Connection Guidelines For Ac-Powered Systems - Cisco MDS9120 - MDS 9120 Multilayer Fabric Switch Installation Manual
Hardware installation guide
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Appendix B
Technical Specifications
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
Table B-5
Model Number/Module
Cisco MDS 9140
Switch (with fan
modules)
Cisco MDS 9120
Switch (with fan
modules)
To prevent a loss of input power, ensure that the total maximum load on each circuit supplying the
Tip
power supply is within the current ratings of the wiring and breakers.
Table B-6
AC input power supply.
Table B-6
Model Number/
Cisco MDS 9148
Switch (with fan
modules)
Cisco MDS 9134
Switch (with fan
modules)
Cisco MDS 9124
Switch (with fan
modules)
Cisco MDS 9140
Switch (with fan
modules)
Cisco MDS 9120
Switch (with fan
modules)
Connection Guidelines for AC-Powered Systems
For connecting the Cisco MDS 9100 Series switch AC power supplies to the site power source, follow
these basic guidelines:
•
OL-21514-01
Power and Heat Dissipation for AC Input Power Supply (continued)
AC Input
Power (watts)
204 maximum 870
180 maximum 752
provides a sample calculation of power and heat dissipation for the Cisco MDS 9100 Series
Power and Heat Dissipation for DC Input Power Supply
DC Input
Power (watts)
Not supported -
96 maximum
80 maximum
204 maximum 928
180 maximum 819
Each power supply should have its own dedicated branch circuit.
Heat Diss.
85 VAC
(BTU/hr)
(amps)
3.0
2.65
Input Current
Heat Diss.
48 VDC
(BTU/hr)
(amps)
-
332
8.00
273
8.00
5.67
5.00
Cisco MDS 9100 Series Hardware Installation Guide
Power Specifications
Input Current
110 VAC
220 VAC
(amps)
(amps)
2.32
1.16
2.05
1.02
60 VDC
(amps)
-
6.67
6.67
4.53
4.00
B-5
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