If you put the PIDU and PTP600 on a cardboard box or other insulating surface, can you see –48 VDC on their cases or chassis?
From: Gino Villarini Sent: Wednesday, October 07, 2015 2:17 PM To: af@afmug.com Subject: Re: [AFMUG] Issue with a -48 vdc Site! ground loop? Please Help!! i think so, afaik is floating ground On Wed, Oct 7, 2015 at 4:15 PM, Chuck McCown <ch...@wbmfg.com> wrote: Is the chassis of the PIDU or the PTP600 connected to your common ground? From: Gino Villarini Sent: Wednesday, October 07, 2015 2:14 PM To: af@afmug.com Subject: [AFMUG] Issue with a -48 vdc Site! ground loop? Please Help!! So we are moving a site form AC to DC -48 this is the setup: Emerson Rectifier feeding: Telco System MPLS router Planet Fiber SW 2 Netonix DC Switches 2 SAF POE Injectors 2 PTP600 PIDUs AFAIK all the mentioned gear above are floating ground We have this gear connected to the Netonix: Airfiber24, Epmp, PMP450 all wireless gear is using shielded cable that is terminated in a WBMGF SS on the rack So this is the issue, we migrated everything to DC, when we connect the PTP600 PIDU to the rectifier, the fuse on the emerson output feeding the Netonix blows..not instantly.. it takes some 30-45 secs.. im scratching my head on this one... any ideas?
