Chapter 2: Installation
23
Installation with Separate Speed and Temperature
Sensors
1. Optional depth-only and speed- and temperature-only transducers
are available for the L750 Fishfinder. In this optional configuration the
separate transducers are connected via a “Y” type receptacle cable
located on the optional speed- and temperature-only transducer
cable.
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 to the
“pigtail” which runs to the transducer connector of the L750
Fishfinder. This is shown at left in Fig. 2-17.
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 actual voltage is
between 10 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.
Fig. 2-16 Cable for Sidelooker Transducer
Fig. 2-17 Cable for Speed and
Temperature Sensor
Depth
transducer
Sidelooker
transducer
Sensor for
depth only
Sensor for
speed and
temperature
