CAUTION:
The system needs one power supply for normal operation. On power-redundant systems, remove and
replace only one power supply at a time in a system that is powered on.
NOTE:
You may have to unlatch and lift the optional cable management arm if it interferes with power supply removal. For
information about the cable management arm, see the rack documentation of your system.
Steps
1. Disconnect the power wires from the power source and the connector from the PSU you intend to remove.
2. Disconnect the safety ground wire.
3. Press the release latch and slide the PSU out of the chassis by using the PSU handle.
Figure 79. Removing a DC PSU
1. release latch
2. power supply status indicator
3. PSU
4. power connector
5. PSU handle
Installing a 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 the Safety instructions section.
2. Follow the procedure listed in the Before working inside your system section.
3. If installed, remove the PSU blank.
4. Verify 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
1. Slide the PSU into the chassis until the PSU is fully seated and the release latch snaps into place.
NOTE:
If you have unlatched the cable management arm, relatch it. For information about the cable management arm,
see the rack documentation.
2. Connect the safety ground wire.
3. Install the DC power connector in the PSU.
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Installing and removing system components
