wiring problems

[steve1952]

hi folks would be grateful for any help on a wiring problem. I am trying to connect a standard horizon vhf to a northstar chartplotter to display my position I have both manuals but still a bit confused the wiring for the vhf is as follows yellow nmea gps input +
green nmea gps input -
white nmea dsc output +
brown nmea dsc output-


wiring for the chartplotter black ground - power in, nmea ground
brown power out, 9 v dc not used
white nmea out
blue navbus -
red + power in, 10 to 16v dc
orange navbus +
yellow auto power in
green external alarm out, 30v dc200 ma maximum

I would be most grateful for any suggestions as I'm totally baffled regards steve

 

[PaulRainbow]

hi folks would be grateful for any help on a wiring problem. I am trying to connect a standard horizon vhf to a northstar chartplotter to display my position I have both manuals but still a bit confused the wiring for the vhf is as follows yellow nmea gps input +
green nmea gps input -
white nmea dsc output +
brown nmea dsc output-


wiring for the chartplotter black ground - power in, nmea ground
brown power out, 9 v dc not used
white nmea out
blue navbus -
red + power in, 10 to 16v dc
orange navbus +
yellow auto power in
green external alarm out, 30v dc200 ma maximum

I would be most grateful for any suggestions as I'm totally baffled regards steve

VHF Yellow to plotter White
VHF Green to plotter Black

 

[ShinyShoe]

Start by getting a position to display on the VHF.

I'd try connecting
VHF yellow to plotter white
VHF green to plotter black

Doesn't look like your plotter has an NMEA in so it wont show position of a DSC alert on screen, unless Navbus is able to handle it... not a term I've come across before.

There may be settings you need to set. You may also have issues with NMEA -ve and GND being used...

 

[RichardS]

VHF Yellow to plotter White
VHF Green to plotter Black

I don't understand why plotter white and black would be NMEA inputs. They sound like outputs but would a plotter be able to output NMEA without being able to accept an input.... unless it had built in GPS perhaps?

Richard

 

[PaulRainbow]

I don't understand why plotter white and black would be NMEA inputs. They sound like outputs but would a plotter be able to output NMEA without being able to accept an input.... unless it had built in GPS perhaps?

Richard

Black and white are NMEA outputs from the plotter, not inputs. GPS and NMEA inputs are on another cable.

 

[RichardS]

Black and white are NMEA outputs from the plotter, not inputs. GPS and NMEA inputs are on another cable.

In that case consider me totally confused.

I thought that the OP was trying to send data from the VHF to the chartplotter so he could display a position on the chartplotter which would require identification of the NMEA inputs on the plotter but it appears that I'm misinterpreting stuff.

Richard

 

[ShinyShoe]

In that case consider me totally confused.

I thought that the OP was trying to send data from the VHF to the chartplotter so he could display a position on the chartplotter which would require identification of the NMEA inputs on the plotter but it appears that I'm misinterpreting stuff.

Richard

More commonly people want to send their position to the Radio for the DSC function to work. I was making an assumption that the plotter did GPS too

Testing getting data from the radio to the plotter is hard without getting a friend to press the red button ;-) Hence start by getting the radio to show your position

 

[PaulRainbow]

In that case consider me totally confused.

I thought that the OP was trying to send data from the VHF to the chartplotter so he could display a position on the chartplotter which would require identification of the NMEA inputs on the plotter but it appears that I'm misinterpreting stuff.

Richard

He said "I am trying to connect a standard horizon vhf to a northstar chartplotter to display my position"

I took that to mean he wanted the GPS data from the plotter for DSC purposes.

Also worth remembering that pre-N2K, GPS antennas or receivers were connected in a variety of ways. They often had dedicated ports for the GPS, unusual to be connected to the power/data cable.

 

[PaulRainbow]

More commonly people want to send their position to the Radio for the DSC function to work. I was making an assumption that the plotter did GPS too

Testing getting data from the radio to the plotter is hard without getting a friend to press the red button ;-) Hence start by getting the radio to show your position

No need to press the red button, you can test by using position requests on most setups. Problem with NMEA 0183 networks is that the VHF would generally get the GPS data reliably, but the plotters often didn't respond to data from the VHF unless they were the same brand.

 

[ithet]

Regarding DSC info between chartplotter and VHF (not GPS data which is what the OP wants), I think it has been noted before that with Navman/Northstar this is only available via their NavBus (which of course is not available on the SH VHF).