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2.0 communication port. Com port one (Com-1) can be used to receive
NMEA format GPS data. The com port can also transmit NMEA format
GPS data to another device.
The four wires for the com port are combined with the Power Supply
cable and NMEA 2000 Power cable to form the power/data cable (shown
earlier). Com-1 uses the yellow wire to transmit, the orange wire to re-
ceive and the shield wire for signal ground. Your unit does not use the
blue wire.
Com-1 wiring to receive NMEA position information
from some other GPS receiver.
Com-1 wiring to transmit NMEA position information
to another NMEA-compatible device.
Ground
To Other
Device
Com-1
To unit
Yellow (Transmit)
NMEA Receive
Shield (Ground)
Orange (Receive)
NMEA Transmit
Shield (Ground)
Ground
Com-1
To unit
To Other
GPS Receiver