Step
Press the release latch and slide the PSU out of the system by using the PSU handle.
Next step
Install the DC PSU.
Installing DC power supply unit
Prerequisites
WARNING:
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.
Step
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
.
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).
WARNING:
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.
CAUTION:
Wire the unit with copper only, unless otherwise specified, use only 10 American Wire Gauge (AWG) wire rated
minimum 90ºC for source and return. Protect the –(48–60) V DC (1 wire) with a branch circuit over-current protection rated 50
A for DC with a high interrupt current rating.
CAUTION:
Connect the equipment to a –(48–60) V DC supply source that is electrically isolated from the AC source (reliably
grounded –(48–60) V DC SELV source). Ensure that the –(48–60) V DC source is efficiently secured to earth (ground).
NOTE:
A readily accessible disconnect device that is suitably approved and rated shall be incorporated in the field wiring.
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Installing and removing system components
