HP procurve J8164A - Manual (Page 13)

Operating Rules
External Switch Power
Maximum PoE Power
The Switch 2626-PWR provisions (allocates power to) ports 1-24 with 406
watts of power for PoE applications compatible with the IEEE 802.3af stan­
dard. The Switch 2650-PWR provisions ports 1-48 with 406 watts. This reduces
the per port wattage by half as compared to the Switch 2626-PWR. However,
by connecting an HP 600 RPS/EPS, you can optionally provision ports 25-48
with 368 watts of external PoE power, thereby bringing the per port wattage
up to 15.4 watts per port, unless you have the other EPS port connected to an
HP ProCurve PoE device. In this case you cannot provision the full 368 watts
to the Switch 2650-PWR, only half, 184 watts.
Table 2-1. Maximum Power Allocations
PoE Power PoE for Switch 2626-PWR PoE for Switch 2650-PWR HP ProCurve Switch xl
Sources PoE Module
Op
era
tin
g Ru
les
Internal
Only 406 watts available to ports
1-24. 406 watts available to ports 1-48. No internal PoE power.
Internal
and EPS redundant 368/184* watts
available to ports 1-24. Only if
the internal power supply
fails. 406 watts available to ports 1-24
(provided by the internal source).
368/184* watts available to ports
25-48 (provided by the EPS source). 368/184* watts available to ports
1-24 from the EPS only.
EPS Only 368/184* watts available to
ports 1-24. (The EPS provides
PoE power to ports 1-24 only
if the internal power supply
fails.) The internal power supply has
failed, and the EPS provides 368/
184* watts to ports 1-48. Note that
38 watts of this power are always
allocated exclusively to ports 1 and
2, or 25 and 26.) See
page 3-5 .
368/184* watts available to ports
1-24.
* If both EPS ports on the HP 600 RPS/EPS are connected to switches, each switch
can receive 184 watts of power. If a single switch is connected to the EPS ports,
that switch can receive 368 watts.
PoE Power With and Without EPS
It is important to understand the PoE power requirements of these switch
devices because if the PoE power is not planned and implemented correctly,
end devices connected to the PoE switch ports may not receive power if an
internal switch PoE power source failure occurs.
2-3