Power Supply Wiring Diagram
2.6POWER SUPPLY WIRING DIAGRAM
We recommended the installation of a switch and a (5A) fuse in the positive DC supply to the MF 2500 Fish Finder. The MF 2500 Fish Finder is active sending the digital depth through the NMEA interface even when the power (chartplotter) is turned off, thus the need for a switch.
In the example below you will notice the positive DC power connection is run through a switch and a fuse before connecting it to the MF 2500 Fish Finder and the chartplotter.
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Owner's Manual