S e n d d o c u m e n t c o m m e n t s t o n e x u s 7 k - d o c f e e d b a c k @ c i s c o . c o m
A-7
Cisco Nexus 7000 Series Hardware Installation and Reference Guide
OL-23069-06
Appendix A Technical Specifications
Power Specifications for the Cisco Nexus 7000 Series Switches
•
Power-supply redundancy mode—Allows you to replace a power supply during switch operations.
All power supplies are active. The available power is calculated as the least amount of power
available from all but one of the power supply units (N+1). The reserve power is the amount of
power output by the power supply unit that can output the most power. For example, if three power
supply units output 3 kW, 6 kW, and 6 kW, the available power is 9 kW (3 kW + 6 kW) and the
reserve power is 6 kW.
•
Input source redundancy mode—Takes power from two electrical grids so that if one grid goes
down, the other grid can provide the power needed by the switch. Each grid powers half of each
power supply unit (grid A is connected to the Input 1 receptacle on each power supply unit and grid
B is connected to the Input 2 receptacle on each power supply unit). The available power is the
amount of power output by the portions of the power supply units that are connected to the same
grid. For example, if three power supply units are connected to a 110-V grid and a 220-V grid, each
power supply outputs 1.2 kW for the 110-V grid and 3.0 kW for the 220-V grid. The available power
would be 3.6 kW (1.2 kW + 1.2 kW + 1.2 kW) and the reserve power would be 9.0 kW (3.0 kW +
3.0 kW + 3.0 kW).
•
Full redundancy mode—Provides both power-supply redundancy and input-source redundancy.
This mode allows you to replace a power supply unit without interrupting switch operations or
continue powering the switch if one of two grids goes down. The available power is the lesser
amount of output power for power supply redundancy or input source redundancy.
The amount of power available for use with your Cisco Nexus 7000 Series switch depends on the number
of power supply units, input voltage used, and the power mode used. To determine the amount of
available power for 6-kW AC power supply units, see
. To determine the amount of power
available for 7.5-kW AC power supply units, see
. To determine the amount of power
available for the 6-kW DC power supply units, see
.
Table A-9
Power Availability for 6-kW AC Power Supply Units
Combined
Mode
Power
Supply
Redundancy
Mode
Input Source
Redundancy
Mode
Full
Redundancy
Mode
Dual inputs per power supply unit
220-V and 220-V inputs
1 power supply unit
6000 W
—
3000 W
—
2 power supply units
12,000 W
6000 W
6000 W
6000 W
3 power supply units
18,000 W
12,000 W
9000 W
9000 W
4 power supply units
1
24,000 W
18,000 W
12,000 W
12,000 W
220-V and 110-V inputs
1 power supply unit
4200 W
—
1200 W
—
2 power supply units
8400 W
4200 W
2400 W
2400 W
3 power supply units
12,600 W
8400 W
3600 W
3600 W
4 power supply units
1
16,800 W
12,600 W
4800 S
4800 W
110-V and 110-V inputs
1 power supply unit
2400 W
—
1200 W
—
2 power supply units
4800 W
2400 W
2400 W
2400 W
3 power supply units
7200 W
4800 W
3600 W
3600 W