Autohelm ST50 speed and depth guages

I've mixed ST50 and ST60 instruments successfully. The Sea Talk protocol works for both, but the plug shapes are different - dead easy to make up cable using mini-spade connectors and avoid the need for an expensive Raymarine cable.

That being so, an ST60 (ebay) or ST60+ (swindlery) tri-data display will put speed and depth on one instrument.

product_st60_tridata_thru-hull.jpg
 
Thanks for that, it answers a question I was wondering about with the units being out of date and getting rare.
My real question is that I have these units inside but I want to duplicate them onto the flybridge outside. How do you do this?
 
[QUOTE
My real question is that I have these units inside but I want to duplicate them onto the flybridge outside. How do you do this?[/QUOTE]
What TwisterKen meant by his answer was that Raymarine instruments, including the Tridata, will act as repeaters for other, master instruments that are transmitting seatalk. It's just a question of connecting them up. A more expensive display that does a similar job is the Raymarine Graphic.
 
ST50 and 60

Just to clarify Twister Ken's advice. The ST60 Tridata Repeater is the display only version of the instrument which is what you want. It takes Seatalk data from the ST50 intruments and does not have its own transducers. Ignore the transducers in the pix Ken included.

Otherwise a ST40 Bidata display will also do the job for Depth and Speed.
 
Install a ST60 repeater on your flybridge and run a Seatalk cable from there to the main instrument at your other position. You will need to get hold of a ST50 compatible plug to splice on to the end at the original instrument. The other end can be connected by splicing on 3mm spade connectors. The colours on the cable match the colours by the connectors on the instrument head. Its only a two core and shield anyway. The hard part will be getting a ST50 compatible Seatalk plug.
 
Oh dear I'm getting lost!!!
Understand now, about tri data units - That's great cos I did not know they existed.
The end of the tridata system is clear enough - I guess it needs a plug to suit whatever its got.
The ST50 depth, as far as I can see, has 3 dedicated cables which are all used. I havent looked at the ST50 speed so were do you connect into?
I have no idea what sea talk is!!
Sorry to be such a numpty but I am new to this.:confused:
 
[QUOTE
The end of the tridata system is clear enough - I guess it needs a plug to suit whatever its got.
The ST50 depth, as far as I can see, has 3 dedicated cables which are all used. I havent looked at the ST50 speed so were do you connect into?
I have no idea what sea talk is!:[/QUOTE]
IIRC, your ST50 instruments each have 3 separate cables, The uppermost one is to the appropriate transducer. The 2 lower ones, which both do the same job, each consist of a short piece of cable with a connector, are the power and seatalk supplies. These cables have 3 conductors, red is 12volt +ve, yellow is seatalk, and a bare shield, which is ground or battery -ve.
Seatalk is the signal which sends information around a Raymarine instrument system.
Your instruments are probably connected in series, or "daisy-chained", by these cables, so, on the ST50 depth, one will go to the power supply, the other one will go to the ST50 speed. The ST50 speed will, hopefully, therefore have a spare connection, which you need to daisy-chain onwards to the 3 pin input on the tridata. This will provide the tri-data with power and also speed and depth information. Eureka!!
As said earlier, you might find an extra ST50 connector hard to source. best of luck.
 
Whilst the ST instruments allow "daisychaining" of Seatalk as mentioned by Earlybird and hopefully his description will suit your installation and work fine, Seatalk can be wired in parallel too. It is common to have a small junction box to wire up to 8 (can be more and depends upon cable length for power) to simply connect each of the Seatalk wires of the same colour (function) together. Usually Red=12v, Yellow=data, Grey/or bare shield =Gnd(12v-ve) .
If you don't have a spare Seatalk socket on one of your ST50 instruments you can cut the cable between the 2 instuments, put in a junction box and split off to the ST50 and the Tridata. It will allow other S/T connection later too.
 
prv said:
I would hope that, four years on, the OP has managed to put his clocks outside by now :)

Pete
Click to expand...

I would hope so too! ;)

Perhaps I got too excited by the discovery that the ST50 does (after all) have a built-in way of outputting NMEA data. It's from the ST50 TriData Repeater. Which is the perfect antedote for yesterday's dissapointing news from Angus that he's sold out of all his SeaTalk-NMEA YAPP converters.

Link - http://www.ybw.com/forums/showthread.php?362395-2nd-YAPP-in-production-Seatalk-to-USB
 
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