Cisco Catalyst 4500 Series

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
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