What this part is and what it does
The Siemens 3RK1322-0JS02-1AA0 is an AS-interface compact reversing starter from the SIRIUS family, designed as a fully enclosed IP65-rated motor starting solution for distributed automation. It integrates an electromechanical reversing contactor with bimetal motor protection, short-circuit protection via circuit-breakers, and two integrated inputs, all in a single housing with tab terminals for the main current circuit. The setting range covers 0.7 to 1 A, delivering 0.25 kW at AC-3 duty on a 400 V supply — sized for small reversing motor loads like conveyor drives or actuator valves in washdown zones.
Key ratings and what they mean for fit
The IP65 rating means the enclosure and all connections withstand direct hose-down and dust ingress — this starter mounts directly on the machine frame or in a wet-area panel without an additional enclosure. The 50,000 A short-circuit breaking capacity (Icu) at 400 V means this unit can safely interrupt a fault up to that level without cascading damage upstream — critical for coordination in high-fault panels. Operating temperature range of -25 to +55 °C covers most plant-floor environments, including unheated warehouse bays and outdoor enclosures in temperate climates. AS-interface protocol onboard means this starter communicates directly on the AS-i bus without an external gateway — the two integrated inputs can capture local sensors or pushbuttons and pass status back to the controller.
Where it fits in the panel or machine
Dimensions of 270 mm high, 120 mm wide, and 190 mm deep — this is a compact standalone enclosure, not a DIN-rail module, so it mounts via its own fixing points directly to a subplate or machine frame. Tab terminals on the main circuit mean the power wiring uses fast-on connectors — common in pre-wired harnesses for conveyor sections or packaging machinery where quick replacement matters. The 9-pole motor outgoing feeder and 9-pole power connection handle the reversing contactor wiring plus the AS-i bus and sensor inputs through a single cable entry — keeps gland-plate clutter down.