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3. Disconnect the safety ground wire.
Steps
Press the release latch and slide the PSU out of the system by using the PSU handle.
Next steps
1.
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. Connect the safety ground wire.
2. 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.
3. 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 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.
Safety instructions
on page 27.
Installing and removing system components
47
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