Optional) Install A Second Power Supply - HP E3800-24G-2SFP+ Installation And Getting Started Manual

8. (Optional) Install a Second Power Supply

There are two types of power supplies that can be installed:
■ HP 400W Power Supply, (J9581A, HP X311 400W 100-240VAC to 12VDC
PS) used with the non-PoE switches and is keyed so that it cannot be used
in the PoE/PoE+ switches.
The 400 W power supply provides power to operate the switch. Installing
a second power supply can provide power to the switch in case the initial
power supply fails. If the power supplies are plugged into different AC
power sources, then redundant power can be supplied in case of loss of
one of the AC power sources.
HP 1000W / 700W PoE+ Power Supply, (J9580A, HP X312 1000W
■
100-240VAC to 54VDC PS) used with the PoE/PoE+ switches and is keyed
so that it cannot be used in the non-PoE switches.
The 1000 W power supply provides two types of power to the PoE/PoE+
switches:
The 1000 W power supply provides power to operate the switch. Installing
■
a second power supply can provide power to the switch in case the initial
power supply fails. If the power supplies are plugged into different AC
power sources, then redundant power can be supplied in case of loss of
one of the AC power sources.
■ Power-over-Ethernet (PoE/PoE+) power. The power supplies, supply
PoE/PoE+ power to the switch. Should one of the power supplies fail, the
second power supply will supply the needed PoE/PoE+ power to continue
PoE operation. For the 48 port switches, the second power supply's PoE/
PoE+ power is additional power made available to the switch's ports.
For further information regarding the power supply's PoE/PoE+ capabil-
ities, see the HP Power over Ethernet (PoE/PoE+) Planning and Imple-
mentation Guide, on the HP Web site at www.hp.com/networking/support.
PoE/PoE+ Operation
It is important to understand the PoE/PoE+ power requirements of the
switches because if the PoE/PoE+ power is not planned and implemented
correctly the end devices connected to the switch ports may not receive power
if an internal switch PoE/PoE+ power supply should fail.
For further information regarding the PoE/PoE+ capabilities, see the HP
Power over Ethernet (PoE/PoE+) Planning and Implementation Guide, on
the HP Web site at www.hp.com/networking/support.
Installing the Switch
Installation Procedures
2-17