Analog Devices DC2911A Demo Manual page 6

DEMO MANUAL DC2911A
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Table 4. Interoperability (T2P Response*, PSE Allocated Power, Number of Class/Mark Events)
IEEE 802.3
TYPE 1
PD REQUESTED CLASS CLASS 3
(PD REQUESTED POWER) (13W)
Hi-Z
CLASS 0−3
Up to 13W
(Up to 13W)
1-Event
Hi-Z
CLASS 4
13W
(25.5W)
1-Event
Hi-Z
CLASS 5
13W
(40W)
1-Event
Hi-Z
CLASS 6
13W
(51W)
1-Event
Hi-Z
CLASS 7
13W
(62W)
1-Event
Hi-Z
CLASS 8
13W
(71.3W)
1-Event
Note 1. Shade of blue indicates the PD has been demoted or denied power.
* Specified as the percentage of the period which T2P is low impedance with respect to GND.
** Auxiliary Power Supply must be sized to provide PD Requested Power.
6
IEEE 802.3 IEEE 802.3
TYPE 2 TYPE 3
CLASS 4 CLASS 4 CLASS 5
(25.5W) (25.5W) (40W)
Hi-Z Hi-Z Hi-Z
Up to 13W Up to 13W Up to 13W
1-Event 1-Event 1-Event
Low-Z Low-Z Low-Z
25.5W 25.5W 25.5W
2-Event 3-Event 3-Event
Low-Z Low-Z 50%
25.5W 25.5W 40W
2-Event 3-Event 4-Event
Low-Z Low-Z Low-Z
25.5W 25.5W 25.5W
2-Event 3-Event 3-Event
Low-Z Low-Z Low-Z
25.5W 25.5W 25.5W
2-Event 3-Event 3-Event
Low-Z Low-Z Low-Z
25.5W 25.5W 25.5W
2-Event 3-Event 3-Event
PSE TYPE, CLASS (POWER)
IEEE 802.3
TYPE 4
CLASS 6 CLASS 7 CLASS 8
(51W) (62W) (71.3W)
Hi-Z Hi-Z Hi-Z
Up to 13W Up to 13W Up to 13W Up to 13W
1-Event 1-Event 1-Event
Low-Z Low-Z Low-Z
25.5W 25.5W 25.5W
3-Event 3-Event 3-Event
50% 50% 50%
40W 40W 40W
4-Event 4-Event 4-Event
50% 50% 50%
51W 51W 51W
4-Event 4-Event 4-Event
50% 25% 25%
51W 62W 62W
4-Event 5-Event 5-Event
50% 50% 25%
51W 51W 71.3W
4-Event 4-Event 5-Event
LTPoE ++
(38.7W) (52.7W) (70W)
Hi-Z Hi-Z Hi-Z
Up to 13W Up to 13W Up to 13W
1-Event 1-Event 1-Event
Low-Z Low-Z Low-Z
25.5W 25.5W 25.5W
2-Event 2-Event 2-Event
75% 75% 75%
38.7W 38.7W 38.7W
3-Event 3-Event 3-Event
75% 75%
DENIED 52.7W 52.7W
3-Event 3-Event
75%
DENIED DENIED 70W
3-Event
DENIED DENIED DENIED
T2P Response* →
PSE Allocated Power →
Number of Classification Events →
AUXILIARY
POWER
(90W) SOURCE**
Hi-Z Low-Z
Aux. Power
1-Event N/A
Low-Z Low-Z
25.5W Aux. Power
2-Event N/A
75% 75%
38.7W Aux. Power
3-Event N/A
75% 75%
52.7W Aux. Power
3-Event N/A
75% 75%
70W Aux. Power
3-Event N/A
75% 75%
90W Aux. Power
3-Event N/A
↓
75%
90W
3-Event
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