GS980MX Series Installation Guide for Virtual Chassis Stacking
45
Powered Device
Classes
Powered devices are grouped into the nine classes listed in Table 14.
The classes are based on the amount of power the devices require. The
GS980MX/28PSm and GS980MX/52PSm switches support classes
0 to 4. The GS980MX/10HSm and GS980MX/18HSm switches support
classes 0 to 8.
Caution
When hot-swapping PoE PD Classes 5-8, the 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 GS980MX/28PSm and GS980MX/52PSm switches have one power
supply. The power supply provides 370 W. This is the total maximum
amount of power that the switch can supply to powered devices on the
PoE+ twisted pair 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 12 Class 4 powered devices with the maximum 25.5W.
The GS980MX/10HSm switch has one power supply. It can supply 500W
of PoE power. This is the total maximum amount of power that the switch
can supply to powered devices on the eight PoE++ twisted pair ports. The
number of powered devices that the switch can support at one time will
depend on their power requirements. For instance, under normal operating
Table 14. 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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