94 Installing System ComponentsPower SuppliesYour system supports two 1100 W power supply modules.If two power supplies are installed, the second power supply provides hot-swappable, power redundancy. In redundant mode, the system distributes thepower load across both power supplies to maximize efficiency. When a powersupply is removed with the system powered on, the full power load is pickedup by the remaining power supply. Table 3-1 lists the power supplyredundancy modes.Removing a Power SupplyCAUTION: The system requires one power supply for normal operation. Onpower-redundant systems, remove and replace only one power supply at a time ina system that is powered on.1 Disconnect the power cable from the power supply and remove the Velcrostraps that bundle and secure the system cables.NOTE: You may have to unlatch and lift the optional cable management arm ifit interferes with power-supply removal. For information about the cablemanagement arm, see the system’s rack documentation.2 Press the release latch and pull the power supply straight out to release itfrom the power distribution board and clear the chassis.If you are permanently removing the power supply, you must install apower supply blank to ensure proper system cooling. See "Installing thePower Supply Blank" on page 96.Table 3-1. Power Supply Redundancy ModesNumber of Power Supplies Redundancy Mode System Configuration1 1+0 Nonredundantconfiguration2 1+1 Redundant configuration
