Steps1. 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 damagethe power supply or the system.2. Insert the copper ends into the mating connectors and tighten the captive screws at the top of themating connector using a #2 Phillips screwdriver.WARNING: To protect the power supply from electrostatic discharge, the captive screwsmust be covered with the rubber cap before inserting the mating connector into the powersupply.3. Rotate the rubber cap clockwise to fix it over the captive screws.4. Insert the mating connector into the power supply.Figure 48. Assembling the DC input power wires1. wire RTN 2. DC power connector3. captive screws (2) 4. rubber cap5. DC power socket 6. wire –48 VRemoving a DC power supply unitPrerequisitesWARNING: For equipment using –(48–60) V DC power supplies, a qualified electrician mustperform all connections to DC power and to safety grounds. Do not attempt connecting to DCpower or installing grounds yourself. All electrical wiring must comply with applicable local ornational codes and practices. Damage due to servicing that is not authorized by Dell is notcovered 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-redundantsystems, remove and replace only one power supply at a time in a system that is powered on.111
