Seiwa Black Box 1000W 50/200kHz - Manual (Page 31)

33 User Manual
4.6 POWER SUPPLY WIRING DIAGRAM
We recommended the installation of a switch and a (5A) fuse in the positive DC
supply to the BB 50/200. The BB 50/200 is active sending the digital depth through
the NMEA interface even when the power (chart plotter) 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 BB 50/200 and the chart
plotter.
Chart Plotter
F
+
-
12V DC
Battery
Switch
+
-
+ -
Fuse
Fig.4.6 - The BB 50/200 and the chart plotter could be turned Off
Chart Plotter
F
+
-
12V DC
Battery
+
-
+ -
Fuse
Switch
Fig.4.6a - The BB 50/200 could be turned Off without turning Off the chart plotter