Motor starter with AS-Interface bus — what it handles
The 3RK4320-3MQ51-0BA3: Two digital inputs are onboard, and the unit includes a motor brake output for 400 V AC braking.
AS-Interface integration and mounting flexibility
The starter supports AS-Interface protocol natively — no external gateway module needed for the bus connection. It mounts on a vertical surface with ±180° rotation possible, and can be tilted forward or backward by ±22.5° on that surface. IP54 protection means it handles dust and splashing water in panel or machine-mounted enclosures. The 3-pole main current circuit uses circuit-breakers for short-circuit protection, with the overload relay being a bimetal type.
No official successor or pin-compatible alternative is listed; the part is the active AS-Interface motor starter in this SIRIUS family.