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AT/S 4.20.1 Switch Actuator Technical Manual

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This document provides technical specifications, wiring diagrams, and application programming details for the ABB i-bus EIB AT/S 4.20.1, a 4-fold switch actuator designed for DIN rail mounting in distribution boards. It covers power supply, output contacts, switching currents, manual operation, bus voltage failure behavior, and application programs for logic, time delay, and priority switching functions.

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