Connecting the Wiring Harness to a NMEA 0183 Device
You can connect the GPSMAP device to other NMEA compatible equipment, such as a DSC or AIS device. Refer to the wiring diagram for connecting the chartplotter to NMEA
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Wire function
Power
Power ground
NMEA Ground
NMEA Rx/A (+)
NMEA Tx/A (+)
NMEA 0183
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Wiring a GPSMAP 400/500 Series Chartplotter to a Standard NMEA 0183 Device
To connect the wiring harness to a NMEA 0183 device:
1.For Garmin devices, the ground (black) wires serve as NMEA 0183 ground and must be attached together or on the same terminal as the NMEA 0183 ground on your NMEA 0183 device. Refer to the wiring diagram of your NMEA 0183 device for wire identification.
2.Connect the blue (NMEA 0183 port 1 out) wire from the GPSMAP 400/500 wiring harness to the NMEA 0183 in (or Rx/A +) wire on the wiring harness of the NMEA 0183 device, and the brown (NMEA 0183 port 1 in) wire to the NMEA out (or Tx/A +) wire on the wiring harness of the NMEA 0183 device.
3.Repeat step 2 using the grey and violet wires for an additional NMEA 0183 device.
4.Set the serial port(s) on the chartplotter to use NMEA 0183 data (standard or high speed). See the GPSMAP 400/500 Series Owner’s Manual for more information.
Connecting the Wiring Harness to an Optional Horn, Lamp, or Both
The GPSMAP 400/500 series chartplotter can be used with a lamp, a horn, or both, to sound or flash an alert when the chartplotter displays a message. The alarm does not need to be wired for the GPSMAP 400/500 chartplotter to function. The alarm circuit switches to a
GPSMAP 400/500 series chartplotter
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Horn Lamp
Relay
Yellow (alarm) 100 ma max coil current
Wiring a GPSMAP 400/500 Series Chartplotter to a Horn, a Lamp, or Both
*Certain GPSMAP 400/500 series chartplotters can be connected to
GPSMAP 400/500 Series Installation Instructions | 7 |