HP procurve J8164A - Manual (Page 12)

Operatin
g Rule
s
Operating Rules
External Switch Power
Operating Characteristics.
The HP 600 RPS/EPS has six RPS ports, each of which can provide redundant
+12V power to a connected switch, but only one port can provide this
power at a given time
. If a switch with no AC power is connected to an
operating HP 600 RPS/EPS, it will receive power if power is available (no
higher priority port is already using the RPS power).
If the power to a switch fails, power is provided from the HP 600 RPS/EPS, if
it is available, that is, if the HP 600 RPS/EPS is not already providing power to
a higher priority switch. If two or more devices fail, priority goes to the device
plugged into the lower numbered port on the HP 600 RPS/EPS unit. Conse­
quently the most important switch should be plugged into port one on the HP
600 RPS/EPS. In this state, the “Connected” LED should be ON, and the “Power
Status” LED should be BLINKING on the lower priority RPS port not supplying
power. (For further information refer to the Installation and Getting Started
Guide
that came with your HP 600 RPS/EPS unit.)
External Switch Power
The HP 600 RPS/EPS provides external PoE power to up to two switch devices
through two EPS ports. The amount of PoE power provided depends on how
many switches (one or two) are connected to these ports on the HP 600 RPS/
EPS. For example, you could connect one EPS port to a Switch 2650-PWR and
connect the other EPS port to an HP ProCurve Switch xl PoE Module.
EPS Power Allocation
The HP 600 RPS/EPS has a maximum PoE power supply of 368 watts that can
supply power to connected switch devices either as the primary source of PoE
power, such as with the Switch xl PoE Module, or as a level of additional PoE
power for devices that have internal PoE power supplies. For the Switch 2626-
PWR the external PoE power is redundant power, used if the internal PoE
power supply fails. However, because the HP 600 RPS/EPS has two EPS ports
and can be connected to two switches, the supplied PoE power to each switch
is cut in half. In other words, each switch only receives 184 watts of PoE power.
The same holds true, for example, if you have connected one EPS port to a
Switch 2626-PWR and the other EPS port to an HP ProCurve Switch xl PoE
Module. The 368 watts from the HP 600 RPS/EPS will be split between the two
switch devices.
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