Wiring Additional NMEA 0183 Devices
The NMEA 0183 data cable included with the GPSMAP 4000/5000 series chartplotter supports the NMEA 0183 standard, which is used to wire
various NMEA 0183-compliant devices, such as VHF radios, NMEA instruments, autopilots, or a computer.
The GPSMAP 4000/5000 series unit 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 unit, wire up to three NMEA 0183 devices in parallel to
each TX port to receive data from a 4000/5000 series unit.
Each RX and TX port has 2 wires, labeled A (+) and B (-) per 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
unit 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 the
connection with heat shrink tubing.
Notes:
• For 2-way communication with a NMEA 0183 device, the ports on the GPSMAP 4000/5000 units are not linked. For example, if the RX
port of the NMEA-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 unit 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.
• This unit also includes support for the WPL sentence, DSC, and sonar NMEA 0183 input with support for the DPT (depth) or DBT, MTW
(water temp), and VHW (water temp, speed, and heading) sentences.
• Use the Communications section of the Configure menu on the GPSMAP 4000/5000 series unit to set up NMEA 0183 communications.
See the owner's manual for details.
PIN 1
PIN 1
PIN 8
PIN 8
PIN 17
PIN 17
NMEA 0183 Cable
NMEA 0183 Cable
0
Connector
Pin Number
PIN 3
PIN 3
End View
End View
Port Function
1
RX PORT 1, A (+)
2
RX PORT 1, B (-)
5
RX PORT 2, A (+)
6
RX PORT 2, B (-)
9
RX PORT 3, A (+)
10
RX PORT 3, B (-)
11
RX PORT 4, A (+)
12
RX PORT 4, B (-)
3
TX PORT 1, A (+)
4
TX PORT 1, B (-)
7
TX PORT 2, A (+)
8
TX PORT 2, B (-)
13
GPS 17 IN
14
GPS 17 OUT
15
SPARE
16
ALARM
17
ACCESSORy ON
18
GROUND
19
SPARE
Wire Color
WHITE
ORANGE/WHITE
BROWN
BROWN/WHITE
VIOLET
VIOLET/WHITE
BLACK/WHITE
RED/WHITE
GRAy
PINK
BLUE
BLUE/WHITE
GREEN/WHITE
GREEN
yELLOW
ORANGE
BLACK
GPSMAP 4000/5000 Series Installation Instructions
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