Cisco MDS 9100 Series User Manual

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Cisco MDS 9148S Multilayer Switch Hardware Installation Guide
OL-20185-01
Chapter 1 Technical Specifications
Power Specifications
Power Supply Requirements Specifications
Table 1-4 provides a sample calculation of power for the Cisco MDS 9148S switch AC input power
supply.
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:
• 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.
Power supply output capacity 300 W
Power supply output voltage 12 V +/- 6% up to 25 A
Output holdup time 20ms when input > 100 VAC
Table 1-3 Cisco MDS 9148S Switch AC Input Power Supply Specifications
AC Input Power Supply Specification
Table 1-4 Power and Heat Dissipation for AC Input Power Supply
Cisco MDS 9148S Switch AC Power (Volt) AC Power (Watt)
220 125.08
Typical Case 220 125.08
110 127.72
50C/NV 220 144.8
110 145.87
50C/HV 220 155.3
110 158.48
Worst Case 220 183.11
110 187.66

Cisco MDS 9100 Series Specifications

General

Brand	Cisco
Model	MDS 9100 Series
Category	Switch
Language	English