Connecting Standard Horizon GX1500E to Garmin Bare Wires

[sailingjupiter]

I have read a few posts in the archive about connecting the wires together for various GPS's and DSC radios but all appear to be different. Anone know a solution to mine.

Radio is connected to the power supply. Just a query on the NMEA connections.

I'm not too techy and don't understand the difference between a NMEA Input (+) and NMEA Input (-).

I have the following wires to connect -

On Radio-
Blue - NMEA Input (+)
Green - NMEA Input (-)
Grey - NMEA Output (+)
Brown - NMEA Output (-)

On GPS 72 Bare Wires
Red - Power - I know this
Black - Ground
Brown - Serial Data Out
White - Seria Data In (Although this should be blue according to the colour key)

Can anyone tell me the answer in basic ie- Connect white to blue etc.

Thanks in anticipation.....

 

[RestlessL]

Connect the radio input to the GPS output, and vice-versa.

In your case:

Radio blue - GPS Brown
Radio Grey - GPS White

Connect the (-) inputs to ground, i.e.
Radio Green and Brown to GPS Black

hope this helps

John

 

[pvb]

Radio blue to Garmin brown.
Radio green to Garmin black.
Then in the Interface menu on the Garmin, select "NMEA".
There's no need to connect the other wires, because the Garmin won't do anything with NMEA data sent by the radio.

 

[RestlessL]

[ QUOTE ]
There's no need to connect the other wires, because the Garmin won't do anything with NMEA data sent by the radio.

[/ QUOTE ]

I am not familiar with the GPS72, but some chart-plotters need NMEA data from the radio if they are to display a DSC-received location.

John

 

[pvb]

The Garmin 72 is a little handheld GPS. If you're not sure, it's usually best to check before advising.

 

[Boots]

I'm doing a similar task at the moment, but with a different make of radio.

The thing is, how do you, or what's the best way to test that the wiring and connections are correct, and that the gps data is being sent, without causing a false alarm to the Coastguard etc?

 

[pvb]

If the GPS data is getting to the radio, won't you'll be able to see the Lat/Long position on the radio display?

 

[Boots]

Thanks pvb, I think you're right.

 

[SwedishLass]

Don't overlook the obvious. Check plotter is set to nmea output and wiring good. I have used trial and error without obvious harm, but not recommending as a first resort.

I spent a considerable amount of time wiring up SH 175c to icom 601 to the point where I rewired the whole area behind instruments, as the discussion kept talking about grounding issues. (It needed doing anyway but when the obvious failed it was the next logical step, RTFM was not a lot of help!). Used a digital multimeter to verify nmea output, or at least variable voltage from the plotter wires. Then resorted to working out the various combinations, ie connect one wire and try the other 3 with the radio when correct the time and position should pop up within seconds. (Needless to say this comes with the usual health warnings but I was about to dipatch one, other or both bits of kit to Neptune by this time). Eventually put the meter on the connector from the radio and found a duff phono plug, cut it off and made up connections in traditional way and works a treat.

 

[JonBrooks]

PVB is spot on with the wiring.
If you push and hold the H/L button on the GX-1500 the screen goes into nav mode.
This will then display "no position data" until the GPS is working and wired correctly.
Once it is the screen will show lat/long and SOG.

Any more problems please feel free to call me.

All the best

 

[sailingjupiter]

Many thanks for the help everybody.

Will try it out at the weekend when I put the boat interior back together...don't ask.

 

[Andrew_Fanner]

From experience with SX-35 and Navman plotter, a ferrite or two on the wires does no harm and maybe even some good.