Cisco Nexus 7000 Series Power Supply Modules - Sourcetech

Data SheetTable 2.Available Output Based on Input PowerNumber of Inputs Input Power* Output PowerSingle input 220V 3750WDual input 220V 7500W* Only a high line input is supported.Cisco Nexus 7000 Series Power Supply RedundancyThe Cisco Nexus 7000 Series Chassis supports multiple load-sharing, fault-tolerant, and hotswappablepower supplies. As few as just one power supply can be used to operate a chassis.Using multiple power supplies provides additional power capacity and resilience after failure of thepower supply, the generating supply itself, or a facility component such as a Uninterruptible PowerSupply (UPS) or a circuit breaker.Cisco Nexus 7000 Series systems can operate in four user-configurable power-redundancymodes, summarized in Table 3, to meet the redundancy needs of the environment.Table 3.Power Redundancy ModesRedundancy ModeCombinedPower supply redundancy(N+1)Input source redundancy(grid redundancy)Power supply and inputsource redundancy(full redundancy)DescriptionNo redundancy; power available to the system is the sum of power outputs of all powersupplies in the chassisGuards against failure of one of the power supplies; power available to the system is thesum of the two least-rated power suppliesGuards against failure of one input circuit (grid); for grid redundancy, each input on thepower supply is connected to an independent AC feed, and power available to the system isthe minimum power from either of the input sources (grids)System default redundancy mode; guards against failure of either one power supply or oneAC grid, and power available is always the minimum of input source and power supplyredundancyThe total amount of power available to the Cisco Nexus 7000 Series system depends on the typesof power supplies installed, the number of connected inputs, and the configured power supplyredundancy mode. Table 4 shows the maximum available power for each redundancy mode forthe 6.0kW and 7.5kW power supplies.Table 4.Maximum Total Output Power by Redundancy ModePower Supply Type6.0kWNumber of Power Supply Redundancy ModePowerSupplies Combined N+1 Grid Full1 6000W 6000W* 6000W* 6000W*2 12,000W 6000W 6000W 6000W3 18,000W 12,000W 9000W 9000W4 24,000W 18,000W 12,000W 12,000W7.5kW1 7500W 7500W* 7500W* 7500W*2 15,000W 7500W 7500W 7500W3 22,500W 15,000W 11,250W 11,250W4 30,000W 22,500W 15,000W 15,000WNote: A maximum of three power supplies are supported on the Cisco Nexus 7000 Series 10-slot Switch and four power supplies on the Cisco Nexus 7000 Series 18-slot Switch.© 2008-2009 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 3 of 8