A-20
Catalyst 4500 E-Series Switches Installation Guide
OL-13972-02
Appendix A Power Supply Specifications
1400 W Triple-Input DC-Input Power Supply
Table A-14
list the 1400 W triple-input DC-input power supply LEDs and their meanings.
Table A-15
lists the 1400 W triple-input DC-input power supply input modes and outputs.
Current draw at –40.5 V
(min voltage)
Current draw at –72 V (max
voltage)
33.75 A total / # of modules = Amperes per module
19 A total / # of modules = Amperes per module
Max heat dissipation
1367 W
4665 BTUs
1.
The kVA rating listed for the power supply should be used as the sizing criteria for both UPS outputs as well as standard
circuits and transformers to power a switch.
Table A-13
1400 W DC Triple-Input Power Supply Specifications (continued)
Item
Specification
Table A-14
1400 W DC Triple-Input DC-Input Power Supply LEDs
LED
Meaning
INPUT OK
•
Green—Source DC voltage is OK. (Input voltage is –40.5 VDC or
greater.)
•
Off—Source AC voltage falls below –33 VDC, is not present, or the
power supply is turned off.
FAN OK
•
Green—Power supply fan is operating properly.
•
Off—Power supply fan failure is detected.
OUTPUT FAIL
•
Red—Problem with one or more of the DC-output voltages of the
power supply is detected.
•
Off—DC-output voltage with acceptable margins.
Note
For proper operation of the OUTPUT FAIL LED, systems with
single power supplies must be configured with a minimum of
one fan tray assembly and one supervisor engine. Systems with
dual power supplies must have a minimum configuration of one
fan tray assembly, one supervisor engine, and one additional
module. Failure to meet these minimum configuration
requirements can cause a false power supply output fail signal.
Table A-15
1400 W DC Triple-Input Power Supply Input Modes and Output
Input
Mode
Source DC
Connections
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
