an autopilot, DSC marine radio or computer.
The Power/Data cable for this unit.
To unit
Display unit power wires:
red and black
NMEA 2000 power wires:
red, black and shield
Data cable wires: blue,
yellow, orange, green
and shield