Chapter 1: Overview
36
Powered Device
Classes
Powered devices are grouped into the nine classes listed in Table 9. The
classes are based on the amount of power the devices require. The x530-
28GPXm and x530-52GPXm switches support classes 0 to 4. The x530-
10GHXm and x530-18GHXm switches support classes 0 to 8.
Caution
When hot-swapping PoE PD Classes 5-8, the integrated circuit (IC)
device can be damaged when the Ethernet cable is removed while
supplying PoE power. To avoid damage, disable the port with the
CLI or power off the unit before removing the cable. E133
Power Budget The x530-28GPXm and x530-52GPXm switches have two power
supplies. Each power supply provides 370W for a total PoE of 740W. This
is the total maximum amount of power that the switch can supply to
powered devices on the PoE+ copper ports. The number of powered
devices that the switches can support at one time will depend on their
power requirements. For instance, under normal operating conditions, the
switches can support up to 24 Class 4 powered devices with the maximum
25.5W.
The x530-10GHXm and x530-18GHXm switches have two power
supplies. Each power supply provides 500W for a total PoE of 1,000W.
This is the total maximum amount of power that the switch can supply to
powered devices on the PoE++ copper ports. The number of powered
devices that the switches can support at one time will depend on their
power requirements. For instance, under normal operating conditions, the
Table 9. IEEE Powered Device Classes
Class
Maximum Power Output
from a Switch Port
PD Power Range
0 15.4W 0.44W to 13.0W
1 4.0W 0.44W to 3.84W
2 7.0W 3.84W to 6.49W
3 15.4W 6.49W to 13.0W
4 30.0W 13.0W to 25.5W
5 45.0W 40.0W (4-pair)
6 60.0W 51.3W (4-pair)
7 75.0W 62.0W (4-pair)
8 90.0W 71.3W (4-pair)
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