---------- Forwarded message ---------- From: Andrey Filippov <support-list@support.elphel.com> Date: Tue, Jun 14, 2011 at 11:29 AM Subject: Re: [Elphel-support] POE card in custom enclosure? To: Nathan Clark <nat...@nathanclark.com.au>
On Tue, Jun 14, 2011 at 9:37 AM, Nathan Clark <nat...@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@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.pichelho...@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 <nat...@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.pichelho...@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 < >>> nat...@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@support.elphel.com >>> >> > >>> >> > >>> http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com >>> >> > >>> >> > >>> > >>> > >>> >>> _______________________________________________ >>> Support-list mailing list >>> Support-list@support.elphel.com >>> >>> http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com >>> >> >> > > _______________________________________________ > Support-list mailing list > Support-list@support.elphel.com > http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com > >
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