Chapter 3: Installation 51
3.6 How do I make the electrical connections?
You should use the combined Power/Hailer/NMEA cable to make the electrical
connections. This cable contains four wire pairs for connection to Direct Current
(DC) power, National Marine Electronics Association (NMEA) input, and the
Hailer/Horn speaker. The connections are:
Raymarine recommend that unused connections have the tinned ends removed
and the tails are taped back to the main cable sheath.
For optimal installation, use screened cables throughout, ensuring that the screen
connection is continuous and terminates at the boat’s earth.
The Ray240 base transceiver does not have an ON/OFF switch. It is therefore
strongly recommended that your radio is connected to the boat’s power supply
through a dedicated power breaker to avoid unnecessary drain on the electrical
system when your boat is not in use.
To ensure that the unit works correctly:
• You should connect the power cable to the DC supply using lugs (not supplied)
that have been crimped and soldered.
• Use an antenna and mount that does not connect the co-axial cable outer to
the ships earth.
Cable color Connection
Red 12 Volt Positive
Black 12 Volt Negative
Yellow Hailer +
Green Hailer -
Black Not used
White NMEA In +
Blue NMEA In -
Brown NMEA Out +
Orange NMEA Out -
Black Not used
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