Installation guide

Part 1: zl series chassis power
supply selection (PoE)
2
The HP ProCurve Switch 8200zl/5400zl/3500
series can power any device that adheres to the IEEE
802.3af (PoE) standard; additionally, the 8200zl and
5400zl series can power any device that adheres
to the IEEE 802.3at (PoE+) standard. The switches
will automatically detect how much power is needed
when a compatible device is plugged into the port.
Throughout this document, PoE and PoE+ will be
referred to as PoE, except where there are distinct
differences between PoE and PoE+ functionality.
The internal power supply for the HP ProCurve 3500
series switches provides both the system power and
PoE power. There are three different power supplies
available for the HP ProCurve Switch 8200zl/5400zl
series. These power supplies provide system power
(the power needed to run the switch itself) and PoE/
PoE+ power (the power sent down the Ethernet cable
to power the device at the other end). The difference
between the power supplies is the amount of PoE
power or PoE+ power available from the supply.
Power
supply
12 V
system
power
50 V
PoE
power
54 V
PoE+
power
Power
supply
total
J8712A 100–127 V
200–240 V
600 W
600 W
273 W
273 W
–
–
875 W
875 W
J8713A 200–240 V 600 W 900 W – 1500 W
J9306A 110–127 V
200–240 V
600 W
600 W
–
–
300 W
900 W
900 W
1500 W
These differences will be discussed in Step 4 of the
procedure following.
It is important to plan for peak PoE power needs
so that sufficient power is available in the switch.
When the peak power needs of the powered devices
(PDs) connected to the switch exceed the PoE power
available from the supplies, the PoE power priority in
the switch is used to determine which ports lose PoE
power. Consult the switch manual for a discussion of
the PoE power priority capability. Ports that lose their
PoE power will not be powered again to prevent them
from turning on and off, unless the loss of power was
due to a power supply failure. To avoid this situation,
use this guide to correctly size the power supplies.
Choosing the number and type of supplies that are
best for your solution is a four-step process.
Step 1: Determine your initial PoE
power needs
Count the number of PDs and the PoE peak power
each consumes. The actual peak power needed
by a powered device should be available in the
documentation or data sheet for that device. The
8200zl, 5400zl, and 3500 series switches can
allocate actual PD power rounded up to the nearest
watt. Add up the total wattage needed. Also add
22 W for each PoE and PoE+ module in the chassis.
The first PD plugged into each module will release 17
W of this module’s allotment back to the switch PoE
power pool. For this reason, it is recommended to
have at least one PD plugged into each PoE module
as PDs are added to the switch.