Power connection
The power for the sonar module is provided directly by a 12 V dc or 24 V dc power source.
PowerConnectionsConnectionsPower
The sonar module is supplied with a power cable which contains bare stripped wires, suitable for direct connection to a 12 V or 24 V power supply:

RVM1600.
1.5 m (4.9 ft) Power cable (supplied).
Red wire (positive) — connects to the power supply’s positive terminal.
Waterproof fuse holder containing a suitably-rated inline fuse (not supplied), which must be fitted to the red positive wire — refer to the fuse ratings below.
Gray wire (drain) — connects to the vessel RF ground (if available), or the negative battery terminal.
Black wire (negative) — connects to the power supply’s negative terminal.