Garmin GPSMAP 8000 Series Installation Instructions Manual page 8

Item Description
NMEA 0183-compliant device
NMEA 0183 cable
Item
• If the NMEA 0183-compliant device has only one input (RX) wire (no A, B, +, or -), leave the pink wire unconnected.
• If the NMEA 0183-compliant device has only one output (TX) wire (no A, B, +, or -), connect the orange/white wire to ground.
• Consult the installation instructions of your NMEA 0183-compliant device to identify the output A(+) and B(-) wires and input A(+)
and B(-) wires.
• Use 28 AWG, shielded, twisted-pair wiring for extended runs of wire.
• Solder all connections and seal them with heat-shrink tubing.
Advanced NMEA 0183 Connections
There are four internal NMEA 0183 input ports (RX ports), and two internal NMEA 0183 output (TX ports) on the included NMEA
0183 data cable. You can connect one NMEA 0183 device per internal RX port to input data to your Garmin device, and you can
connect up to three NMEA 0183 devices in parallel to each internal TX port to receive data output by your Garmin device. Each
internal RX and TX port has 2 wires, labeled A (+) and B (-) according to the NMEA 0183 convention. The corresponding A (+) and
B (-) wires of each internal port should be connected to the A (+) and B (-) wires of your NMEA 0183-compliant device. Refer to the
table and wiring diagrams when connecting the data cable to NMEA 0183 devices.
Consult the installation instructions for your NMEA 0183-compliant device to identify the output (TX) A (+) and B (-) wires and input
(RX) A (+) and B (-) wires. Use 28 AWG, shielded, twisted-pair wiring for extended runs of wire. Solder all connections and seal
them with heat-shrink tubing.
• For two-way communication with a NMEA 0183 device, the internal ports on the NMEA 0183 data cable are not linked. For
example, if the input of the NMEA-compliant device is connected to the internal output port 1 on the data cable, you can connect
the output port of your NMEA 0183-compliant device to any of the internal input ports (port 1, port 2, port 3, or port 4) on the
wiring harness.
• The ground wires on the NMEA 0183 data cable and your NMEA 0183-compliant device must both be connected to ground.
• See Specifications, page 13
• The internal NMEA 0183 ports and communication protocols are configured on the connected Garmin device. See the NMEA
0183 section or communication configuration section of the owner's manual provided with your Garmin device for more
information.
Port
Input port 1
Input port 2
Input port 3
8
Garmin Wire Function
Power
Power ground
Data ground
Receive B (-)
Receive A (+)
Transmit A (+)
Transmit B (-)
for a list of the approved NMEA 0183 sentences output by and input to your device.
Wire Function
RX/A (+)
RX/B (-)
RX/A (+)
RX/B (-)
RX/A (+)
RX/B (-)
Garmin Wire Color
Red
Black
Black
Orange/white
White
Gray
Pink
Wire Color
White
Orange/white
Brown
Brown/white
Violet
Violet/white
GPSMAP 8000 Series Installation Instructions
NMEA 0183 Device Wire Function
Power
Power ground
Data ground
N/A
Transmit
Receive
N/A
Pin Number