SILCON TRIPLE CHASSIS PROTOCOL CNVTR American Power Conversion (APC) is a leading provider of global, end-to-end infrastructure availability solutions. APC's comprehensive products and services offering, which is designed for both home and corporate environments, improves the availability, manageability and performance of sensitive electronic, network, communication and industrial equipment of all sizes. The SmartSlot Silcon DP300E Triple Chassis (AP9604S) is an American Power Conversion (APC) accessory that allows you to use SmartSlot monitoring and control accessories with your APC Silcon DP300E series UPS.