If the power requirements for attached powered devices (PDs) exceed the total power
budget of the switch, the PoE power to the device on the highest-numbered active PoE
port is disabled to make sure that the devices connected to the higher-priority,
lower-numbered PoE ports are supported first.
Although a device might be listed as an 802.3bt PoE++-powered or 802.3at
PoE+-powered device, it might not require the maximum power limit that is specified
by its IEEE standard. Many devices require less power, allowing all PoE ports to be active
simultaneously when the devices correctly report their PoE class to the switch.
The following table shows the standard power ranges, calculated with the maximum
cable length of 328 feet (100 meters). If a device receives insufficient PoE power from
the switch, consider using a shorter cable.
Table 11. PoE classes and PoE power allocations
Power Delivered to
the PD
Maximum Power
Reserved for the PD
Class DescriptionCompatible PoE
Standard
Device
Class
0.44W–15.8W15.4WDefault power (full)PoE, PoE+, and PoE++0
0.44W–3.84W4.0WVery low powerPoE, PoE+, and PoE++1
3.84W–7.2W7.0WLow powerPoE, PoE+, and PoE++2
6.49W–15.9W15.4WMid powerPoE, PoE+, and PoE++3
12.95W–30.8W30.0WHigh powerPoE+ and PoE++4
25.5W–47.0W45.0WUltra high powerPoE++5
51.0W–64.4W60.0WUltra high powerPoE++6
62.0W–81.1W75.0WUltra high powerPoE++7
71.0W–96.5W90.0WUltra high powerPoE++8
For more information about PoE, see the installation guide and user manuals, which
you can download by visiting netgear.com/support/download.
Auxiliary power supplies
An internal power supply is preinstalled in all models. Some models provide one or
more power supply unit (PSU) bays in which you can install optional auxiliary power
supplies (APSs).
The switch supports the following APSs:
•
APS350W: +54.5VDC, 6.4A DC output
Hardware Installation Guide42Hardware Overview
Fully Managed Switches M4350 Series
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