Chapter 1 Product Overview
Power Supplies
1-40
Catalyst 4500 Series Switches Installation Guide
78-14409-08
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 C4500 1400 W DC Triple Input SP Power Supply requires a minimum draw
from the system that it is installed in.
Table 1-11
shows
Table 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
Table 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
