Re: [AFMUG] Issue with a -48 vdc Site! ground loop? Please Help!!
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?
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 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? > > >
Re: [AFMUG] Issue with a -48 vdc Site! ground loop? Please Help!!
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 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?
Re: [AFMUG] Issue with a -48 vdc Site! ground loop? Please Help!!
ill check, but we did a bench test and it did not replicate the issue On Wed, Oct 7, 2015 at 4:19 PM, Chuck McCown wrote: > 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 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? >> >> >> > >
Re: [AFMUG] Issue with a -48 vdc Site! ground loop? Please Help!!
But on the bench, the chassis was probably not grounded. From: Gino Villarini Sent: Wednesday, October 07, 2015 2:24 PM To: af@afmug.com Subject: Re: [AFMUG] Issue with a -48 vdc Site! ground loop? Please Help!! ill check, but we did a bench test and it did not replicate the issue On Wed, Oct 7, 2015 at 4:19 PM, Chuck McCown wrote: 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 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?
Re: [AFMUG] Issue with a -48 vdc Site! ground loop? Please Help!!
Have you tried isolating the PTP600 with a DC/DC converter (Meanwell RSD, etc) in between the rectifier and PIDU? On Wed, Oct 7, 2015 at 4:24 PM, Gino Villarini wrote: > ill check, but we did a bench test and it did not replicate the issue > > On Wed, Oct 7, 2015 at 4:19 PM, Chuck McCown wrote: > >> 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 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? >>> >>> >>> >> >> > >
Re: [AFMUG] Issue with a -48 vdc Site! ground loop? Please Help!!
no, will try- On Wed, Oct 7, 2015 at 4:27 PM, Josh Baird wrote: > Have you tried isolating the PTP600 with a DC/DC converter (Meanwell RSD, > etc) in between the rectifier and PIDU? > > On Wed, Oct 7, 2015 at 4:24 PM, Gino Villarini > wrote: > >> ill check, but we did a bench test and it did not replicate the issue >> >> On Wed, Oct 7, 2015 at 4:19 PM, Chuck McCown wrote: >> >>> 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 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? >>>> >>>> >>>> >>> >>> >> >> >
Re: [AFMUG] Issue with a -48 vdc Site! ground loop? Please Help!!
We have to use the duracom dc dc isolators for them but no issues once
we do it.
Basically same thing using meanwell product.
On 10/07/2015 03:29 PM, Gino Villarini wrote:
no, will try-
On Wed, Oct 7, 2015 at 4:27 PM, Josh Baird <mailto:joshba...@gmail.com>> wrote:
Have you tried isolating the PTP600 with a DC/DC converter
(Meanwell RSD, etc) in between the rectifier and PIDU?
On Wed, Oct 7, 2015 at 4:24 PM, Gino Villarini
mailto:ginovi...@gmail.com>> wrote:
ill check, but we did a bench test and it did not replicate
the issue
On Wed, Oct 7, 2015 at 4:19 PM, Chuck McCown mailto:ch...@wbmfg.com>> wrote:
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 <mailto:ginovi...@gmail.com>
*Sent:* Wednesday, October 07, 2015 2:17 PM
*To:* af@afmug.com <mailto: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
mailto:ch...@wbmfg.com>> wrote:
Is the chassis of the PIDU or the PTP600 connected to
your common ground?
*From:* Gino Villarini <mailto:ginovi...@gmail.com>
*Sent:* Wednesday, October 07, 2015 2:14 PM
*To:* af@afmug.com <mailto: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?
Re: [AFMUG] Issue with a -48 vdc Site! ground loop? Please Help!!
Does everything power normally prior to the fuse blowing? Does the ptp600 power and ping? Is the fuse properly sized? On Wed, Oct 7, 2015 at 2:22 PM, David wrote: > We have to use the duracom dc dc isolators for them but no issues once we > do it. > Basically same thing using meanwell product. > > > > > On 10/07/2015 03:29 PM, Gino Villarini wrote: > > no, will try- > > On Wed, Oct 7, 2015 at 4:27 PM, Josh Baird wrote: > >> Have you tried isolating the PTP600 with a DC/DC converter (Meanwell RSD, >> etc) in between the rectifier and PIDU? >> >> On Wed, Oct 7, 2015 at 4:24 PM, Gino Villarini >> wrote: >> >>> ill check, but we did a bench test and it did not replicate the issue >>> >>> On Wed, Oct 7, 2015 at 4:19 PM, Chuck McCown wrote: >>> >>>> 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 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? >>>>> >>>>> >>>>> >>>> >>>> >>> >>> >> > >
Re: [AFMUG] Issue with a -48 vdc Site! ground loop? Please Help!!
I remember Ken pointing out that even fast-blow fuses have a time delay.
If they're running right up around the limit, it does take time to open.
I think the last thing you want to do is put in a bigger fuse if you
suspect return path and/or polarity issues. Mixed voltages and -/+
return can really be a PITA to figure out sometimes. I would second the
suggestion for popping in a Mean Well RSD if only to figure out if you
have mixed chassis grounds. Cat5 shields come to mind. Are you passing
the shields through the WB SS's?
On 10/7/2015 10:41 PM, TJ Trout wrote:
Does everything power normally prior to the fuse blowing? Does the
ptp600 power and ping? Is the fuse properly sized?
On Wed, Oct 7, 2015 at 2:22 PM, David <mailto:dmilho...@wletc.com>> wrote:
We have to use the duracom dc dc isolators for them but no issues
once we do it.
Basically same thing using meanwell product.
On 10/07/2015 03:29 PM, Gino Villarini wrote:
no, will try-
On Wed, Oct 7, 2015 at 4:27 PM, Josh Baird mailto:joshba...@gmail.com>> wrote:
Have you tried isolating the PTP600 with a DC/DC converter
(Meanwell RSD, etc) in between the rectifier and PIDU?
On Wed, Oct 7, 2015 at 4:24 PM, Gino Villarini
mailto:ginovi...@gmail.com>> wrote:
ill check, but we did a bench test and it did not
replicate the issue
On Wed, Oct 7, 2015 at 4:19 PM, Chuck McCown
mailto:ch...@wbmfg.com>> wrote:
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 <mailto:ginovi...@gmail.com>
*Sent:* Wednesday, October 07, 2015 2:17 PM
*To:* af@afmug.com <mailto: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
mailto:ch...@wbmfg.com>> wrote:
Is the chassis of the PIDU or the PTP600
connected to your common ground?
*From:* Gino Villarini <mailto:ginovi...@gmail.com>
*Sent:* Wednesday, October 07, 2015 2:14 PM
*To:* af@afmug.com <mailto: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?
Re: [AFMUG] Issue with a -48 vdc Site! ground loop? Please Help!!
That's definitely true. The times are usually detailed when you order them. Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Oct 8, 2015 12:06 AM, "George Skorup" wrote: > I remember Ken pointing out that even fast-blow fuses have a time delay. > If they're running right up around the limit, it does take time to open. I > think the last thing you want to do is put in a bigger fuse if you suspect > return path and/or polarity issues. Mixed voltages and -/+ return can > really be a PITA to figure out sometimes. I would second the suggestion for > popping in a Mean Well RSD if only to figure out if you have mixed chassis > grounds. Cat5 shields come to mind. Are you passing the shields through the > WB SS's? > > On 10/7/2015 10:41 PM, TJ Trout wrote: > > Does everything power normally prior to the fuse blowing? Does the ptp600 > power and ping? Is the fuse properly sized? > > On Wed, Oct 7, 2015 at 2:22 PM, David wrote: > >> We have to use the duracom dc dc isolators for them but no issues once we >> do it. >> Basically same thing using meanwell product. >> >> >> >> >> On 10/07/2015 03:29 PM, Gino Villarini wrote: >> >> no, will try- >> >> On Wed, Oct 7, 2015 at 4:27 PM, Josh Baird wrote: >> >>> Have you tried isolating the PTP600 with a DC/DC converter (Meanwell >>> RSD, etc) in between the rectifier and PIDU? >>> >>> On Wed, Oct 7, 2015 at 4:24 PM, Gino Villarini >>> wrote: >>> >>>> ill check, but we did a bench test and it did not replicate the issue >>>> >>>> On Wed, Oct 7, 2015 at 4:19 PM, Chuck McCown wrote: >>>> >>>>> 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 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? >>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>> >>>> >>> >> >> > >
