Citrix SD-WAN Platforms
Field Replaceable Units
June 19, 2020
Citrix SD-WAN field replaceable units (FRU) are components that can be quickly and easily removed
from the appliance and replaced by the user or a technician at the user’s site. The FRUs for a Citrix SD-
WAN appliance include DC or AC power supplies, solid-state or hard-disk drives, and a direct attach
cable (DAC).
Note: The solid-state or hard-disk drive stores your configuration information, and it must be
restored from a backup aer the unit is replaced.
Power supply
For appliances containing two power supplies, the second power supply is optional but recom-
mended . Some appliances can accommodate four power supplies, and require two power supplies
as a bare minimum for proper operation. As a best practice, plug in all the power supplies for
redundancy.
The appliance ships with a standard power cord that plugs into the appliance’s power supply and a
NEMA 5-15 plug on the other end for connecting to the power outlet on the rack or in the wall.
If you suspect that a power-supply fan is not working, please see the description of your platform.
On some platforms, what appears to be the fan does not turn, and the actual fan turns only when
necessary.
On each power supply, a bicolor LED indicator shows the condition of the power supply.
Electrical safety precautions for power supply replacement
Make sure that the appliance has a direct physical connection to earth ground during normal use.
When installing or repairing an appliance, always connect the ground circuit first and disconnect it
last.
Never touch a power supply when the power cord is plugged in. As long as the power cord is plugged
in, line voltages are present in the power supply even if the power switch is turned o.
Replace an AC power supply
Most Citrix SD-WAN platforms can accommodate two power supplies. Some platforms can accommo-
date four power supplies. All Citrix SD-WAN appliances function properly with a single power supply,
except the appliances that can accomodate four power supplies. These appliances need two power
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