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Catalyst 4500 E-Series Switches Installation Guide
OL-13972-01
Chapter 1 Product Overview
Power Supplies
The maximum total input current is 42.5A and the maximum ambient temperature is 55 C. To determine
total maximum input power to a supply, add up the active individual module input power ratings.
Table 1-9 provides output information for these modes, given two supplies working in combined mode.
Table 1-10 provides output information for these modes, given two supplies working in redundant mode.
Note In a redundant configuration with all inputs supplied, there must be a 100 W minimum system load or
the OUTPUT FAIL LED shows a false failure.
The 1400 W DC Triple Input SP Power Supply requires a minimum draw from the system that it is
installed in.
Table 1-11 shows the minimum draw for the possible modes.
Ta b l e 1-9 Combined Mode Power Supply Configuration
(2450 W Max Output Power)
Input
Number
Maximum Input Current
Maximum Input
Power @ –44 V DC
1 12.5 A @ –44 V DC 550 W
2 15 A @ –44 V DC 660 W
3 15 A @ –44 V DC 660 W
Ta b l e 1-10 Dual Redundant Mode Power Supply Configuration
(1400 W Max Output Power)
Input
Number
Approximate
Input Current
Approximate Input
Power @ –40.5 V DC
Approximate Input
Power @ –44 V DC
1 6.25 A @
–40.5 / –44 V DC
253 W 275 W
2 7.5 A @ –40.5 /
–44 V DC
304 W 330 W
3 7.5 A @ –40.5 /
–44 V DC
304 W 330 W
Ta b l e 1-11 Minimum Load Table
PSU1 PSU2
Input 1 Input 2 Input 3 Input 1 Input 2 Input 3
12V
Minimum
Load
3.3V
Minimum
Load
Single Operation
Mode 1 ON OFF OFF – – – 1.33A 0.6A
Mode 2 OFF ON OFF – – – 1.33A 0.6A
OFF OFF ON – – – 1.33A 0.6A
Mode 3 ON ON OFF – – – 2.66A 0.6A
ON OFF ON – – – 2.66A 0.6A
Mode 4 OFF ON ON – – – 2.66A 0.6A
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