Cisco 6509 Installation Guide - Page 250

4000 W AC-Input and DC-Input Power Supplies Appendix A Power Supply Specifications Table A-17 4000 W AC-Input and DC-Input Power Supplies Specifications (continued) Specification Description Branch circuit requirement (AC-input) Each chassis power supply should have its own dedicated, fused-branch circuit: • For North America-30 A • For International-Circuits should be sized according to local and national codes • All AC power supply inputs are fully isolated. - Source AC can be out of phase between multiple power supplies in the same chassis, which means that PS1 can be operating from phase A and PS2 can be operating from phase B. - Source AC can be out of phase between AC inputs on power supplies that are equipped with multiple AC inputs, which means that power cord 1 can be plugged into phase A and power cord 2 can be plugged into phase B. DC-input voltage • -48 VDC nominal @ 37 A in North America (operating range: -40.5 VDC to -56 VDC) • -60 VDC nominal @ 29 A for International (operating range: -55 VDC to -72 VDC) Note The 4000 W DC-input power supply requires two source DC-inputs to be connected; it cannot operate with only one positive (+)/negative (-) source DC terminal pair installed. DC-input current 40 A per each DC input (three inputs) Power supply output capacity • 4000 W with three inputs active • 2700 W with two inputs active Note The 4000 W power supply cannot operate with only one source DC-input connected. kVA rating 5.4 kVA maximum System power dissipation (DC power supply) 5200 W (total input power) A-40 Catalyst 6500 Series Switches Installation Guide OL-5781-04