ECY-TU203 (IMP) BBC Connected Terminal Unit Controller for fan coil, heat pump and chilled beam applications with 3 UI, 2 DI, 1 sensor input, 4 DOR (relay), 2 DOT (triac), 2 AO and 2 DUO (triac/analog). Embedded ENVYSION Viewer and xpressENVYSION. Preloaded apps in IMP.