The Cisco N2200-PAC-400W-B is a 400W AC power supply module designed for the Cisco Nexus 2200 Series Fabric Extenders (FEX) . Its primary distinguishing feature is the back-to-front (reversed) airflow, meaning it draws air in from the port side and exhausts it out the power supply side, which is ideal for data center deployments with specific hot/cold aisle configurations .
