Garmin Fishfinder 250 Owner's Manual

Also see for Fishfinder 250: Owner's manual Template manual

Garmin Fishfinder 250 Owner's Manual Manual pdf 13 page image

5To 10-35 Volt Boat Supply2A-+Boat GroundBlack WireRed WireInstall 2-AmpFuseTo Fishfi nder 250/250CInstallationConnecting the Power/Data CableThe power/data cable connects the Fishfinder 250/250C to a 10-35 volt DC system and providesinterface capabilities for connecting external devices. The color code in the diagram (pg. 6) indicates theappropriate harness connections. If it is necessary to extend the power/data wires, use a wire of comparablesize and keep your extension as short as possible.The unit can be wired directly to your boat’s battery or to an unused holder on your boat’s fuse block.When connecting the unit directly to the battery, make sure the 2-Amp in-line fuse supplied with the unit isinstalled . If needed, use an ACG/3AG - 2 Amp replacement fuse. If you decide to use the fuse block, removethe in-line fuse holder supplied with the unit.Installing the Wiring Harness (Basic):1. Determine the polarity of the fuse holder using a Test Light or Volt Meter.2. Install the Red (+) wire on the Positive Fuse Holder Terminal.3. Install the Black (-) wire on the Negative Fuse Holder Terminal.4. Install a 2 amp fuse in the Fuse Holder.The Fishfinder 250/250C can be connected to another piece of NMEA compatible electronic equipment,such as a Garmin GPS (Global Positioning System). If equipped with a capable transducer, the Fishfinder250/250C can send depth, temperature, and speed information to the NMEA device. It can also mark alocation (pg. 15) that could be displayed on another device and can accept GPS navigational data (pg. 17),such as position, time, course, distance, etc. Refer to the wiring diagram on the following page for interfac-ing the Fishfinder 250/250C with other devices.Installing the Wiring Harness to a GPS or other NMEA device:1. Follow steps 1-4 of the above wiring harness installation. For Garmin units, the Ground (black) wiresfrom both devices must be attached together or on the same fuse terminal for data ground. Refer to thewiring diagram of your GPS unit for wire identification.2. Connect the Blue (Data Out) wire from the Fishfinder to the Data IN wire on the GPS/NMEA harness.3. Connect the Brown (Data In) wire from the Fishfinder to the Data OUT wire on the GPS/NMEA harness.4. Set the Fishfinder 250/250C NMEA Input/Output to ‘On’ (pg. 20). For Garmin GPS units, set thecommunications interface to NMEA/NMEA, NMEA In/NMEA Out or NMEA.Wiring and Interfacing