The BB9 Communications Box with USB connector provides a way to connect multiple Apex Mass Flow Controllers, Apex Mass Flow Meters and Apex Pressure Controllers. Each Apex unit is plugged into the BB9 hub with a double ended cable (DC-62 or DC-252). Power can be supplied by using a PVPS24U Power Adapter and plugging that into a standard wall outlet. Power from that unit will move through the BB9 to power other units. Connecting a computer with our FlowVision software installed, can connect to the BB9 and can “talk” to each Apex unit through an addressable RS-232 command. In this way, one computer can control and record output for multiple Apex units.