I am trying to connect a Magellan
Nav 6500 chartplotter
to a new Icom
504 VHF radio
. I have a few questions:
1)On the Icom radio
, the NMEA
input is one wire with the inner part being NMEA+ and the outer shield labelled NMEA-. How do I connect two normal wires to this? Is there some kind of adaptor? Or do I just try to roll back the shield and twist it into a wire?
2)The Magellan chartplotter
has an NMEA+ output but no NMEA- output. The Magellan manual advises just connecting NMEA- to the black wire which also is the 12V negative wire. Can I just connect the VHF's NMEA
input (-) to the negative terminal on the breaker panel (would actually be a different subpanel) rather than connecting it to the Magellan's black wire? That seems equivalent.
I'm worried about breaking my expensive new radio and so wanted to make sure I was doing this correctly.