Thanks. Very useful link. John
> -----Original Message----- > From: Ken Strauss [mailto:ken.stra...@gmail.com] > Sent: September-09-19 8:23 AM > To: 'Enhanced Machine Controller (EMC)' > Subject: Re: [Emc-users] MESA 7i92H Power > > Or power the BoB from the 7i92. See > https://www.cnczone.com/forums/tormach-pathpilot-/354420-tormach- > software.html > for another user's approach. > > > -----Original Message----- > > From: John Dammeyer [mailto:jo...@autoartisans.com] > > Sent: Monday, September 09, 2019 11:16 AM > > To: 'Enhanced Machine Controller (EMC)' > > Subject: Re: [Emc-users] MESA 7i92H Power > > > > Thanks. At the moment I'm running it from a small AC to 5V adaptor but > that's > > one more thing plugged into AC power. I do have a 5V output from the BoB > that > > I can use. Just have to wire it into the 7i92H. > > John > > > > > > > -----Original Message----- > > > From: Les Newell [mailto:les.new...@fastmail.co.uk] > > > Sent: September-09-19 3:52 AM > > > To: emc-users@lists.sourceforge.net > > > Subject: Re: [Emc-users] MESA 7i92H Power > > > > > > Yes you can run it using a supply derived from 24V. In my opinion it is > > > better that way as it keeps the computer isolated from the potentially > > > noisy system ground. > > > > > > Les > > > > > > On 09/09/2019 04:30, John Dammeyer wrote: > > > > Quick question. Running signals from the parallel port to the BoB > > > definitely couples the PC Ground into the Bob. Generally then the BoB > > > optically isolates the PC signals from the rest of the system Or > expects the > > > motor driver to do it. And for the rest the BoB is supplied with an > isolated > > > supply that is not connected to the PC side. > > > > > > > > Since Ethernet runs the 7i92H and it comes from the PC does the 5V > power > > > into the 7i92H have to have the 5V DC Ground common with the PC DC > > > ground? Or can the 5V be derived from a 24V power supply whose > ground > is > > > not common with the PC ground because there's no direct connection. I > > > recall something about PCs using transformers inside the RJ-45 Ethernet > > > connector but I don't remember for sure. > > > > > > > > John > > > > > > > > > > > > > > > > _______________________________________________ > > > Emc-users mailing list > > > Emc-users@lists.sourceforge.net > > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > > > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
