Raymarine L470 instruction manual Installation, DC Power Connections, RF ground

DC 12V connector to battery

T/D connector to transducer

RED

BLACK

RF ground

Fig. 2-17

DC Power Connections

terminal (+), and the black wire to the negative terminal (-). The negative terminal may also be called “ground” or “earth.” (The display unit is internally protected if you accidentally reverse the polarity of the power wires.)

4.Attach the red or positive wire to a 5 amp circuit breaker. If the unit is connected directly to the boat’s battery, include a 2 amp in-line fuse. (In-line fuses are available at most marine supply stores.)

5.The power cable includes a smaller “shield” wire. Connect this to a good ground.

6.If you need to extend the power wiring by more than 10 feet, use a larger wire size. This will allow the wires to deliver the correct voltage in spite of the longer wire distance. For runs of 20 to 35 feet, use #14 AWG.

If you extend the power wiring, be sure all electrical connections are solid and durable. Soldering is the best way to make these connec- tions. Insulate all connections using heat-shrink tubing or electrical tape. You may also use crimp connectors or a terminal strip, but be sure to use good-quality marine-grade parts.

7.At the rear of the display unit, plug in the power cable using the keyed connector.

Installation 23