Cisco 3000-W DC Power Supply

The power supplies can work together in either of two modes:

• Redundant Mode-Each power supply operates at approximately 50 percent of its capacity, no greater than 60 percent and no less than 40 percent. If one power supply fails, the other power supply can provide power for the entire system on its own. This is the default and recommended mode for production.
• Combined Mode-Each power supply provides approximately 83 percent of its capacity, providing a combined capacity of approximately 167 percent. If one power supply fails, the other power supply might not be able to provide power for the entire system. This is not the recommended mode for operation.