Experimental Physics and Industrial Control System
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Got it, that device is actually to add PoE to a non PoE switch. The link aggregation discussion I was looking at was for another product.
From: [email protected]To: [email protected]; [email protected]Subject: RE: Power over ethernet Date: Wed, 31 Jul 2013 11:11:26 -0700 CC: [email protected]
This switch supports PoE and PoE+... and is crazy cheap! But the docs available before buying is almost non existent. I use link aggregation/trunking for my network backbone and even so it says it is supported, I am wondering how many links can be aggregate and whether to expect compatibility issues with my other switches.
Moving forward with PoE, I found a company which offers Ultra and even Mega PoE. I am not sure those are standard yet, but up to 120W on CAT5 that's worth talking about! So this morning, over coffee I shared the news about those PoE switches with the electronics guy. To my surprise, one of them started drooling. Granted, that was quite a sight, but I know what that meant: like me, he wanted one!
From: [email protected]To: [email protected]; [email protected]Date: Tue, 30 Jul 2013 17:43:01 -0700 Subject: RE: Power over ethernet CC: [email protected]Hello Emmanuel, For LCLS-II electron controls we are moving to Gig-E cameras powered via PoE. We have successfully tested the following 24 port PoE injector with our new beamline camera system. It does support the IEEE 802.3at High Power PoE standard as well as the IEEE 802.3af standard. We hope to deploy a system this summer into LCLS-I. HPOE-2400G 24-Port 802.3at 30w Gigabit High Power over Ethernet Injector Hub Hope that helps, Matt Hi Emmanuel, We've been using POE for webcam's and gigE cameras for several years now and find it very useful, particularly at our experimental chambers where we often need to move cameras around. Most of these devices are class 2, < 3.8W, and we power them by adding POE modules to our Foundry switches. There's also available POE injectors which can be added inline if your switch doesn't support POE.
We haven't used POE+, so I have no direct experience, but with the small gauge of the wires in the ethernet cables you may need to limit your cable lengths for higher power devices.
Regards, - Bruce On 07/30/2013 04:07 PM, Emmanuel Mayssat wrote: Hello, After pushing for it, I was 'authorized' to investigate and test power over ethernet. PoE is basically 48 V DC / 400 mA over CAT5/6, i.e. for <13Watt devices. Is anyone of you using PoE? or PoE+ (<25W) ? My long term goal is to have, with a minimum hassle, embedded linux/EPICS in each of my chassis.
-- Bruce Hill Member Technical Staff SLAC National Accelerator Lab 2575 Sand Hill Road M/S 10 Menlo Park, CA 94025
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- RE: Power over ethernet Boyes, Matthew
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ANJ, 20 Apr 2015 |
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