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.

Connector

 

Pin Number

Port Function

Wire Color

 

 

1

RX port 1, A (+)

White

 

 

2

RX port 1, B (-)

Orange/white

 

 

5

RX port 2, A (+)

Brown

 

 

6

RX port 2, B (-)

Brown/white

 

 

9

RX port 3, A (+)

Violet

 

 

10

RX port 3, B (-)

violet/white

Pin 1

Pin 3

11

RX port 4, A (+)

black/white

 

 

12

rX port 4, B (-)

red/white

Pin 8

 

3

tX port 1, A (+)

gray

 

4

tX port 1, B (-)

pink

 

 

 

 

7

tX port 2, A (+)

Blue

Pin 17

 

8

tX port 2, B (-)

blue/white

NMEA 0183 Cable

 

13

GPS 17 in

Green/white

End View

 

14

GPS 17 out

Green

 

 

 

 

15

spare

 

 

 

16

Alarm

Yellow

 

 

17

Accessory on

Orange

 

 

18

Ground

Black

 

 

19

spare

 

10

GPSMAP 4000/5000 Series Installation Instructions