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Cisco Nexus 7000 Series Hardware Installation and Reference Guide
OL-23069-06
Chapter 5 Installing Power Supply Units
Connecting a DC Power Supply Unit to DC Power Sources
To connect a DC power supply unit to a DC power source, you must connect two isolated inputs from
the DC power grid to the power supply unit for each 3 kW of output power provided by the power supply
unit. For 3 kW of power, you connect two isolated inputs through one plug to the power supply unit (see
Figure 5-3). For 6 kW of power, you connect four isolated inputs through two plugs to the power supply
unit (see Figure 5-4). For 3 kW of power with input source redundancy, you connect the two plugs, each
connected to a different DC power grid (see Figure 5-5).
Figure 5-3 Connecting DC Power to a 3-kW DC Power Supply Unit
Figure 5-4 Connecting DC Power to a 6-kW DC Power Supply Unit
1 DC power grid 3 DC power supply unit
2 Isolated inputs from DC power grid 4 Plug with two isolated inputs
1 DC power grid 3 DC power supply unit
2 Isolated inputs from DC power grid 4 Two plugs, each with two isolated inputs from
the DC power grid
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