HP ProCurve zl Series Planning And Implementation Manual page 43

Figure 4-14. Example of a 5412zl with three power supplies (one J8712A and two
This configuration is an example of three power supplies one J8712A
supplying 273 watts and two J8713As supplying 1800 watts for a maximum of
2073 watts. Therefore a total of 134 ports can be powered at 15.4 watts each.
Source of Watts
Power Available
Three Internal 2073 (without
PoE Power redundancy)
Supplies: one
J8712A two
J8713As
In this example, one J8713A could be held in reserve to provide redundant
power for the other J8713A since they are equal in power. However if the
J8712A should fail there would be no redundancy for that power supply.
Unless you wanted to borrow power from the reserve J8713A. If this is done
though and the primary J8713A fails, there will not be enough power left over
to fully backup the failed J8713A.
Front
J8713A)
# of Ports Powered and
Average Watts/Port
• 134 @ average 15.4 W each
• 288 @ average 7.0 W each
• 288 @ average 4.0 W each
Planning and Implementation for the Series 5400zl Switch
Planning Your PoE Configuration
273 Watts
for PoE
900 Watts
for PoE
Redundant # of Ports Powered and
Average Watts/Port
• 58 @ average 15.4 W each with a J8713A in reserve
• 128 @ average 7.0 W each with a J8713A in reserve
• 225 @ average 4.0 W each with a J8713A in reserve
900 Watts
for PoE
Back
4-19