Connection Guidelines For Ac-Powered Systems - Cisco MDS 9100 Series Hardware Installation Manual

Chapter 1 Technical Specifications
Table 1-3
AC Input Power Supply
Power supply output capacity
Power supply output voltage
Output holdup time
Power Supply Requirements Specifications
Table 1-4
supply.
Table 1-4
Cisco MDS 9148S Switch
Typical Case
50C/NV
50C/HV
Worst Case
Tip
To prevent a loss of input power, ensure that the total maximum load on each circuit supplying the power
supply is within the current ratings of the wiring and breakers.

Connection Guidelines for AC-Powered Systems

For connecting the Cisco MDS 9148S switch AC power supplies to the site power source, follow these
basic guidelines:
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•
•
OL-20185-01
Cisco MDS 9148S Switch AC Input Power Supply Specifications
provides a sample calculation of power for the Cisco MDS 9148S switch AC input power
Power and Heat Dissipation for AC Input Power Supply
Each power supply should have its own dedicated branch circuit.
For international, circuits should be sized according to local and national codes.
The AC power receptacles used to plug in the chassis must be the grounding type. The grounding
conductors that connect to the receptacles should connect to protective earth ground at the service
equipment.
Specification
300 W
12 V +/- 6% up to 25 A
20ms when input > 100 VAC
AC Power (Volt) AC Power (Watt)
220 125.08
220 125.08
110 127.72
220 144.8
110 145.87
220 155.3
110 158.48
220 183.11
110 187.66
Cisco MDS 9148S Multilayer Switch Hardware Installation Guide
Power Specifications
1-55