The Siemens 3RK1322-0BS02-1AA3 is an AS-interface compact reversing starter in the SIRIUS family — an electromechanical reversing starter with bimetal motor protection, designed for direct-on-line reversing of small three-phase motors up to 0.06 kW at AC-3 duty at 400 V. It lives inside an IP65 enclosure, so it mounts directly on the machine frame or conveyor section without a separate control cabinet — suited for washdown zones or dusty lines where a panel would be impractical. The unit communicates over the AS-interface protocol (no PROFIBUS DP onboard), carries two integrated inputs, and includes a motor brake output — meaning it handles the reversing contactor pair, overload protection, brake control, and bus connection in one IP65 package.
The setting range of 0.14…0.2 A covers small motors — think fractional-horsepower drives, valve actuators, or small conveyor segments. The 0.06 kW AC-3 rating at 400 V confirms it for reversing duty on motors up to that power; The interrupting capacity of 50 000 A at 400 V means the integrated short-circuit protection (circuit-breaker style) can clear a fault up to 50 kA without upstream fuses — that's a high SCCR for a compact starter, giving selectivity headroom in a sub-distribution panel. Operating temperature range from -25 °C to +55 °C covers most indoor and outdoor installations in temperate climates; the IP65 seal keeps water jets and dust out, so placement near washdown stations or outdoor conveyors is fine.