Cisco Nexus 7000 Hardware Installation And Reference Manual page 173

Chapter 6 Installing Power Supplies
Figure 6-8 Connecting a PIU to a Power Supply and a 3- or 6-kW Power Supply for Combined Power Mode
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OL-23069-07
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3-kW DC power supply (1 to 4)
Power Interface Unit (PIU)
DC power grid
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6-kW DC power supply (1 to 4)
5 Connections for 3 kW of available power
6 Connections for 6 kW of available power
Cisco Nexus 7000 Series Hardware Installation and Reference Guide
Connecting a DC Power Supply to DC Power Sources
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