Chapter 1 Product Overview
Power Supplies
1-42
Catalyst 4500 Series Switches Installation Guide
78-14409-08
Dual Redundant Operation
Mode 1
ON
OFF
OFF
ON
OFF
OFF
2.66A
1.2A
Mode 2
OFF
ON
OFF
OFF
ON
OFF
2.66A
1.2A
OFF
OFF
ON
OFF
OFF
ON
2.66A
1.2A
Mode 3
ON
ON
OFF
ON
ON
OFF
5.32A
1.2A
ON
OFF
ON
ON
OFF
ON
5.32A
1.2A
Mode 4
OFF
ON
ON
OFF
ON
ON
5.32A
1.2A
Mode 5
ON
ON
ON
ON
ON
ON
8A
1.2A
Table 1-11
Minimum Load Table (continued)
PSU1
PSU2
Input 1
Input 2
Input 3
Input 1
Input 2
Input 3
12V
Minimum
Load
3.3V
Minimum
Load