What this AS-i reversing starter is and where it fits
The Siemens 3RK1322-1FS02-1AA1 is an AS-interface compact reversing starter in an IP65 enclosure — a self-contained motor control unit for reversing applications that mounts directly on the machine frame, not inside a control cabinet. The IP65 rating means the housing and the tab terminals withstand washdown environments, so this starter is suited for food-and-beverage or packaging lines where hose-down cleaning is routine. It is rated for 1.9 kW at 400 V AC-3 duty (the motor-switching category), which covers reversing drives for small conveyors, diverters, or pump valves. The bimetal overload relay is set for 3.5 to 5 A, matching the motor full-load current in that power band. The 50 kA short-circuit breaking capacity at 400 V means it can interrupt a fault up to that level without upstream fuses needing to clear — a useful headroom figure for selectivity studies on a distribution panel feeding multiple starters.
Integration details for panel and machine builders
Dimensions are 270 mm high, 120 mm wide, and 190 mm deep — a compact footprint for a reversing starter with integrated AS-i bus communication and two inputs. The main current circuit connects via tab terminals (9-pole motor outgoing feeder and 9-pole power connection), so the wiring pattern is fixed: match the mating connector to the tab layout. The unit includes a motor brake output rated 24 V DC / 3 A, which handles a small holding brake on the motor shaft — common for vertical-load reversing applications where the load must not drift when power is removed. Operating temperature range is -25 to +55 °C, so it can live on a machine in an unconditioned plant area without derating concerns for most ambient conditions.