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.
Related link
Removing a power supply unit blank
Prerequisite
Follow the safety guidelines listed in
Step
If you are installing a second PSU, remove the PSU blank in the bay by pulling the blank outward.
CAUTION:
To ensure proper system cooling, the PSU blank must be installed in the second PSU bay in a non-redundant
configuration. Remove the PSU blank only if you are installing a second PSU.
Figure 76. Removing a power supply unit blank
Next step
Install the second PSU.
Related link
Installing redundant power supply unit
Installing a power supply unit blank
Prerequisites
1
Follow the safety guidelines listed in
2
Install the power supply unit (PSU) blank only in the second PSU bay.
Step
Align the PSU blank with the PSU slot and push it into the PSU slot until it clicks into place.
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Dell EMC PowerEdge T440 Installation and Service Manual
Installing and removing system components
