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US/U 4.1 Universal Interface Installation and Operating Instructions

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This document provides installation and operating instructions for the ABB i-bus EIB Universal Interface (US/U 4.1), a 4-channel flush-mounted device that can be parametrized as inputs or outputs for connecting conventional pushbuttons, potential-free contacts, or LEDs. It covers technical data, safety warnings, connection diagrams, and commissioning via ETS2 software for use in building system engineering installations.

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