Dell EMC PowerEdge R640 WNW58 Installation And Service Manual

Next stepsInstall the PSU or the PSU blank.Installing a power supply unitThe procedure for installing AC and DC PSUs is identical.Prerequisites1. Follow the safety guidelines listed in Safety instructions on page 34.2. For systems that support redundant PSU, ensure that both the PSUs are of the same type and have the same maximumoutput power.NOTE: The maximum output power (shown in watts) is listed on the PSU label.StepsSlide the PSU into the system until the PSU is fully seated and the release latch snaps into place.Figure 115. Installing a power supply unitNext steps1. If you have unlatched the cable management arm, relatch it. For information about the cable management arm, see thesystem’s rack documentation at https://www.dell.com/poweredgemanuals.2. Connect the power cable to the PSU, and plug the cable into a power outlet.CAUTION: When connecting the power cable to the PSU, secure the cable to the PSU with the strap.NOTE: When installing, hot swapping, or hot adding a new PSU, wait for 15 seconds for the system to recognize thePSU and determine its status. The PSU redundancy may not occur until discovery is complete. Wait until the new PSU isdiscovered and enabled before you remove the other PSU. The PSU status indicator turns green to signify that the PSUis functioning properly.Removing a DC power supply unitPrerequisitesNOTE: For equipment using –(48–60) V DC power supply units (PSUs), a qualified electrician must perform all connectionsto DC power and to safety grounds. Do not attempt connecting to DC power or installing grounds yourself. All electricalInstalling and removing system components 123