SIPHA CONTROL UNIT 2 NO / 1 NC 24VAC/DC 110V/230VAC

The ALLEN-BRADLEY 440N-S32021 is a Sipha control unit that manages safety inputs and outputs for machine guarding and access control. It accepts one SIPHA input and provides two safety outputs plus one normally closed relay output and one normally closed auxiliary relay output, supporting automatic or manual modes and fixed timing from 0–3 seconds. Designed for 24V AC/DC and 110/230V AC supply options with a 45mm housing width, the module handles timed safety switching while maintaining Category 3 rated fault tolerance. Suitable for industrial safety circuits where a compact, configurable Sipha interface is required by maintenance or safety teams.

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