Power Supply Unit - Dell EMC PowerEdge R940 Installation And Service Manual

Figure 85. Installing the optional IDSDM/vFlash card
Next steps
1 Install the micro SD cards.
NOTE: Re-install the micro SD cards into the same slots based on the labels you had marked on the cards during
removal.
2 Follow the procedure listed in

Power supply unit

The power supply unit (PSU) is an internal hardware component which supplies power to the components in the system.
Your system supports one of the following:
• Two 2400 W, 2000 W, 1600 W, or 1100 W AC power supply units (PSUs)
• Two 1100 W DC PSUs
• Two 1100 W Mixed Mode HVDC PSUs
NOTE: The PowerEdge R940 system supports hot swappable PSUs. For more information, see the Technical specifications
section.
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. This results in a PSU mismatch condition or failure to turn the system on.
NOTE: Titanium PSU is nominally rated for 200 V AC to 240 V AC input only.
After working inside your system.
Installing and removing system components 133