Changes between Version 40 and Version 41 of poe


Ignore:
Timestamp:
11/30/2020 07:12:34 PM (19 months ago)
Author:
Tim Harvey
Comment:

added 802.3at/bt standard details

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  • poe

    v40 v41  
    1010 * class 3 - 15.4W available for max device power of 12.95W
    1111 * class 4 (PoE+) - 30W available for max device power of 25.5W
    12  * class 5 (PoE++) - 45W available for max device power of 40W
     12 * class 5 (PoE++ type 3) - 60W available for max device power of 51W
     13 * class 6 (PoE++ type 4) - 100W available for max device power of 71W
    1314
    1415
     
    1819 * 802.3af-2003 standard provides up to 15.4W of DC power (min 44Vdc and 350mA) to each device.  Only 12.95W is assured to be available at the powered device (as some power is dissipated in the cable)
    1920 * 802.3at-2009 standard (PoE+) provides up to 25.5W of power and prohibits a powered device from using all four pairs for power.  Some vendors have products that offer up to 51W by utilizing all four pairs.
     21 * 802.3bt-2019 standard (PoE++) provides up to 51W of power (Type 3) and up to 71W (Type 4).
    2022
    2123References:
     
    6163
    6264
    63 == 802.3af
    64 802.3af is a standard adopted in 2003 for intelligent Power Over Ethernet where a signature is required before the supply turns on voltage.
     65== 802.3af / 802.3at / 802.3bt
     66802.3af/at/bt are standards for intelligent Power Over Ethernet where a signature identifying a power class is required before the supply turns on voltage.
    6567
    66 Gateworks boards with true 802.3af support:
    67  - Newport GW640x/GW630x/GW620x
     68Gateworks boards with support:
     69 - Venice GW730x: 802.3at class 5
     70 - Venice GW720x: 802.3at class 4
     71 - Newport GW640x/GW630x/GW620x: 802.3at class 4
    6872
    6973== 802.3af and Auxillary power