Owners Manual

82
PSUs
Your system supports 1100 W (for dual-node systems) or 1600 W (for single-node systems) AC redundant
PSUs:
When two identical PSUs are installed, the PSU configuration is redundant (1 + 1) for each server sled. In
redundant mode, power is supplied to the system equally from both PSUs to maximize eciency.
NOTE: If two PSUs are used, they must be of the same type and have the same maximum output
power.
NOTE: For AC PSUs, use only PSUs with the Extended Power Performance (EPP) label on the back.
Mixing PSUs from previous generations of Dell servers can result in a PSU mismatch condition or
failure to turn on.
Removing a redundant PSU
Prerequisites
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 PSU for normal operation. On power-redundant systems,
remove and replace only one PSU at a time in a system that is powered on.
CAUTION: The replacement service time for redundant PSUs when the system is operating is two
minutes.
1. Ensure that you read the Safety instructions.
2. Disconnect the power cable from the power source.
3. Disconnect the power cable from the PSU and remove the straps that bundle and secure the system
cables.
NOTE: You may have to unlatch and lift the optional cable management arm if it interferes with PSU
removal. For information about the cable management arm, see Installing the cable management
arm (CMA).
Steps
Press the release latch and pull the PSU straight out to release it from the chassis.