US/U 2.2 Universal Interface Technical Manual

This technical document describes the ABB i-bus EIB US/U 2.2 universal interface, a two-fold flush-mounted device with four channels that can be parameterized as inputs or outputs for connecting conventional push buttons, floating contacts, or LEDs. It provides detailed specifications, circuit diagrams, application programs, and configuration parameters for functions such as switch/dimming sensors, shutter control, scene control, and pulse counting.