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Chapter 55 - 6Changing a power supplyThe VIPRION platform can contain up to four power supplies. These powersupplies can operate in one of two modes: 120V and 220V, depending onthe power source to which the power supplies are connected.The VIPRION platform supports both symmetric and asymmetric powerredundancy. Symmetric redundancy requires an even number of powersupplies, with half supplied by one power feed and half by another. If onepower feed fails, the system is unaffected because the remaining suppliesare sufficient for the entire load. With asymmetric redundancy (n + 1), it isnot possible to split the supplies evenly between the power feeds. As aresult, if one power feed fails, the whole system can go down. In either typeof redundancy, if a single power supply fails, the system is unaffected by theloss of a single supply.For details about power requirements, see AC power requirements, on page9-2.Adding a power supplyThe platform can contain a total of four power supplies. By default, theplatform includes four power supplies, one installed in each power supplybay.NoteYou do not need special tools to replace a power supply.To add a power supply1. Using the indentations on either side of the LCD component, pullthe LCD component off the platform.With the LCD component removed, you can see the power suppliesand the available power supply bays.2. Slide the new power supply into the appropriate empty powersupply bay.3. Lower the power supply eject lever to fully seat the power supply inits bay.4. Secure the power supply in its bay using the fastener attached to themiddle of the power supply eject lever.5. Attach the power cord for the new power supply to the back of theunit, using the corresponding power supply connector.6. Replace the LCD component. |
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