On Tuesday, September 06, 2011 10:19:35 PM Andy Pugh did opine: > On 6 Sep 2011, at 15:21, Don Stanley <dstanley1...@gmail.com> wrote: > > The transformer will isolate the common return for you so > > your equipment will stay at earth ground and you won't glow in the > > dark when you touch it. > > Which transformer? > The AC transformer between the line and the rectifiers.
> Does the Drive care that the DC is not referenced to logic 0V? > No, as long as the control is opto-isolated. But since there is also a feedback to handle, its better if the drive power can be ground referenced. Cheers, gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://204.111.67.138:85/gene> All true wisdom is found on T-shirts. ------------------------------------------------------------------------------ Using storage to extend the benefits of virtualization and iSCSI Virtualization increases hardware utilization and delivers a new level of agility. Learn what those decisions are and how to modernize your storage and backup environments for virtualization. http://www.accelacomm.com/jaw/sfnl/114/51434361/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
