2. Install a power supply and an (optional) second power supply
Skip this step if a power supply (sold separately) is already installed and if you are not installing an optional
second power supply.
Three types of power supplies can be installed:
• Aruba 250W Power Supply (JL085A, Aruba X371 250W 100-240VAC to 12VDC PS) is used with the non-
PoE switches and is keyed so that it cannot be used in the PoE switches.
The 250W 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, redundant power can be supplied if there is loss of one of the AC power sources.
• Aruba 680W PoE+ Power Supply (JL086A, Aruba X372 680W 100-240VAC to 54VDC PS) used with the
PoE switches and is keyed so that it cannot be used in the non-PoE switches.
• Aruba 1050W PoE+ Power Supply, (JL087A, Aruba X372 1050W 100-240VAC to 54VDC PS) is used with
the PoE switches and is keyed so that it cannot be used in the non-PoE switches.
The 680W and 1050W power supplies provide two types of power to the PoE switches:
• The 680W and 1050W power supplies provide 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, redundant power can be supplied if there is loss of one of the AC power sources.
• The power supplies provide PoE power to the switch. If one of the power supplies fail, the second power
supply will supply the needed PoE power to continue PoE operation. For the 48-port switches, the PoE power
from the second power supply is additional power made available to the switch ports.
• It is important to understand the PoE power requirements of the switches. If the PoE power is not planned and
implemented correctly, and an internal PoE power supply fails, the end devices connected to the switch ports
may not receive power.
For power supply installation or replacement information, see the Aruba 3810M/2930M Switch Power Supply
Quick Setup Guide and Safety/Regulatory Information at https://www.hpe.com/networking/ResourceFinder.
For further information regarding the power supply PoE capabilities, see the HPE Power over Ethernet (PoE)
Planning and Implementation Guide on the Hewlett Packard Enterprise website at http://www.hpe.com/
networking/support.
Chapter 3 Installing the switch 37
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