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GPSMAP 4000/5000 Series Installation Instructions
Advanced nMEA 0183 Wiring
The GPSMAP 4000/5000 series chartplotter features four ports to receive NMEA 0183 data (RX ports), and two ports to send NMEA 0183 data
(TX ports). Wire one NMEA 0183 device per RX port to send data to a 4000/5000 series chartplotter. Wire up to three NMEA 0183 devices in
parallel to each TX port to receive data from a 4000/5000 series chartplotter.
Each RX and TX port has 2 wires, labeled A (+) and B (-) according to the NMEA 0183 convention. Connect the corresponding A (+) and B (-)
wires of each port to the A (+) and B (-) wires of your NMEA 0183-compliant device. Refer to the table and wiring diagrams when wiring the
4000/5000 chartplotter to NMEA 0183 devices.
Consult the installation instructions of your NMEA 0183-compliant device to identify the Transfer (TX) A(+) and B(-) wires and
Receiving (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.
notes:
• For two-way communication with a NMEA 0183 device, the ports on the GPSMAP 4000/5000 chartplotters are not linked. For example,
if the RX port of the NMEA 0183-compliant device is wired to TX port 1 on the GPSMAP 4000/5000, you can wire the TX port of your
NMEA 0183-compliant device to RX port 1, port 2, port 3, or port 4 on the GPSMAP 4000/5000.
• The ground wires on the NMEA 0183 data cable from the GPSMAP 4000/5000 series chartplotter and your NMEA 0183-compliant device
must both be grounded.
• Approved NMEA 0183 sentences—GPBWC, GPRMC, GPGGA, GPGSA, GPGSV, GPGLL, GPBOD, GPRMB, GPRTE, GPVTG,
GPWPL, GPXTE, and Garmin proprietary sentences —PGRME, PGRMM, and PGRMZ.
• The GPSMAP 4000/5000 series chartplotter also includes support for the WPL sentence, DSC, and sonar NMEA 0183 input with support for
the DPT (depth) or DBT, MTW (water temperature), and VHW (water temperature, speed, and heading) sentences.
• Use the Communications section of the Configure menu on the GPSMAP 4000/5000 series chartplotter to set up NMEA 0183
communications. See the owner’s manual for details.
Port
Wire Function
Wire Color
Pin number
Connector
Receiving Port 1
RX / A (+)
White
1
RX / B (-)
Orange/White
2
Receiving Port 2
RX / A (+)
Brown
5
RX / B (-)
Brown/White
6
Receiving Port 3
RX / A (+)
Violet
9
RX / B (-)
Violet/White
10
Receiving Port 4
RX / A (+)
Black/White
11
rX / B (-)
Red/White
12
Transmitting
Port 1
tX / A (+)
Gray
3
tX / B (-)
Pink
4
Transmitting
Port 2
tX / A (+)
Blue
7
tX / B (-)
Blue/White
8
N/A
GPS 17 in
Green/White
13
N/A
GPS 17 out
Green
14
N/A
spare
15
N/A
Alarm
Yellow
16
N/A
Accessory on
Orange
17
N/A
Ground
Black
18
N/a
spare
19
GPSMAP 4000/5000 Series nMEA 0183 Data Cable
NMEA 0183 Cable End
View
PIn 1
PIn 3
PIn 8
PIn 17
