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the telephone wiring in a house. If you pick up a phone in your living room,
you can hear someone talking into the phone in the bedroom.
Lowrance and LEI provide all the cables you will need to create a NMEA
2000 network. Lowrance provides T connectors and extension cables so
you can add devices along the backbone wherever you want. Once you
have a working network, every sensor added will come with its own T
connector for easy expansion.
The simplest NMEA 2000 network is a GPS or sonar/GPS display unit
with the LGC-3000, one double-T connector, two 120 ohm terminators
and any extension cables needed to connect them.
It is easy to expand this network by removing a terminator from one end
of the double T connector, then inserting a new T connector or extension
cable between the double T connector and terminator (See the NMEA
200 network general information document that came with your unit for
more information). For more information on connecting your unit to an
existing NMEA 2000 network, see the NMEA 2000 Networks General In-
formation document that was packed with your unit, publication part
number 988-0154-173.
NMEA 0183 Wiring
(Data cable)
To exchange NMEA 0183 data, this unit has one NMEA 0183 version
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.
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.
The four wires for the com port are combined with the display unit
power 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 receive and the shield wire for signal ground. Your unit does
not use the blue wire.
Ground
To Other
Device
Com-1
To unit
Y
ellow (Transmit)
NMEA Receive
Shield (Ground)
Orange (Receive)
NMEA Transmit
Shield (Ground)
Ground
Com-1
To unit
To Other
GPS Receiver