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

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Planning and Implementation for the HP 3500-PoE yl Switches
Planning the PoE or PoE+ Configuration
The table in this example configuration contains entries that show the PoE+
power available for the HP 3500-48G-PoE+ yl Switch.
Figure 11-8. Example of an HP 3500-48G-PoE+ yl Switch connecting to an
HP 630 External and/or Redundant Power Supply (J9443A)
1
The HP 630 RPS/EPS power supply is rated at 398 watts, however, 382 watts are supplied to
the switch due to line loss on the EPS cable.
The switch can be supplied with power should either part of the internal power
supply fail. The HP 630 RPS/EPS can supply system power to keep the switch
powered on and PoE+ power to supply the attached PoE+ devices with power
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).
HP 3500yl 24 port switch
HP 630 RPS/EPS
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
398 12 @ average 30 W each
25 @ average 15.4 W each
48 @ average 7.5 W each
48 @ average 4.0 W each
None
Internal plus
External PoE+
power Supply
1
398 + 382
1 - 24 25 - 48
24 @ average 30 W each
48 @ average 15.4 W each
12 @ average 30 W each
24 @ average 15.4 W each
48 @ average 7.5 W each
External PoE+
Power Supply
(failed Internal
Power Supply)
1
382
(22 W is
reserved for
either ports
1-24 or 25-48)
12 @ average 30 W each
25 @ average 15.4 W each
48 @ average 7.5 W each
48 @ average 4.0 W each
None