Appendix B Technical Specifications

Power Specifications

General Power Supply Specifications

Table B-3lists the specifications for the Cisco MDS 9100 Series AC input power supply.

Table B-3 Cisco MDS 9100 Series AC Input Power Supply Specifications

AC-Input Power Supply

Specification

 

 

AC-input voltage

Minimum = 85 VAC

 

Nominal = 100 to 240 VAC

 

Maximum = 264 VAC

 

 

AC-input current rating

4.7 A at 85 VAC

(maximum)

3.6 A at 110 VAC

 

1.8 A at 220 VAC

 

Note For plug current rating, see the

 

“Jumper Power Cord” section on

 

page C-5.

 

 

AC-input frequency

Minimum = 47 Hz

 

Nominal = 50 to 60 Hz

 

Maximum = 63 Hz

 

 

Power supply output capacity

300 W

 

 

Power supply output voltage

12 V +/- 6% up to 25 A

 

 

Output holdup time

20 ms when input > 100 VAC

 

 

Power Supply Requirements and Heat Dissipation Specifications

Table B-4provides a sample calculation of power and heat dissipation for the Cisco MDS 9100 Series.

Table B-4

Power and Heat Dissipation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input Current

 

 

 

 

 

 

 

 

 

 

AC-Input

Heat Diss.

85 VAC

110 VAC

220 VAC

Model Number/

 

Power (watts)

(BTU/hr)

(amps)

(amps)

(amps)

 

 

 

 

 

 

Cisco MDS 9134 Switch

96 maximum

330

1.41

1.10

.55

(with fan modules)

 

 

 

 

 

 

 

 

 

 

 

Cisco MDS 9124 Switch

96 maximum

330

1.41

1.10

.55

(with fan modules)

 

 

 

 

 

 

 

 

 

 

 

Cisco MDS 9140 Switch

204 maximum

870

3.0

2.32

1.16

(with fan modules)

 

 

 

 

 

 

 

 

 

 

 

Cisco MDS 9120 Switch

180 maximum

752

2.65

2.05

1.02

(with fan modules)

 

 

 

 

 

 

 

 

 

 

 

 

Tip To prevent a loss of input power, ensure the total maximum load on each circuit supplying the power supply is within the current ratings of the wiring and breakers.

Cisco MDS 9100 Series Hardware Installation Guide

 

OL-16187-01

B-3

 

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Cisco Systems MDS 9100 Series manual General Power Supply Specifications, AC-Input Power Supply Specification