A-22
Catalyst 4500 E-Series Switches Installation Guide
OL-13972-02
Appendix A Power Supply Specifications
1400 W Triple-Input DC-Input Power Supply
1400 W DC Triple-Input Power Supply Operational Modes
The 1400 W triple-input DC-input power supply (data only) allows added redundancy by providing
terminals for two DC inputs rated at 15 A and one rated at 12.5 A per power supply.
This power supply has five operational modes depending on the inputs receiving power. When all three
inputs are active, at input voltages greater than –44.0 V DC, the power supply delivers 1400 W
maximum total output.
Table A-17
provides output information for these modes, given a single supply.
The maximum total input current is 42.5 A and the maximum ambient temperature is 55 C. To determine
the total maximum input power to a supply, add up the active individual module input power ratings.
Table A-18
provides output information for these modes, given two supplies working in combined mode.
Table A-19
provides output information for these modes, given two supplies working in redundant mode.
Table A-17
Input Modes
Input
Mode
Input
Number
Input Configuration
Maximum Total Output
Power
1
1
1 x 12.5 A
386 W @ –40.5 VDC
412 W @ –44.0 VDC
2
2 OR 3
1 x 15 A
466 W @ –40.5 VDC
495 W @ –44.0 VDC
3
1, 2 OR 3
1 x 12.5 A and
1 x 15 A
845 W @ –40.5 VDC
908 W @ –44.0 VDC
4
2, 3
2 x 15A
914 W @ –40.5 VDC
990 W @ –44.0 V DC
5
1, 2, 3
1 x 12.5A and
2 x 15 A
1294 W @ –40.5 VDC
1400 W @ –44.0 VDC
Table A-18
Combined Mode Power Supply Configuration
(2450 W Max Output Power)
Input
Number
Maximum Input Current
Maximum Input
Power @ –44 VDC
1
12.5 A @ –44 VDC
550 W
2
15 A @ –44 VDC
660 W
3
15 A @ –44 VDC
660 W
