Manual Turn on the FFU with the supplied three-speed switch. Have the manufacturer supply a SSSC (solid-state speed control).   Network  Connect directly to the FFU control board with Modbus RTU/BACnet MSTP/IP. You can connect to BAS directly or by using a gateway.   Network Local Control with PLC The FFU will require a network card. You can supply an AirCare console to control units. If required, you can pass all data through to a BMS, as well.