New equipment and integration of existing

[Lazybones]

Thanks again.

I need one clarification or perhaps a diagram.

The current SG3 course computer is connected to the ST6001 and ST50+ instruments through from the course computer's seatalk port which I believe is the source of power to the seatalk devices.

If the Seatalk to Seatalk NG converter through its Seatalk side of the adapter cable is supplying power to the seatalk network, how do I eliminate the power that is provided from the course computer?

As you indicated, the original seatalk network should be its own network.

This is why I thought by disconnecting the red 12v+ wire from the joining of the adapter cable to the seatalk network would solve that problem, but you indicated a possible ground loop.

Any suggestions or diagrams to show how this is done? The diagrams in the manuals all show an ST70 as the bridge to Seatalk without showing how the ST50+ instruments would interface to themseleves and the SG3 course computer.