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All electrical wiring must comply with applicable local or national codes and practices. Damage due to servicing that is
not authorized by Dell is not covered by your warranty. Read and follow all safety instructions that came with the
product.
CAUTION:
The system needs 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.
1. Follow the safety guidelines listed in
2. Disconnect the power wires from the power source and the connector from the PSU you intend to remove.
3. Disconnect the safety ground wire.
4. Unlatch and lift the optional cable management arm if it interferes with PSU removal. For information about the cable management
arm, see the system's rack documentation at https://www.dell.com/poweredgemanuals.
Steps
Press the release latch and slide the PSU out of the system by using the PSU handle.
Next steps
Install the DC
PSU.
Installing DC power supply unit
Prerequisites
NOTE:
For equipment using –(48–60) V DC power supply units (PSUs), a qualified electrician must perform all
connections to DC power and to safety grounds. Do not attempt connecting to DC power or installing grounds yourself.
All electrical wiring must comply with applicable local or national codes and practices. Damage due to servicing that is
not authorized by Dell is not covered by your warranty. Read and follow all safety instructions that came with the
product.
1. Follow the safety guidelines listed in
2. For systems that support redundant power supply units (PSUs), ensure that both the PSUs are of the same type and have the same
maximum output power.
NOTE:
The maximum output power (shown in watts) is listed on the PSU label.
Steps
Slide the PSU into the system until the PSU is fully seated and the release latch snaps into place.
Next steps
1. If you have unlatched the cable management arm, relatch it. For information about the cable management arm, see the system's rack
documentation at https://www.dell.com/poweredgemanuals.
2. Connect the safety ground wire.
3. Install the DC power connector in the PSU.
CAUTION:
When connecting the power wires, ensure that you secure the wires with the strap to the PSU handle.
4. Connect the wires to a DC power source.
NOTE:
When installing, hot-swapping, or hot-adding a new PSU, wait for 15 seconds for the system to recognize the
PSU and determine its status. The PSU status indicator turns green to signify that the PSU is functioning properly.
Wiring instructions for a DC power supply unit
Your system supports up to two –(48–60) V DC power supply units (PSUs).
NOTE:
For equipment using –(48–60) V DC power supply units (PSUs), a qualified electrician must perform all
connections to DC power and to safety grounds. Do not attempt connecting to DC power or installing grounds yourself.
All electrical wiring must comply with applicable local or national codes and practices. Damage due to servicing that is
156
Installing and removing system components
Safety instructions
on page 71.
Safety instructions
on page 71.
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