Yes, that was my plan to run everything off of 120v except the VFD. JT
On 12/26/2015 2:58 PM, Bertho Stultiens wrote: > On 12/26/2015 09:32 PM, John Thornton wrote: >>>>> Not sure how I might isolate the VFD from the chassis at this moment. >>>>> Well I could machine some delrin standoffs... I have a machine shop. >>>> No problem. If you ensure that the chassis connection is firm and >>>> electrically sound, then you just ommit the earth wire (my comment in >>>> the drawing). >>> One more comment. If you are unsure that the internal earth/chassis >>> connection in the VFD controller holds, then you usually see a >>> connection as seen in the attached image. A short thick wire is run from >>> the earth screw connection to one of the chassis mounting bolts. >> Ok that is easy to do, I have some huge stranded ground wire from a CT >> scanner... I've attached my updated drawing of the VFD panel. >> >> The monitor can only run on 120v so it is necessary to transform from >> 240 to 120 for the PC and monitor. > Hm, then you may want to run everything off of the 120V section and > ensure that you connect both computer and monitor to the star-connection > for earth. > > Doing a 240/120 split between computer and monitor will get you again > into trouble. In that case you have a monitor (assuming VGA) cable that > bridges the power domains. > > Please note that you still need the serial isolator, regardless from > where the computer and monitor are powered. > ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
