garmin gps and raymaine wiring

[Chiliblue]

Evening,

Finally getting to the point in my refit where wiring everything up has thrown up a lot of questions.

I have st60+ wind and tridata units, plus a st60 multi. My plan is to power the instruments from the multi (as it is mounted on my main switch panel) Will that work?

Next issue is gps nmea to the st60 multi, rl70crc and the dsc vhf. I have a old but working garmin gps36. Looking at the wiring it appears to have 2 sets of nmea outputs. Is anyone familiar with the gps36? Can I take nmea to the St60 multi in and then take the St60 multi nmea out to the plotter? And use the second nmea pair from the gps36 to pass data to the vhf?

The st60 multi states that it carries nmea to seatalk and visa versa... although there are plenty of posts that dispute this. In reality I don't think it matters in my set up. All I want is from the Multi to display all the information for the log book. Saying that if it does pass nmea to seatlak do I even have to supply the rl70crc with nmea at all or will it get the data it requires from the seatalk connection?

Thanks in advance.

Chiliblue

 

[nigelmercier]

First of all you need to make or buy 2-wire SeaTalk cable to power the ST60-Multi. You need a 4-wire SeaTalk cable to link the ST60-Multi on your switch panel to the next ST60 in the chain, then another 4-wire SeaTalk loop out of that one to the next etc. Then take your NMEA out from the GPS and feed it to the ST60-Multi, then to your other devices with NMEA input.

 

[Chiliblue]

First of all you need to make or buy 2-wire SeaTalk cable to power the ST60-Multi. You need a 4-wire SeaTalk cable to link the ST60-Multi on your switch panel to the next ST60 in the chain, then another 4-wire SeaTalk loop out of that one to the next etc. Then take your NMEA out from the GPS and feed it to the ST60-Multi, then to your other devices with NMEA input.

Thanks for that.

4 wire seatalk? I have 3 wire and the st60/st60+ only have three poles so have I missed something?

I was going to cut down a standard seatalk cable just connecting the grd and the red wire, I'll terminate the yellow.

Chiliblue

 

[Talulah]

Thanks for that.

4 wire seatalk? I have 3 wire and the st60/st60+ only have three poles so have I missed something?

I was going to cut down a standard seatalk cable just connecting the grd and the red wire, I'll terminate the yellow.

Chiliblue

You've not missed anything. Seatalk is 3 wire. NMEA is 4 wire (+ - in, + - out.)

 

[Otter]

First of all you need to make or buy 2-wire SeaTalk cable to power the ST60-Multi. You need a 4-wire SeaTalk cable to link the ST60-Multi on your switch panel to the next ST60 in the chain, then another 4-wire SeaTalk loop out of that one to the next etc. Then take your NMEA out from the GPS and feed it to the ST60-Multi, then to your other devices with NMEA input.

Hi Nigel, I know you're knowledgable on these things but I've had loads of Raymarine gear and it's only ever been three wire Seatalk???

 

[Talulah]

... And to all those people who have just bought a new Raymarine autopilot there is a new model due out this Summer. "Evolution Autopilot"
(Thread drift)

 

[earlybird]

Your Multi should power the wind and Tridata unitd OK, but I don't know about powering the plotter, if that's your intention.
You should be able to use the Garmin outputs as you intend, but since 1 output will support several listeners, you could only use one.
The Multi will pass GPS NMEA output onto Seatalk, so your plotter should get the necessary position information.
( I'm basing this on my ST60 Graphic, which does the same thing).

 

[Chiliblue]

Your Multi should power the wind and Tridata unitd OK, but I don't know about powering the plotter, if that's your intention.
You should be able to use the Garmin outputs as you intend, but since 1 output will support several listeners, you could only use one.
The Multi will pass GPS NMEA output onto Seatalk, so your plotter should get the necessary position information.
( I'm basing this on my ST60 Graphic, which does the same thing).

The Plotter has it's own power the seatalk port only does seatalk the 12v+ isn't connected.

The nmea, is more confusing really. The plotter has nmea in and out, as does the st60 multi, By the look of it the vhf only has a nmea in pair. The plotter also has a seatalk port.

If the nmea is carried via the seatalk-in to the plotter then that would make life easier, but does the st60 pass the nmea through when it isn't powered up? Be comforting to have the lat/lon given to the vhf, even if I only have that and gps receiver live which is why I would like to connect the gps directly to the vhf and the st60. (or perhaps I am missing something and I can just connect the vhf and the st60 with a simple Y junction.

My gps cable has a lot of cores.

Red: VIN

Black: GND - Power and Signal Ground

White: TXD1 - First Serial Asynchronous Output. RS-232 compatible electrical specification. This output normally provides serial data which is formatted per “NMEA 0183,Version 2.0”. Switchable to 1200, 2400, 4800 and 9600 BAUD. This output functions in parallel with the NMEA output.

Blue: RXD1 - First Serial Asynchronous input. RS-232 compatible with maximum input voltage range-25<V <25. This input may be used to receive serial initialization/configuration data, as specified in Section 4.1.

Purple: TXD2 - Second Serial Asynchronous Output. Electrically identical to TXD1.

Green: RXD2 - Second Serial Asynchronous Input. Electrically identical to RXD1. This input may be used to receive serial differential GPS data formatted per “RTCM Recommended Standards For Differentia Navstar GPS Service, Version 2.0” (seeSection 4 for more details).

Gray: NMEA-NMEA0183, Version 1.5 electrical specification compatible serial output. This output is also CMOS compatible with a no load voltage swing of 0.2Vdc to 4.8Vdc. This output normally provides ASCII sentences formatted per “NMEA 0183,Version 2.0”. User selectable baud rates
of 1200, 2400, 4800, and 9600 are available. The data output on this pin is identical to the data output on TXD1.

Yellow: VAUX - Optional External Backup Power Connection. This is an optional connection. Internal battery capacity is 180 mA hour. Typical current requirement is 65 uA @ 5VDC. If used, a 4VDC to 30 VDC power source is required.

Sorry for all the detail, which of these wires can I use? Obviously there is red for 12v+ and Black for gnd/signal, but can I use and of the TXD wires White and Purple Along with the Black or Is the Grey NMEA the one I have to use (again along with the Black)?