Cisco Systems WSC4500XF32SFP manual Maximum Input Current, Power @ -44 V DC, Approximate, 1-37

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 1-9provides output information for these modes, given two supplies working in combined mode. Table 1-10provides output information for these modes, given two supplies working in redundant mode.

Table 1-9	Combined Mode Power Supply Configuration
	(2450 W Max Output Power)
Input		Maximum Input
Number	Maximum Input Current	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	Approximate	Approximate Input	Approximate Input
Number	Input Current	Power @ –40.5 V DC	Power @ –44 V DC
1	6.25 A @	253 W	275 W
	–40.5 / –44 V DC
2	7.5 A @ –40.5 /	304 W	330 W
	–44 V DC
3	7.5 A @ –40.5 /	304 W	330 W
	–44 V DC

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 1-11shows

	Catalyst 4500 Series Switches Installation Guide
78-14409-08		1-37