Foundry Hardware Installation Guide for the FES, FESX, and FWSX
2 - 20 © 2008 Foundry Networks, Inc. December 2008
AC Power Supplies
Figure 2.14 shows a rear view of a FastIron Stackable device containing one AC power supply. The power supply
installed in your system may vary from the one shown here, which does not have an ON/OFF switch.
Figure 2.14 AC Power Supply without ON/OFF Switch
Figure 2.15 shows a rear view of a FastIron Stackable device containing one AC power supply. The power supply
installed in your system may vary from the one shown here, which has an ON/OFF switch.
Figure 2.15 AC Power Supply with ON/OFF Switch
DC Power Supplies
Figure 2.16 shows a rear view of a FastIron Stackable device containing one DC power supply.
Figure 2.16 RPS5DC power supply
About Redundant Power Supplies and Power Supply Failure
A FastIron compact switch with redundant power supplies can maintain full operation when one power supply fails.
Power supply failure can be a failure of the supply itself or the office power grid connected to the power supply.
What Happens When a FastIron (non-POE) Power Supply Fails
In a FastIron compact switch (non-POE) with redundant power supplies, power consumption is equally distributed
between both power supplies, within a certain percentage depending on power load or power supply type.
However, when one power supply fails, the power load is carried by the remaining power supply.
What Happens When a FastIron POE Power Supply Fails
A FastIron POE compact switch with dual power supplies may not provide redundancy, depending on how much
power the POE ports are consuming. In a POE device with redundant power supplies, power consumption is
Plastic Latch
AC Power
Connector
Power Supply (standard)
Plastic Latch
AC Power
Connector
On/Off Switch
AC Cable
Retainer
Handle
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