Power Supply Options The Cisco Nexus 2200 chassis provide a choice of AC or DC power supply. Power supplies embed a fan and thus fan settings need to match the option selected for standard airflow or reversed airflow: • 400 watt (W) AC power supply, standard airflow • 400W AC power supply, reversed airflow • 400W DC power supply, standard airflow The 400W DC power supply has the following characteristics: • Cisco® part number N2200-PDC-400W • Supported on all Cisco Nexus 2200 chassis • Supported in front-to-back airflow configurations only (port-side exhaust) • -48 to -60 VDC Note that black alignment indicators on the power supply and fan indicate matching reversed-airflow power supplies and fans. The standard-airflow versions do not have an indicator. If black alignment indicators do not align throughout the fans and power supplies, the power supplies and fans are mismatched.