Garmin Fishfinder 300 ML Installation Instructions Manual - page 7
7
Fishfinder 300C Installation Instructions
(Red) + Vdc
(Black) Ground
(Blue) NMEA 0183 OUT
(Yellow) Alarm Low
To transducer
RXD +
RXD -
dc power source
NMEA device
(optional)
Alarm relay (optional)
100 ma maximum coil current
Fishfinder 300C Wiring Diagram
Connecting to a NMEA device
You can connect the Fishfinder 300C to additional NMEA 0183-compatible electronic equipment, such as a Garmin GPS (Global Positioning
System) device. If equipped with a capable transducer, the Fishfinder 300C can send depth, temperature, and speed information. Refer to the
Fishfinder 300C wiring diagram for connecting the Fishfinder 300C to NMEA 0183-compatible devices.
To install the wiring harness to a GPS or other NMEA 0183 device:
1. Followtheinstructionsin
Step 4: Install the Wiring Harnesson
.ForGarminunits,theground(black)wiresserveasNMEA
groundandmustbeattachedtogetheroronthesameterminal.RefertothewiringdiagramofyourGPSorNMEA0183deviceforwire
identification.
2. Connecttheblue(NMEA0183-OUT)wirefromtheFishfinder300CtotheNMEA0183-INwireonthewiringharnessoftheotherNMEA
0183device.
3. TurnontheFishfinder300C
NMEA Outputsetting.(FromtheHomescreen,select
Configure
>
System
>
NMEA Output
>
On
.)
4. ConfiguretheotherNMEA0183deviceaccordingtothemanufacturer'sinstructions.
Interfacing with NMEA
The Fishfinder 300C allows for NMEA 0183 Version 3.01 output with a compatible GPS or navigation device. You must set NMEA Output to
On to send data.
The Fishfinder 300C sends the SDDBT, SDDPT, SDMTW, SDVHW, SDWPL sentences in NMEA 0183 Version 3.01 output.