PLANET FGSD-1022 - Manual (Page 143)

User’s Manual of FGSD-1022 Series
Device class Class 0 is the default for PDs. However, to improve power management at the
PSE, the PD may opt to provide a signature for Class 1 to 3.
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 shall return Class 0 to 4 in accordance with the maximum power
draw as specified by Table 4-13-1.
Current(mA) It shows the PoE device current Amp.
Consumption [W] It shows the PoE device current watt.
Power Limit It can limit the port PoE supply watts.
Per port maximum value must less than 15.4 watts, total ports values must
less than the Power Reservation value if current PoE mode is 802.3af.
Per port maximum value must less than 30 watts, total ports values must less
than the Power Reservation value if current PoE mode is 802.3at.
Once power overload detected, the port will auto shut down and keep on
detection mode until PD’s power consumption lower than the power limit value.
 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. Class 0 is the default
for PDs. However, to improve power management at the PSE, the PD may opt to provide a signature for Class 1 to 3.
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 shall return Class 0 to 3 in accordance with the maximum power draw as specified by Table 4-13-1.
Class Usage Range of maximum power used by the PD
0 Default 0.44 to 12.95 Watts
1 Optional 0.44 to 3.84 Watts
2 Optional 3.84 to 6.49 Watts
3 Optional 6.49 to 12.95 Watts
4 Optional 12.95 to 25.50 Watts
Table 4-13-1: Device class
Class 4 is defined for IEEE 802.3at high power used.
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