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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
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Power-supply redundancy mode—Allows y ou to replace a power supply during switch operations.
All power su pplies are a cti ve . Th e av ail able pow er i s ca lcu la ted a s th e lea st a m o un t o f powe r
avail able from a ll but on e of t he pow er su pply un it s (N+1). Th e rese rve pow er i s th e am o un t of
power output by the power supply unit that can output the mo st power. For example, if three power
supply u ni ts o u tpu t 3 k W, 6 k W, an d 6 kW, the av ail able pow er i s 9 k W (3 kW + 6 k W ) an d th e
reserve pow e r is 6 k W.
•
Input so urce red un d an cy m o de—Takes pow e r fro m t w o e lec tric al grid s so t ha t i f on e grid g oe s
dow n , t he ot he r gri d c an prov id e t he pow er n ee de d by t he sw it ch. Ea ch gri d po w ers h alf o f each
pow er supply unit (grid A is connected to the Input 1 receptacle on each power supply unit and grid
B is c on n ect ed to t he I npu t 2 rece ptacl e o n ea ch pow er su pply un it ). Th e a va il able pow er is th e
am ou nt o f pow er o ut put by t he porti on s o f the pow er su pply u n its th at are co nn ect ed to t he 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 1 10-V grid and 3.0 kW for the 220-V grid. The available power
wou ld be 3.6 k W (1.2 kW + 1.2 k W + 1.2 kW) a nd t he reserv e po we r w ou ld be 9.0 k W (3.0 kW +
3.0 kW + 3.0 k W ).
•
Ful l re du nd an cy m od e— P rovid es bo th pow e r-supply red u nd an cy a nd i nput -sou rce redu n da ncy.
This mode allows you to replace a power supply unit without interrupting switch operations or
cont in u e pow e ring t he sw it ch if o n e o f tw o g rids go es do w n. Th e a va il able pow er is th e l esser
amo u nt o f ou tpu t po we r f o r pow e r supply redun da nc y or i npu t so u rce red un dan cy.
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 Ta bl e A- 9. To determine the amount of power
available for 7.5-kW AC power supply units, see Table A-10. To determine the amount of power
available for the 6-kW DC power supply units, see Table A-11.
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
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