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BE/S 4.20.1 4-Fold Binary Input Device Manual

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This document describes the ABB BE/S 4.20.1, a 4-fold binary input device for coupling potential-free contacts with the ABB i-bus® EIB/KNX system. It details the device's technical specifications, including polling voltage, sensing current, manual operation keys, and application functions such as switching, dimming, shutter control, and light scene storage.

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