US/U 2.2 Universal Interface Technical Data and Wiring Guide

This document provides technical data and wiring instructions for the ABB i-bus KNX US/U 2.2, a two-channel universal interface that can be parameterized as either inputs or outputs. It details power supply requirements, input/output specifications, connection cables, and application programs for integrating conventional push buttons, contacts, or LEDs into a KNX building automation system.