HP ProCurve 2520 Planning And Implementation Manual page 101

The table in this example configuration contains entries that show the PoE+
power available for the 2910al-48G-PoE+ when connecting to an external
power supply.
2910al 48 port
switches
Figure 7-4. Example of a 2910al-48G-PoE+ Switch connecting to a 630 RPS/EPS
Source of
Power
Internal PoE+
Power Supply
Internal plus
External PoE+
power Supply
External PoE+
Power Supply
(failed Internal
Power Supply)
The switch can receive redundant power from the 630 RPS/EPS should the
switch's internal power supply fail.
Planning and Implementation for the 2910al PoE+ Switches
630 RPS/EPS
Watts # of Ports Powered and
Available Average watts/Port
382 25 @ average 15.4 W each
48 @ average 7.5 W each
48 @ average 4.0 W each
382 + 382 24 @ average 30.0 W each for
a total of 720
1 - 24 25 - 48
48 @ average 15.4 W each
48 @ average 7.5 W each
48 @ average 4.0 W each
382 12 @ average 30W each for a
total of 360 W
25 @ average 15.4 W each
48 @ average 7.5 W each
48 @ average 4.0 W each
Planning Your PoE Configuration
Redundant # of Ports
Powered and Average
watts/Port
None
24 @ average 30.0 W each for
a total of 360 W
48 @ average 15.4 W each
48 @ average 7.5 W each
48 @ average 4.0 W each
None
7-5