Installing Dc Power Supply Unit; Wiring Instructions For A Dc Power Supply Unit - Dell EMC PowerEdge T640 Installation And Service Manual

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 Connect the safety ground wire.
2 Install the DC power connector in the PSU.
CAUTION:
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).
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.
Input requirements
• Supply voltage: –(48–60) V DC
• Current consumption: 32 A (maximum)
Safety instructions.
When connecting the power wires, ensure that you secure the wires with the strap to the PSU handle.
Installing and removing system components 87