Raymarine L470 instruction manual Making the DC Power Connections, Installation

2.Plug the cable from the depth-only transducer into the receptacle connector on the optional speed- and temperature-only transducer. The speed- and temperature-only transducer then connects at the transducer receptacle of the FishFinder L470. This is shown below in Fig. 2-16.

Sensor for	Sensor for
speed and	depth only
temperature

Fig. 2-16

Cable for Speed and Temperature Sensor

Making the DC Power Connections

1.The display unit is designed for use on boats with 12V DC power systems. (The unit can operate as long as the DC voltage is between 10.8 and 16V DC.) The display unit can be wired to a negative- ground system, or both the negative and positive supply lines may be “floating” above ground. This unit is not intended for use on boats with positive ground.

2.The 6-foot power cable supplied with the display unit should reach the source of DC power. On a small boat, connect the power leads directly to the main battery isolation switch or breaker. On a larger boat, route the power leads to the DC power distribution panel.

3.It is very important that you connect the power leads correctly. See Fig. 2-17. At the power source, connect the red wire to the positive

22 Installation