The Siemens 3RK1322-0CS02-1AA3 is an AS-interface compact reversing starter from the SIRIUS family, designed for direct-on-line reversing of small motors up to 0.06 kW at AC-3 duty on a 400 V supply. It's an electromechanical unit with bimetal motor protection and integrated short-circuit protection via circuit-breakers, all housed in an IP65 enclosure rated for washdown environments — think conveyor reversing stations or valve actuators on food-and-bev or packaging lines where you need reversing control and AS-i bus connectivity in one sealed package. The setting range spans 0.18 A to 0.25 A (full-scale value 0.25 A), so it's sized for fractional-horsepower motors — small gearmotors, dosing pumps, or shuttle drives. The 50 kA breaking capacity at 400 V means it can safely interrupt fault currents up to that level without upstream damage, which is unusually high for a starter this compact; it gives you selectivity headroom in a mixed panel. It communicates over AS-interface (AS-i) protocol, not PROFIBUS DP, and includes a motor brake output — a common requirement for vertical-load holding or rapid stop applications. The 9-pole motor outgoing feeder and 9-pole power connection handle the reversing contactor wiring and brake control in one plug-in interface, reducing field wiring time.
Deployment Context
The IP65 rating means the enclosure withstands hose-down cleaning and dust ingress — it's suited for direct machine mounting in wet or dusty areas without a separate panel. The -25 °C to +55 °C operating range covers most unheated factory environments. Tab terminals on the main current circuit accept standard quick-connect receptacles; the AS-i bus connection and 9-pole motor cable plug in via the integrated connectors. Dimensions are 120 mm wide × 270 mm high × 190 mm deep — a compact footprint for a reversing starter with integrated brake output and bus interface. Mounts directly to machine frames or sub-panels via the enclosure's fixing points.