Cisco Nexus 3500 Series Options

Part Number	Description
NXA-PDC-500W=	Nexus sw 500W DC PSU, Forward AF (port-side exhaust)
NXA-PDC-500W	Nexus sw 500W DC PSU, Forward AF (port-side exhaust)
NXA-PDC-500W-B	Nexus sw 500W DC PSU, Reversed AF (port-side intake)
NXA-PDC-500W-B=	Nexus sw500W DCPSU,ReversedAF(portSideIntake)