Powered Device Classes For Poe And Poe; Poe Connection Guidelines; Table 2: Poe And Poe+ Powered Device Classes - Allied Telesis AT-IS230-10GP Installation Manual

Powered Device
Classes for PoE
and PoE+
PoE Connection
Guidelines
The PoE and PoE+ standards define five powered device classes. The
classes are defined by the power requirements of the powered devices.
The classes are shown in Table 2. The IS Series switches support all five
classes.
Table 2. PoE and PoE+ Powered Device Classes
Class Usage
0 Default
1 Optional
2 Optional
3 Optional
4 Optional
Here are guidelines for connecting different types of powered devices
(PDs) on the PoE switch ports:
PoE or PoE+ devices that comply with the IEEE 802.3af and

802.3at standards support Alternatives A and can be connected to
any of the PoE twisted-pair ports.
PoE or PoE+ devices that do not comply with the standards and

only support Alternative A can also be connected to any available
twisted-pair port.
Note
Alternative B method of delivering PoE power (over strands 4, 5, 7
and 8) is not supported.
Non-PoE devices can be connected to any of the twisted-pair ports

on the switch. Ports connected to network nodes that are not PDs
(that is, devices that receive power from another power source)
function as regular Ethernet ports, without delivering power to the
device. The PoE feature remains enabled on the ports but no
power is delivered to the devices.
IS Series Industrial Ethernet Layer 2 Switch Installation Guide
Maximum Power Output
at the Switch Port
15.4W
4.0W
7.0W
15.4W
30.0W
PD Power Range
0.44W to 13W
0.44W to 3.84W
3.84W to 6.49W
6.94W to 13W
13W to 25.5W
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