Summit 550 W AC and DC Power Supplies

Summit 550 W power supplies are available in the following models:

550 W AC PSU-FB (Part number 10925)—AC power supply with front-to-back ventilation airflow
550 W DC PSU-FB (Part number 10926)—DC power supply with front-to-back ventilation airflow
550 W AC PSU-BF (Part number 10927)—AC power supply with back-to-front ventilation airflow
550 W DC PSU-BF (Part number 10928)—DC power supply with back-to-front ventilation airflow

These power supplies are compatible with the following switch models:

X670-G2 switches (all models)

The power supply must have the same airflow direction (front-to-back or back-to-front) as the switch with which it is being used. In a redundant power configuration, the airflow direction must be the same for both power supplies, and it must match the airflow direction of the fans in the switch.

The Summit 550 W power supplies (AC and DC) have the status LEDs listed in Summit 550 W Power Supply LED Status Indications.

Table 1. Summit 550 W Power Supply LED Status Indications
Position	Color and State	Meaning
Top Power Good	Steady Green	+3.3VSB ok; 12 V ok; power supply is working properly.
Middle Power Supply Fail	Steady Amber	Fault condition (for example, 3.3VSB OCP/UCP, 12V OCP/UCP, or fan failure).
Bottom AC OK	Steady Green	Power supply is connected to power. If the cord is connected and this LED is off, the power supply is defective.