jbs Posted December 9, 2013 Share Posted December 9, 2013 I have a large network switch in my rack that provides POE to a few jacks. It's started acting goofy so it's time to replace it. I already have a 24-port network switch that I'm not using, but it's non-POE. I have 6 of the original 3.5" mini touchscreens connected via ethernet that I was using the POE for and it looks like it might be far more cost-effective to use my non-POE switch with some type of POE injector, rather than buy a new switch with POE. I'd like to use something like this:WS-POE-8-48v60w passive Power Over Ethernet POE Injector for 8 IP cameras, VOIP phones or Access Points, 48 volts, 60 watts maxbut I don't know the voltage requirements of the touchpanels. Since they're no longer sold by C4 I'm also not finding any specs on their site and since POE is too short as a search term I'm not having much luck in the forums. Can anyone advise whether the item above would be an appropriate way to power the touchpanels and/or what their power needs are? Thanks in advance! --Jason Link to comment Share on other sites More sharing options...
SMHarman Posted December 9, 2013 Share Posted December 9, 2013 60W will be more than adequate for 6 mini touch screens. The higher current POE devices are things like cameras with zoom and tilt and pan. If you have the central equipment rack mounted look for a device called a midspan. Does the same but in a rackmountable format. http://www.control4.cl/uploads/Products/product_10/Control4-MiniTouchScreen.pdf Is a spec sheet but it does not have power requirements detailed. Link to comment Share on other sites More sharing options...
Cyknight Posted December 9, 2013 Share Posted December 9, 2013 I believe the MTS runs at about 5w, so yes 60w peak is enough. Link to comment Share on other sites More sharing options...
jbs Posted December 9, 2013 Author Share Posted December 9, 2013 And excusing my ignorance is 48V the right voltage? The same company also sells a 24 and 12 volt model. SMHarman, thanks for the suggestion about the midspan. They seem to have a midspan 12-port but not an 8. In 8 they just offer wall-mount, but if I don't find a midspan 8 then I think this would actually fit nicely on a blank 1U plate between the switch and the incoming ports. Link to comment Share on other sites More sharing options...
Angus Posted December 10, 2013 Share Posted December 10, 2013 48 is regular POE.. the rest is for generally propriety devices... Ubiquity WAP's and such use 24... Link to comment Share on other sites More sharing options...
SMHarman Posted December 10, 2013 Share Posted December 10, 2013 The device is 802.3af. http://en.m.wikipedia.org/wiki/Power_over_Ethernet The original IEEE 802.3af-2003[2] PoE standard provides up to 15.4 W of DC power (minimum 44 V DC and 350 mA[3][4]) to each device.[5] Only 12.95 W is assured to be available at the powered device as some power is dissipated in the cable.[6] Minimum 44V so the 48V is what you need. Sent from my LT26i using Tapatalk Link to comment Share on other sites More sharing options...
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