Power supply units
NOTE:
For more information, see the PowerEdge T440 Technical Specs at
.
CAUTION:
If two PSUs are installed, both the PSUs must have the same type of label. For example,
Extended Power Performance (EPP) label. Mixing PSUs from previous generations of PowerEdge servers is
not supported, even if the PSUs have the same power rating. Mixing PSUs will result in mismatch condition or
failure to turn the system on.
NOTE:
When two identical PSUs are installed, power supply redundancy (1+1 – with redundancy or 2+0 – without
redundancy) is configured in system BIOS. In redundant mode, power is supplied to the system equally from both PSUs
when Hot Spare is disabled. When Hot Spare is enabled, one of the PSUs is put into the sleep mode when system utilization
is low in order to maximize efficiency.
NOTE:
If two PSUs are used, they must be of the same maximum output power.
Removing a power supply unit blank
Prerequisites
Follow the safety guidelines listed in
.
Steps
If you are installing a second power supply unit, remove the power supply unit blank in the bay by pulling the blank outward.
CAUTION:
To ensure proper system cooling, the power supply unit blank must be installed in the second power
supply unit bay in a non-redundant configuration. Remove the power supply unit blank only if you are installing a
second power supply unit.
Figure 79. Removing a power supply unit blank
Next steps
Install the second power supply unit blank.
Installing a power supply unit blank
Prerequisites
1. Follow the safety guidelines listed in
.
NOTE:
Install the power supply unit (PSU) blank only in the second PSU bay.
Steps
Align the PSU blank with the PSU slot and push it into the PSU slot until it clicks into place.
Installing and removing system components
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