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PD Classifications
A PD may be classified by the PSE based on the classification information provided by the PD. The intent of PD classification
is to provide information about the maximum power required by the PD during operation. However, to improve power
management at the PSE, the PD provides a signature about Class level.
The PD is classified based on power. The classification of the PD is the maximum power that the PD will draw across all input
voltages and operational modes.
A PD will return to Class 0 to 8 in accordance with the maximum power draw as specified by
Class
Usage
0
Default
1
Optional
2
Optional
3
Optional
Valid for Type 2 (802.3at)
4
devices,
not allowed for 802.3af devices
5
Valid for Type 3 (802.3bt)
devices
6
7
Valid for Type 4 (802.3bt)
devices
8
Range of maximum power used by the PD
0.44 to 12.95 watts
0.44 to 3.84 watts
3.84 to 6.49 watts
6.49 to 12.95 watts (or to 15.4 watts)
12.95 to 25.5 watts
40 watts
51 watts (4-pair)
62 watts (4-pair)
71.3 watts (4-pair)
Table 4-7-1 Device Class.
417
User's Manual of WGS-5225-8P2S Series
Table 4-7-1.
Class Description
Classification unimplement
Very low power
Low power
Mid power
High power
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