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– When two identical power supplies are installed, the power supply configuration is redundant (1 + 1). In
redundant mode, power is supplied to the system equally from both power supplies to maximize efficiency.
– When only one power supply is installed, the power supply configuration is non-redundant (1 + 0). Power is
supplied to the system only by the single power supply.
NOTE: If two power supplies are used, they must be of the same type and have the same maximum output power.
NOTE: Titanium power supply is nominally rated for 200 VAC to 240 VAC input only.
CAUTION: Do not operate your system with only one 1100 W AC or DC power supply installed.
Removing An AC Power Supply
CAUTION: Many repairs may only be done by a certified service technician. You should only perform
troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or
telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your
warranty. Read and follow the safety instructions that came with the product.
CAUTION: The system requires one power supply for normal operation. On power-redundant systems, remove and
replace only one power supply at a time in a system that is powered on.
NOTE: You may have to unlatch and lift the optional cable management arm if it interferes with power supply
removal. For information about the cable management arm, see the system’s rack documentation.
1. Disconnect the power cable from the power source and the power supply you intend to remove and remove the
cables from the strap.
2. Press the release latch and slide the power supply out of the chassis.
Figure 40. Removing and Installing an AC Power Supply
1. connector
2. power supply
3. release latch
4. power supply handle
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