The Siemens 3RK1322-0CS02-0AA0 is a SIRIUS AS-Interface compact direct starter — an electromechanical DOL motor starter in an IP65 enclosure, rated for 0.06 kW at AC-3 duty on 400 V, with a bimetal overload relay adjustable from 0.18 to 0.25 A. This is a field-mountable unit, not a panel-mount contactor: the IP65 rating means it lives directly on the machine frame or conveyor section, handling washdown environments without a separate enclosure. It communicates over AS-Interface, so it drops onto a two-wire bus from the PLC with no control cabinet needed.
The setting range of 0.18 to 0.25 A covers very small motors — fractional-horsepower drives, small fans, dosing pumps, or valve actuators. The 0.06 kW AC-3 rating at 400 V confirms it's sized for a 60 W three-phase motor. If your BOM calls for a 0.25 kW motor, this starter is undersized; step up to the next SIRIUS compact starter frame. The IP65 enclosure (270 mm high, 120 mm wide, 190 mm deep) is self-contained with tab terminals for the main circuit and a 9-pole motor outgoing feeder. That means you land the motor cable and the AS-Interface bus cable directly on the unit — no separate junction box, no terminal strip inside a panel. The 9-pole power connection suggests it carries both the motor power and the brake/encoder wiring through one connector. The bimetal overload protection is the traditional thermal type — it tracks motor heating via a bimetal strip, not an electronic trip curve. It's reliable and field-proven, but if you need adjustable trip class or phase-loss sensitivity, you'd look at the electronic overload variants in the same SIRIUS compact family.
This is not a DIN-rail component — it's a field-mount enclosure with tab terminals and a 9-pole connector. Mount it on the machine frame or a bracket near the motor. The 190 mm depth means it sticks out a bit; allow clearance for the AS-Interface bus cable bend radius and the motor cable entry. No derating needed for standard ambient.