[Elphel-support] POE card in custom enclosure?

Fri Jun 17 09:37:33 PDT 2011

Andrey,
I'm wondering if it may be possible to perhaps buy 2 of the custom cables you guys had made up for eyesis? These would work fine with my 12v cameras, as long as I connected them to 12v power source right?
Cheers,
Nathan 

Sent from my iPad

On 15/06/2011, at 3:30, Andrey Filippov <support-list at support.elphel.com> wrote:

> 
> 
> ---------- Forwarded message ----------
> From: Andrey Filippov <support-list at support.elphel.com>
> Date: Tue, Jun 14, 2011 at 11:29 AM
> Subject: Re: [Elphel-support] POE card in custom enclosure?
> To: Nathan Clark <nathan at nathanclark.com.au>
> 
> 
> 
> 
> On Tue, Jun 14, 2011 at 9:37 AM, Nathan Clark <nathan at nathanclark.com.au> wrote:
> Andrey,
> 
> Thanks for your insight! That sounds really quite cool!
> A few questions (and please forgive my ignorance)
> 
> I am using the 12v model elphel 353's- I would like to set up my box without needing a customized PCB...
> would it be possible to use your method and connect directly to one of the molex's coming straight from a 12v DC PSU?
> 
> 
> Nathan, why not? The idea was just to minimize number of internal connectors where disconnection/reconnection is not needed for normal operation. With the internal wiring it is sufficient that you can disconnect the cameras themselves from the cables.
> 
> Also, can you tell me how you powered the switch? was it on the same power as the rest of the assembly, or did you have to power multiple inputs, one for the switch & one for everything else?
> The "data storage box" has cradles for the HDD/SDD, so it has a power supply with +5V and +12V (in addition to 48VDC for the cameras). So the switch was powered from the 12VDC (it is a combined 5/12VDC unit)
>  
> 
> Finally, I'd love to know which switch you used.
> 
> We used Netgear GS105 
> 
> Once again, please forgive my ignorance I am not savvy with electronics and your valuable knowledge is highly appreciated!
> 
> thank you for the nice words,
> 
> Andrey
> 
>  
> 
> Thanks,
> 
> Nathan
> 
> 
> 
> 
> On Wed, Jun 15, 2011 at 1:15 AM, Andrey Filippov <support-list at support.elphel.com> wrote:
> Nathan, Sebastian,
> 
> I can tell you how it is done in the Eyesis (it uses regular 48V, 36-72V input). In order to reduce number of the connectors inside the camera (and connectors are the most likely to fail components so just the network connector on the NC353 camera can be a source of interruptions) we ordered custom modified cables - the cables are cut open near the other (opposite to the camera) connector (~10cm from the end), the two non-signal pairs are separated from the RJ45 connector, extended anothe 10cm and a 2-pin Molex Microfit-3 connectors are attached. Then, inside the "data storage box" these connector plugs go the the 48V DC connectors on the PCB there, while RJ45 (with only 2 pairs left) go to a small 5-port GigE switch. While the cameras are 100Mbps, usage iof Gigabit switch makes sense - the single (gigabit) downstream cable going out of the switch can handle 3 attached cameras without slowing them down when they are  working in parallel.
> 
> Andrey
> 
> 
> 
> On Tue, Jun 14, 2011 at 5:11 AM, Sebastian Pichelhofer <sebastian.pichelhofer at gmail.com> wrote:
> I guess it would work If the voltage range matches.
> 
> What about 2 of these?
> http://www.optimal-microsystems.com/store/product_info.php?cPath=37&products_id=187&osCsid=d1c5619458c4128fa95f8e62d04adad5
> 
> I assume your router will be inside the custom enclosure so these have
> the advantage that only the connectors that go to the cameras are on
> the outside surface of the custom enclosure and the cables inside the
> enclosure can be routed easier.
> 
> Regards Sebastian
> 
> On Tue, Jun 14, 2011 at 13:03, Nathan Clark <nathan at nathanclark.com.au> wrote:
> > Hi Sebastian,
> >
> > I certainly could put the current power injectors- as supplied from elphel-
> > within the box. Although this would be a bit of a hack.
> > I am hoping to construct a more "finished" device. It would be very nice, by
> > design, to have neatly placed I/O ethernet ports properly embedded into the
> > assembly!
> > Admittedly it is total "Overkill"... (the whole project is really)- but
> > would it still work?
> >
> > Cheers,
> >
> > Nathan
> >
> >
> > On Tue, Jun 14, 2011 at 8:41 PM, Sebastian Pichelhofer
> > <sebastian.pichelhofer at gmail.com> wrote:
> >>
> >> Hi Nathan
> >>
> >> Your cameras run on 12-36V and you should have the power injector
> >> adapter cable right?
> >> For this you would not need any PCB or circuit at all to inject the
> >> power its simply connecting certain pins of the Ethernet cable to the
> >> voltage.
> >>
> >> The link you provided states: "is an adaptor that eliminates the need
> >> to run high voltage power 110VAC to remote wireless access in order to
> >> power RF transmitters/receivers" so I think that's clearly an overkill
> >> ;)
> >>
> >> Couldn't you just place the 2 injector cable adapters inside your
> >> custom enclosure and wire both of them to a single battery with a
> >> Y-power splitter cable?
> >>
> >> Regards Sebastian
> >>
> >> On Tue, Jun 14, 2011 at 12:30, Nathan Clark <nathan at nathanclark.com.au>
> >> wrote:
> >> > Hi guys,
> >> >
> >> > I am planning to construct an enclosure to house peripherals attached to
> >> > my
> >> > elphel cameras.
> >> > This way I have everything I need in one neat box which can be powered
> >> > from
> >> > a single PSU- making the setup easier to manage in various situations.
> >> > Additionally, I would also like to use this box to have 2x POE injectors
> >> > contained within- further simplifying the design of the camera rig.
> >> >
> >> > I am hoping someone could have a look at the following component, and
> >> > confirm whether or not it would be appropriate.
> >> >
> >> > INJECTOR-PS48 - http://www.eidusa.com/Electronics_Kits_PoE_injector.htm
> >> >
> >> > or if it is not the right component, is there something you could
> >> > recommend?
> >> >
> >> > thanks for your time,
> >> >
> >> > Nathan
> >> >
> >> > PS. you can follow the progress of this project at the Apertus forum.
> >> > http://cinema.elphel.com/forums/viewtopic.php?f=4&t=108
> >> >
> >> > _______________________________________________
> >> > Support-list mailing list
> >> > Support-list at support.elphel.com
> >> >
> >> > http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com
> >> >
> >> >
> >
> >
> 
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