User’s Manual of FGSW-2620VM / FGSW-2620PVM

„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

Not Allowed

Reserved for Future Use

Table 4-13-1: Device class

Class 4 is defined but is reserved for future use. A Class 4 signature cannot be provided by a compliant PD.

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