Changes between Version 15 and Version 16 of poe


Ignore:
Timestamp:
10/02/2018 02:12:23 PM (2 months ago)
Author:
Tim Harvey
Comment:

added PoE classes

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  • poe

    v15 v16  
    22
    33= Power Over Ethernet (PoE) Notes =
     4PoE works by having a PoE capable injector or network switch. When the switch connects to a device, the switch tries to make a handshake with the device.  The device has to have the signature to be able to do the handshake to activate PoE.  Some Gateworks boards do not have this signature.   If the signature is not detected, then power is not turned on.
    45
    5 PoE works by having a PoE switch.  When the switch connects to a device, the switch tries to make a handshake with the device.  The device has to have the signature to be able to do the handshake to activate PoE.  Some Gateworks boards do not have this signature.   If the signature is not detected, then power is not turned on.
     6PoE has evolved to define several different classes of power requirements:
     7 * class 0 - (no signature) max device power of 12.95W
     8 * class 1 - 4.0W available for max device power of 3.84W
     9 * class 2 - 7.0W available for max device power of 6.49W
     10 * class 3 - 15.4W available for max device power of 12.95W
     11 * class 4 (PoE+) - 30W available for max device power of 25.5W
     12 * class 5 (PoE++) - 45W available for max device power of 40W
     13
    614
    715''' Please reference the user manual for the product to learn if it has POE capability at [http://www.gateworks.com/usermanuals]
     
    1321References:
    1422 * http://en.wikipedia.org/wiki/Power_over_Ethernet
    15 
     23 * http://www.veracityglobal.com/resources/articles-and-white-papers/poe-explained-part-2.aspx
    1624
    1725[=#gateworks]