B-3
Cisco MDS 9100 Series Hardware Installation Guide
OL-16187-01
Appendix B Technical Specifications
Power Specifications
General Power Supply Specifications
Table B-3
lists the specifications for the Cisco MDS 9100 Series AC input power supply.
Power Supply Requirements and Heat Dissipation Specifications
Table B-4
provides a sample calculation of power and heat dissipation for the Cisco MDS 9100 Series.
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.
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
(maximum)
4.7 A at 85 VAC
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
Table B-4
Power and Heat Dissipation
Model Number/
AC-Input
Power (watts)
Heat Diss.
(BTU/hr)
Input Current
85 VAC
(amps)
110 VAC
(amps)
220 VAC
(amps)
Cisco MDS 9134 Switch
(with fan modules)
96 maximum
330
1.41
1.10
.55
Cisco MDS 9124 Switch
(with fan modules)
96 maximum
330
1.41
1.10
.55
Cisco MDS 9140 Switch
(with fan modules)
204 maximum
870
3.0
2.32
1.16
Cisco MDS 9120 Switch
(with fan modules)
180 maximum
752
2.65
2.05
1.02
