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PoE, IEEE standards, max power

Carl Bj?rk All Messages By This Member #68432 Hi All, I am currently looking into Power over Ethernet so I can remove my 12V cable. My concern is about max power, there are four standards, latest one allows to provide 100W. I found a passive PoE splitter/injector kit, but I failed to find what standard it is and so if it can handle the power I need:?https://www.digitus.info/de/produkte/aktive-netzwerkkomponenten/power-over-ethernet-poe/poe-splitter/dn-95001/?PL=en I have a 146W 12V adapter and I estimate my power usage to be around 100W. Do any of you have been experimenting with PoE ? What do you think, is it feasible ? Many thanks, Cheers and CS!
Paul Goelz All Messages By This Member #68433 On 10/28/2020 7:39 AM, Carl Bj?rk wrote: I have a 146W 12V adapter and I estimate my power usage to be around 100W. Do any of you have been experimenting with PoE ? What do you think, is it feasible ? 100W at 12V is 8.3A. I seriously doubt that you can pass anywhere close to that much current through the small conductors of an Ethernet cable of any appreciable length without excessive heating and voltage drop. I do not have actual PoE experience but unless there is an active voltage step up / step down process involved (to reduce the current for a given transmitted power), it is simple ohms law. Paul - Paul Goelz Rochester Hills, MI USA pgoelz@... www.pgoelz.com
David C. Partridge Member Profile All Messages By This Member #68434 开云体育 PoE is 44V for a start, and all but the latest versions are limited to 15 or 25W maximum.?? Great for powering PoE micro controllers (will the RPi run off PoE?). ? Useless for powering the Gemini-2 and the mount though for which a 12V minimum (ideally 15-18V) supply that’s capable of 3A without breaking a sweat is needed. ? D. toggle quoted message Show quoted text From: [email protected] [mailto:[email protected]] On Behalf Of Carl Bj?rk Sent: 28 October 2020 11:39 To: [email protected] Subject: [Losmandy_users_io] PoE, IEEE standards, max power ? Hi All, I am currently looking into Power over Ethernet so I can remove my 12V cable. My concern is about max power, there are four standards, latest one allows to provide 100W. I found a passive PoE splitter/injector kit, but I failed to find what standard it is and so if it can handle the power I need:?https://www.digitus.info/de/produkte/aktive-netzwerkkomponenten/power-over-ethernet-poe/poe-splitter/dn-95001/?PL=en I have a 146W 12V adapter and I estimate my power usage to be around 100W. Do any of you have been experimenting with PoE ? What do you think, is it feasible ? Many thanks, Cheers and CS!
Carl Bj?rk All Messages By This Member #68435 Thanks for your answers. I read 9-56V, up to 100W. But yes I too doubt it would be safe. I'll keep my 12V cable, let's try and keep stars in the sky :')
Sonny Edmonds #68436 On Wed, Oct 28, 2020 at 06:50 AM, Carl Bj?rk wrote: I'll keep my 12V cable, let's try and keep stars in the sky :') I agree Carl, you don't want a miniature Super Nova in your cable.... My first thought was how would that effect your data traveling along the same path? Heat, magnetics, and such. Shucks, I use two power cables to my little rig. One for the Gemini II, and a separate one for the telescope needs. Just so the mounts operations (amperage draws and variations) don't draw down on the USB hub and cameras needs (AKA: Mission critical power needs). ? -- SonnyE (I suggest viewed in full screen)

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