the switch is powered through the internal power supply. you can also connect the cisco rps 300 or the cisco rps 675 to provide backup power if the switch internal power supply should fail.

    the catalyst 3750 switch and the cisco rps 300 or rps 675 should be connected to the same ac power source.

    internal power supply connector

    the internal power supply is an autoranging unit that supports input voltages between 100 and 240 vac. use the supplied ac power cord to connect the ac power connector to an ac power outlet.

    cisco rps connector

    specific cisco rps modes support specific catalyst 3750 switches:

    1?cisco rps 300 (model pwr300-ac-rps-n1) supports the catalyst 3750-24ts, 3750g-24t, 3750g-12s, and 3750-48ts switches.

    2?cisco rps 675 (model pwr675-ac-rps-n1=) supports the catalyst 3750 family of switches.

    cisco rps 300

    the cisco rps 300 has two output levels: –48v and 12v with a total maximum output power of 300w. use the supplied rps connector cable to connect the rps to the switch.

    the cisco rps 300 does not support the catalyst 3750g-24ts switches.

    attach only the cisco rps (model pwr300-ac-rps-n1) to the rps receptacle.

    the rps is a redundant power system that can support six external network devices and provides power to one failed device at a time. it automatically senses when the internal power supply of a connected device fails and provides power to the failed device, preventing loss of network traffic. for more information on the cisco rps 300, refer to the cisco rps 300 redundant power system hardware installation guide.

    cisco rps 675

    the cisco rps 675 has two output levels: –48v and 12v with a total maximum output power of 675w. use the supplied rps connector cable to connect the rps to the switch.

    attach only the cisco rps (model pwr675-ac-rps-n1=) to the rps receptacle.

    the rps is a redundant power system that can support six external network devices and provides power to one failed device at a time. it automatically senses when the internal power supply of a connected device fails and provides power to the failed device, preventing loss of network traffic. for more information on the cisco rps 675, refer to the cisco rps 675 redundant power system hardware installation guide.