Provisioning Power For Poe; Maximum Poe Power - HP ProCurve zl Series Planning And Implementation Manual

Operating Rules

Provisioning Power for PoE

Provisioning Power for PoE
Both the 5400zl and the 3500yl switches support an external power supply that
can provide either redundant or extra PoE power. It is important to understand
how PoE power is provisioned in order to use these external power supplies
efficiently. The following sections will discuss this in detail.
By installing a second power supply in the 5406zl or a third power supply in a
5412zl, depending on how many PoE ports are being supplied with power, the
switch can have redundant power if one power supply fails. A Power Supply
Shelf can also be connected to the 5400zl switches to provide extra or
redundant PoE power.
For example, if the 5406zl has two 24-port PoE modules (J8702A) installed,
and all ports are using 15.4 watts, then the total wattage used is 739.2 watts
(48 x 15.4). Therefore to supply the necessary PoE wattage a J8713A power
supply is installed in one of the power supply slots. Then to gain redundant
power a second J8713A must be installed in the second power supply slot. If
the first power supply fails, then the second power supply can supply all
necessary power.
Threshold - Refer to the Management and Configuration Guide which is on
the ProCurve Web site, www.procurve.com. (See

Maximum PoE Power

The Switch 3500yl-24G-PWR provisions (allocates power to) ports 1-24 with
398 watts of power for PoE applications compatible with the IEEE 802.3af
standard and some pre-standard devices. The Switch 3500yl-48G-PWR
provisions ports 1-48 with 398 watts. This reduces the average per port wattage
by half as compared to the Switch 3500yl-24G-PWR.
An external power supply, the 620 RPS/EPS (J8696A) can be connected to
either of the 3500yl switches to provide redundant or extra PoE power. The
620 RPS/EPS can be connected to up to two switches and provide 388 watts
to each switch.
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page 1-4.)