HP ProCurve 2520 Planning And Implementation Manual page 108

Planning and Implementation for the 3500 Switches
Planning Your PoE Configuration
The table in this example configuration shows the PoE power available for
the HP ProCurve 3500-48-PoE switch.
3500- 48 port
switches
620 RPS/EPS
Figure 8-4. Example of two HP ProCurve 3500-48-PoE Switches connecting to a
Internal PoE
Power Supply
Internal plus
External PoE
power Supply
External PoE
Power Supply
(failed Internal
Power Supply)
Each of the switches can receive full redundant power from the HP ProCurve
620 RPS/EPS should one of the internal power supplies fail. The lowest loaded
bank of ports (1-24 or 25-48) has 22 watts reserved. That power is available
for use by the two highest priority ports in the bank, (in a default configuration
ports 1 and 2, or 25 and 26).
8-6
HP ProCurve 620 External and Redundant Power Supply (J8696A)
Source of Watts
Power Available
398
398 + 388
388
(22 W is
reserved for
either ports
1-24 or 25-48)
# of Ports Powered and
Average watts/Port
25 @ average 15.4 W each
48 @ average 7.5 W each
48 @ average 4.0 W each
48 @ average 15.4 W each
25 @ average 15.4 W each
48 @ average 7.5 W each
48 @ average 4.0 W each
Redundant # of Ports
Powered and Average
watts/Port
None
24 @ average 15.4 W each
48 @ average 7.5 W each
None