HP Power over Ethernet (PoE/PoE+) Planning and Implementation Guide

7-8
Planning and Implementation for the HP 2620-PoE+ Switches
Planning the PoE Configuration
Figure 7-4. Example of a HP 2620-48-PoE+ Switch
For example, the switch starts with 364 watts. It takes 360.0 watts to fully
provision 12 ports at 30 watts per port (plus 4 watts to account for load
fluctuations), leaving the pool of available watts empty.
Since a port requires 33 watts to power up a PoE+ device, there is not enough
available power to power another device.
The table in this example configuration contains entries that show the PoE+
power available for the HP 2620-48-PoE+ Switch when connecting to an
external power supply.
Figure 7-5. Example of a HP 2620-48-PoE+ Switch connecting to an
HP630 RPS/EPS
All 24 ports can receive up to 15.4
watts of PoE power
or
48 ports can receive up to 7.5
watts of PoE power
12 ports can receive up to 30
watts of PoE+ power
or
Source of
Power
Watts
Available
Number of Ports Powered
and Average watts/Port
Redundant Number of Ports
Powered and Average watts/
Port
Internal PoE+
Power
Supply
364 12 @ average 30 W each
24 @ average 15.4 W each
48 @ average 7.5 W each
48 @ average 4.0 W each
None
HP 2620 48-port switch
HP 630 RPS/EPS