Lowrance electronic Lowrance LMS-522c iGPS - Manual (Page 44)

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WARNING:
The NMEA 2000 network bus is always on and constantly
drawing power. You must connect NMEA power to a
switched power source so you can turn off the network
when not in use. Failure to connect to and use a power
switch will drain your boat battery, which could stop
your boat's operation.
Connecting to a NMEA 2000 Network
Your unit can be connected to a NMEA 2000 bus, receiving sensor in-
formation from units and devices attached to the network. Contact LEI
Extras (look inside back cover for accessory ordering information) for
NMEA 2000 accessories.
NOTE:
GPS data from your internal GPS receiver can not be transmitted
across a NMEA 2000 network. The only way to transmit GPS data
across the network is to add a LGC module to the network. For
more information see page 203.
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.
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 receive 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