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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 m ode.
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.
Tab 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
112.5 A @ –44 V DC 550 W
215 A @ –44 V DC 660 W
315 A @ –44 V DC 660 W
Tab 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
16.25 A @
–40.5 / –44 V DC
253 W 275 W
27.5 A @ –40.5 /
–44 V DC
304 W 330 W
37.5 A @ –40.5 /
–44 V DC
304 W 330 W
Tab 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