HP ProCurve 2520 Planning And Implementation Manual page 141

71 ports can receive up to
15.4 watts of PoE power
Figure 10-13.Example of a 5412zl with four power supplies, J8712A
In this example (Figure 10-13) there are four power supplies supplying 273
watts each for a maximum of 1092 watts.
All three modules can be used or six and a half modules (145 ports) at 7.5 watts
per port.
Source of Power Watts Available # of Ports Powered and Average watts/
Four Internal 1092 (without
Power Supplies redundancy)
(J8712A)
Two power supplies could be used to supply PoE power at 546 watts and the
other two power supplies could be held in reserve as redundant power
supplies if the primary power supplies fail. If two power supplies are
connected to different power sources, they could backup the other two in case
of failure. With this option the user must manage the PoE usage in order to
maintain redundancy.
Front
Port
71 @ average 15.4 W each
145 @ average 7.0 W each
273 @ average 4.0 W each
Planning and Implementation for the 5400zl/8200zl Switches
273 watts
for PoE
273 watts
for PoE
Redundant # of Ports Powered and
35 @ average 15.4 W
72 @ average 7.5 W each
136 @ average 4.0 W each
Configuration Examples
273 watts
for PoE
273 watts
for PoE
Back
Average watts/Port
10-21