Cisco Catalyst 4500 Series Configuration Manual page 403

Chapter 12 Environmental Monitoring and Power Management
Power supplies needed by system
Power supplies currently available : 2
Power Summary
(in Watts)
----------------------
System Power (12V)
Inline Power (-50V)
Backplane Power (3.3V)
----------------------
Total
Switch#
As with other power supplies, the two power supplies must be of the same type (6000 W AC or 4200 W
AC or 1400 W DC). Otherwise, the right power supply is put in err-disable state and the left one is
selected. In addition, all the inputs to the chassis must be at the same voltage. In redundant mode, the
inputs to the left and right power supplies must be identical. If the left and right power supplies are
powered in redundant mode, the power values is based on the power supply with the higher output
wattage.
Note When the system is powered with a 4200 W or 6000 W power supply either in 110 V or 220 V combined
mode operation, the available power is determined by the configuration of the system (the type of line
cards, the number of line cards, number of ports consuming inline power, etc.) and does not reflect the
absolute maximum power.
In a matched redundant power supply configuration, if a power supply submodule fails, the other (good)
Note
power supply provides power to its full capability.
Table 12-6
Table 12-6
Power Supply
110 V
110 V+110 V
or 220 V
220 V+220 V
In combined mode, all the inputs to the chassis must be at the same voltage.
Table 12-7
Table 12-7
Power Supply
Both sides (bays) at 110 V
110 V+110 V, other side 110 V
Both sides at 110 V+110 V
Both sides at 220 V
OL-25340-01
Used
----
140
0
0
----
140 (not to exceed Total Maximum Available = 2100)
illustrates how the 4200 W AC power supply is evaluated in redundant mode.
Power Output in Redundant Mode for the 4200 W AC Power Supply
12 V
660
1360
1360
illustrates how the 4200 W AC power supply is evaluated in combined mode.
Combined Mode Output for the 4200 W AC Power Supply
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
: 1
Maximum
Available
---------
1360
1850
40
---------
3.3 V
40
40
40
12 V 3.3 V
1200 40
1800 40
2200 40
2200 40
Power Management
-50 V Total
700 1050
1850 2100
3700 4200
-50 V Maximum
1320 1870
2000 2730
3100 3800
3100 3800
12-15