Cisco Nexus 7000 Hardware Installation And Reference Manual page 174

Connecting a DC Power Supply to DC Power Sources
Figure 6-9 Connecting a PIU to a Power Supply and a 3- or 6-kW Power Supply for Power Supply Redundancy
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Cisco Nexus 7000 Series Hardware Installation and Reference Guide
6-20
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3-kW DC power supply (1-4)
Power interface unit (PIU)
DC power grid
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6-kW DC power supply (1-3)
5 Connections for 3 kW of available power
6 Connections for 3 kW of reserve power (power supply
redundancy at least equals the power provided by the power
supply providing the maximum amount of available power)
Chapter 6 Installing Power Supplies
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