HP ProCurve 2520 Planning And Implementation Manual page 147

Figure 10-19.Example of a 5412zl with four power supplies (two J8712A and two J8713A)
In this example (Figure 10-19) there are two J8712A and two J8713A power
supplies supplying 2892 watts for PoE usage. With this configuration, 187 ports
(or more than 7 modules) can be provisioned at 15.4 watts, or all 288 ports can
be powered at 7.0 watts each.
N o t e
HP ProCurve highly recommends that the two types of power supplies are not
mixed in the same 5412zl/8212zl chassis.
Source of Power Watts Available # of Ports Powered and Average watts/
Four Internal PoE 2892 (without
Power Supplies: redundancy)
two J8712As and
two J8713As
The reason the redundant # of ports in this table is so low is because redundant
PoE power should always be based on the smallest power supply. In this case
the smallest power supply is the 8712A providing 546 watts.
Front
Port
187 @ average 15.4 W each
288 @ average 7.5 W each
288 @ average 4.0 W each
Planning and Implementation for the 5400zl/8200zl Switches
273 watts
for PoE
900 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
900 watts
for PoE
Back
Average watts/Port
10-27