[C320-list] Data IN ... Data OUT Garmin to AutoHelmST4000Plus

[Bruce Stanley]

Hi Jeff
Do I read the 2 lines below:
----------------------------------------------------------
Brown Data OUT wire from Garmin  --->  To Raymarine NMEA +
*GROUND wire* from Garmin cable    --->  To Raymarine NMEA -.
----------------------------------------------------------
to mean that the *"12v" GROUND wire* from the Garmin ---> to Raymarine
NMEA???????

Bruce Stanley
Sydney
==================================================
On Dec 24, 2007 6:54 AM, Jeff Hare <catalina at thehares.com> wrote:
> Hi Bruce,
>
>   I probably should have researched this first, but from memory and what
> you've provided:
>
>   Garmin uses a 4 wire cable.  Power +12, NMEA Data IN,  NMEA Data OUT,
> GROUND (0v)
>
> For this application, I believe you'll be using the GARMIN BROWN (Data
Out),
> and the Ground wire.
> On the Raymarine end, I believe you'll connect:
>
> Brown Data OUT wire from Garmin  --->  To Raymarine NMEA +
> GROUND wire from Garmin cable    --->  To Raymarine NMEA -.
>
> This effectively TRANSMITS NMEA Sentences From the Garmin to the ray
marine
> NMEA Listening port.
>
> Since you don't need your GPS LISTENING to NMEA 1083 sentences from the
> RayMarine autopilot (other sources), you won't use the White DATA IN line.
>
> Does this make sense?
>
> Also, when you set up your Autopilot, you need to be sure that it's
> listening to NMEA 1083 as well as setting the Garmin transmitting mode to
> NMEA 1083.
> Usually the Garmin transmits using "GARMIN" protocol, so if you haven't
> changed that, you'll need to.
>
> I hope I got this right, but no harm will come if polarity is reversed
here,
> because they're only signal lines.
>
> If you need longer runs, standard network cable CAT-5 used for computer
> networks is just fine for this.
>
> -Jeff
>
> PS: I believe that you can drive up to 3 NMEA devices from the NMEA 1083
> output of your Garmin.
>
> -----Original Message-----
> From: c320-list-bounces at catalina320.com
> [mailto:c320-list-bounces at catalina320.com] On Behalf Of Bruce Stanley
> Sent: Sunday, December 23, 2007 3:54 AM
> To: C320-List
> Subject: [C320-list] Data IN ... Data OUT Garmin to AutoHelmST4000Plus
>
>
> Data IN and Data OUT
> Can you clarify?
>
> Firstly, I have the GarminGPS48 connected to my ST4000+
> I have 12v power, but
> "NO DATA".
>
> Garmin say:
> White=Data IN
> Brown=Data OUT
>
> ST4000Plus say:
> NMEA +, and
> NMEA -.
> ==============================================
> do I connect Garmin "White" to ST4000Plus "NMEA -"         ?????????????
> ==============================================
> HELP, PLEASE
> Have a great Festive Season, tooooooooooo
>
> Bruce Stanley
> C320 #1084
> Sydney Australia
>
> PS I have looked on Garmin and Raymarine sites...2 glasses of Red Wine
> Later I gave up!
>
>
>
>