Steps
1. Strip the insulation from the ends of the DC power wires, exposing approximately 13 mm (0.5 inch)
of copper wire.
WARNING: Reversing polarity when connecting DC power wires can permanently damage
the PSU or the system.
2. Insert the copper ends into the mating connectors and tighten the captive screws at the top of the
mating connector using a #2 Phillips screwdriver.
WARNING: To protect the power supply from electrostatic discharge, the captive screws
must be covered with the rubber cap before inserting the mating connector into the power
supply.
3. Rotate the rubber cap clockwise to fix it over the captive screws.
4. Insert the mating connector into the PSU.
Figure 45. Assembling the DC input power wires
1. wire RTN 2. DC power connector
3. captive screws (2) 4. rubber cap
5. DC power socket 6. wire –48 V
Removing a DC PSU
Prerequisites
WARNING: For equipment using –(48–60) V DC power supplies, 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: The system requires 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 turned on.
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