Changes between Version 40 and Version 41 of poe

Timestamp:

11/30/2020 07:12:34 PM (4 years ago)

Author:

Tim Harvey

Comment:

added 802.3at/bt standard details

poe

@@ -10 +10 @@
  * class 3 - 15.4W available for max device power of 12.95W
  * class 4 (PoE+) - 30W available for max device power of 25.5W
- * class 5 (PoE++) - 45W available for max device power of 40W
+ * class 5 (PoE++ type 3) - 60W available for max device power of 51W
+ * class 6 (PoE++ type 4) - 100W available for max device power of 71W
 
 
@@ -18 +19 @@
  * 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)
  * 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.
+ * 802.3bt-2019 standard (PoE++) provides up to 51W of power (Type 3) and up to 71W (Type 4).
 
 References:
@@ -61 +63 @@
 
 
-== 802.3af
-802.3af is a standard adopted in 2003 for intelligent Power Over Ethernet where a signature is required before the supply turns on voltage. 
+== 802.3af / 802.3at / 802.3bt
+802.3af/at/bt are standards for intelligent Power Over Ethernet where a signature identifying a power class is required before the supply turns on voltage.
 
-Gateworks boards with true 802.3af support:
- - Newport GW640x/GW630x/GW620x
+Gateworks boards with support:
+ - Venice GW730x: 802.3at class 5
+ - Venice GW720x: 802.3at class 4
+ - Newport GW640x/GW630x/GW620x: 802.3at class 4
 
 == 802.3af and Auxillary power