Poe Power Requirements - HP ProCurve 2520 Planning And Implementation Manual

Operating Rules
Provisioning Power for PoE
PoE Allocation Using LLDP Information
See

PoE Power Requirements

PoE Only Modules.
There are two PoE modules for the 5400zl/8200zl chassis and they have the
same requirement for reserving 22 watts (see above). There are 22 watts per
module that is always held in reserve.
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Each group of 24 ports is its own management group and needs to have a
minimum allocation associated with it in order to properly detect PDs and
bring them online.
Each group of 24 ports will have a PoE power allocation of at least 22 watts.
This 22 watts must be subtracted from the total wattage when figuring how
many PoE devices to connect to which ports on a switch or module. In order
to be able to allocate the reserved 22 watts, either use the ports it is allocated
to, or the PoE power to all ports on the associated module must be turned off.
PoE/PoE+ Modules.
There are three zl modules that can provide PoE/PoE+ power to the 5400zl/
8200zl switches. A minimum of 17 watts is required to power up a port used
for PoE; a minimum of 33 watts is required to power up a port used for PoE+.
There is a maximum limit of 370 watts of PoE/PoE+ power available per slot.
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2-22
page 2-15.
HP ProCurve Switch zl 24-Port 10/100/1000 PoE Module (J8702A)
HP ProCurve Switch zl 20-Port 10/100/1000 + 4-port Mini-GBIC Module
(J8705A)
HP ProCurve 24-Port 10/100/1000 PoE+ zl Module (J9307A)
HP ProCurve 20-Port 10/100/1000 PoE+/4 Port mini-GBIC zl Module
(J9308A)
HP ProCurve 24-Port 10/100 PoE+ Module (J9478A)