On 9 February 2016 at 09:10, Erik Christiansen <dva...@internode.on.net> wrote: > The two-terminal dongle would be used for half-duplex, with separate > grounds, relying on less than 7v float.
This is where things get iffy. Imagine that I have the 2-terminal dongle plugged into a laptop. What do I use for a gnd? Stuff a wire down the side of the USB connector? trap the wire in the hinge? :-) Looking at Modbus specs,even the "two wire" version has a common. My dongle doesn't. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
