The Siemens 3RK1322-1DS02-0AA1 is an AS-interface compact direct starter — a self-contained motor control unit that combines a contactor, bimetal overload relay, and short-circuit protection (via circuit-breakers) in a single IP65 housing. It is a direct-on-line (DOL) starter rated for 1.1 kW at 400 V under AC-3 duty, meaning it handles the high inrush of squirrel-cage motors during starting and breaking. The setting range of 2.2 to 3.2 A covers the full-load current of a motor in that power band. The IP65 protection class means the enclosure is dust-tight and protected against water jets — suited for washdown environments in food processing, packaging, or automotive assembly lines where hose-down cleaning is routine. The unit includes a motor brake output rated for 24 V DC / 3 A, allowing direct control of a holding brake on vertical-axis or conveyor loads without an external relay.
Bimetal overload element with setting range 2.2 to 3.2 A matches motor nameplate FLA. AS-interface protocol integration means this starter communicates directly on an AS-i network, reporting status and accepting start/stop commands over a two-wire bus. Two integrated inputs allow connection of local pushbuttons or sensors without a separate I/O block. The unit does not support PROFIBUS DP, so for Profibus networks you would need a gateway or a different variant.
Plan for cable entry via glands or connectors to maintain the IP65 seal. Operating temperature range -25 to +55 °C. Control circuit uses DC voltage.