[Public-list] was inverter now DC electronics

[John Boor]

I just went to the raymarine web site to find the answer.  The ST30 series
of instruments can be powered individually or can be connected as a loop,
they call this seatalk.  Only one cable connects each instrument together
so it would appear that the 3rd pin is probably  a data link connection. 
If you want the owners manual it is available as a down load.

John Boor
MAHSEER #380

> Great. So it sounds like the bottom line is that I can use a modified sine
> wave inverter to power my laptop. Awesome.
>
> Thanks for all the contributions everybody! I learned a lot here! Very
> helpful stuff!
>
> On a somewhat related subject...I am installing wind and depth/speed
> instruments. They came with my boat 4 years ago. They are Raymarine ST-30
> instruments. I am just now installing them. I went to wire them up last
> night and they have 3-pins on the connector for power. Now, since they are
> DC-powered electronics, why would they need 3 pins? I am a bit confused
> about this.
>
> Kind regards,
>
> J Bergquist
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