Chapter 1: DSM300 Installation 17
Transducer Connection
A 30 ft (10m) cable is supplied with the transducer. For details see “Transducer
Cable” on page 26. The connector pins are shown in the following diagram,
together with the connections and wire colors; this is information is provided as
an aid to fault diagnosis.
Ground Connection
It is important that an effective RF ground is connected to the system. A single
ground point should be used for all equipment. You can ground the DSM300 by
connecting the drain wire (shield) of the Power Input cable to the boat’s RF
ground. If you need to extend the wire, the extension wire should be an 8 mm
braid or AWG 10 multi-stranded cable.
If your boat has a dedicated ground strap available, you can alternatively attach it
to the ground wing nut on the rear panel of the module. If your boat does not have
an RF system, connect the drain wire to the negative battery terminal.
The DC system should be either:
• Negative grounded, with the negative battery terminal connected to the
boat’s ground.
• Floating, with neither battery terminal connected to the boat’s ground.
Figure 1-7: DSM300 Transducer Connector
Pin No Function Color Pin No Function Color
1 Speed Red 5 Speed/Temp Ground Brown
2TempWhite 6+ Depth Blue
3ShieldDrain 7– Depth Black
4 Sense Green
5
1
2
3
4
7
6
D4850-2
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