Weight per UnitComponent
6.4 lb (2.9 kg)3-kW DC Power Supply (N9K-PDC-3000W-B)–
Power Specifications
Power specifications include the specifications for each type of power supply module.
Power Requirements for Switch Modules
Determine the number of power supplies required to operate all the modules in a switch by adding the maximum
power amounts for each module in the switch. Then divide the sum by 3000 W. If there is a fractional amount
in the result, add 1 to the result. For n+1 redundancy, add one more power supply. For n+n redundancy, double
the number of power supplies and provision for a second power source.
To determine the typical consumption, add the typical power amounts for each module in the switch.
Make sure that any new power supplies use the same type of power (AC or DC) as the rest of the power
supplies in the switch. Do not use a mix of AC and DC power sources for a switch.
Maximum Power Available to the Switch
The maximum power available for operations depends on the input power from your power source. Also, the
number and output capabilities of your power supplies, and the power redundancy mode that you use. The
following table lists the amount of power available for 3-kW power supplies depending on power inputs,
numbers of power supplies, and the mode used.
Table 4: Maximum Power Available for a Switch with 3-kW Power Supplies
n
+
n
Redundancy Mode
n
+1 Redundancy
Mode
Combined ModePower
Supplies
Power Inputs
——3000 W11 input (220 V)
3000 W3000 W6000 W2
3000 W6000 W9000 W3
6000 W9000 W12,000 W4
6000 W12,000 W15,000 W5
9000 W15,000 W18,000 W6
9000 W18,000 W21,000 W7
12,000 W21,000 W24,000 W8
The following power supply unit supports dual high-voltage AC/DC inputs and offers more flexibility to
support input-source redundancy.
Cisco Nexus 9508 NX-OS Mode Switch Hardware Installation Guide
115
System Specifications
Power Specifications
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