Operating Rules
Operating Rules
External Switch Power
Table | Power Usage |
|
|
Class | Usage | Minimum Power Levels | Range of Maximum |
|
| at Output of PSE | Power required by |
|
|
| the PD |
|
|
|
|
0 | Default | 15.4 Watts | 0.44 to 12.95 Watts |
1 | Optional | 4.0 Watts | 0.44 to 3.84 Watts |
2 | Optional | 7.0 Watts | 3.84 to 6.49 Watts |
3 | Optional | 15.4 Watts | 6.49 to 12.95 Watts |
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|
|
|
As you can see in the table, any 802.3af compliant PD will never require more than 12.95 watts. The switch provides a minimum of 15.4 watts at the port in order to guarantee enough power to run a device, after accounting for line loss.