Installing a hot-swap ac power supplyUse this information to install a hot-swap ac power supply.About this taskThe following notes describe the type of power supply that the server supportsand other information that you must consider when you install a power supply:v Before you install an additional power supply or replace a power supply withone of a different wattage, you may use the IBM Power Configurator utility todetermine current system power consumption. For more information and todownload the utility, go to http://www.ibm.com/systems/bladecenter/resources/powerconfig.html.v The server comes with one hot-swap 12-volt output power supply that connectsto power supply bay 1. The input voltage is 100-127 V ac or 200-240 V acauto-sensing.v Power supplies in the server must be with the same power rating or wattage toensure that the server will operate correctly. For example, you cannot mix550-watt and 750-watt power supplies in the server.v Power supply 1 is the default/primary power supply. If power supply 1 fails,you must replace the power supply with the same wattage immediately.v You can order an optional power supply for redundancy.v These power supplies are designed for parallel operation. In the event of apower-supply failure, the redundant power supply continues to power thesystem. The server supports a maximum of two power supplies.Statement 5CAUTION:The power control button on the device and the power switch on the powersupply do not turn off the electrical current supplied to the device. The devicealso might have more than one power cord. To remove all electrical current fromthe device, ensure that all power cords are disconnected from the power source.12Statement 872 IBM System x3550 M4 Type 7914: Installation and Service Guide
