Poe Overview - NETGEAR GS724TPv3 Hardware Installation Manual

24-Port Gigabit Ethernet (Hi-Power) PoE+ Smart Switch with 2 SFP Ports

PoE overview

The switch supports 24 Power over Ethernet plus (PoE+) ports. The switch can supply
up to 30W PoE+ (IEEE 802.3at) to each port. The maximum PoE power budget across
all active PoE+ ports is 190W for model GS724TPv3 and 380W for model GS724TPPv3.
Supplied power is prioritized according to the port order, up to the total power budget
of the device. Port 1 receives the highest PoE priority, while port 24 is relegated to the
lowest PoE priority.
If the power requirements for attached devices 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 is listed as an 802.3at PoE+-powered or 802.3af 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 24 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 3. PoE classes and PoE power allocations
Device Compatible PoE
Class Standard
0 PoE and PoE+
1 PoE and PoE+
2 PoE and PoE+
3 PoE and PoE+
4 PoE+ only
For more information about PoE, see the installation guide and user manual. To find
your installation guide and user manual, visit netgear.com/support/download/, enter
your model number in the search box, and click the Documentation button on the
product page.
Applications
Class Description Maximum Power
Reserved for the Device
Default power (full) 15.4W
Very low power 4.0W
Low power 7.0W
Mid power 15.4W
High power 30.0W
21
Power Delivered to the
Device
0.44W–12.95W
0.44W–3.84W
3.84W–6.49W
6.49W–12.95W
12.95W–25.5W
Hardware Installation Guide