The Siemens 3RK1322-1BS02-1AA0 is an AS-interface compact reversing starter in an IP65 enclosure, designed for direct-on-line reversing of three-phase motors up to 0.75 kW at 400 V AC-3 duty. Motor protection is provided by a bimetal overload relay with a setting range of 1.4 to 2 A, and short-circuit protection is handled by integrated circuit-breakers. The switching contacts are electromechanical, and the unit communicates over the AS-interface protocol (not PROFIBUS DP), with two integrated inputs for local sensors or pushbuttons.
The AC-3 motor rating of 0.75 kW at 400 V defines the maximum induction motor load it can switch under full-load starting conditions — this is the rating that governs the BOM line, not the thermal setting range. Power connections use tab terminals (9-pole motor and 9-pole power connectors), so the wiring interface is a quick-connect style — verify your cable terminations match before specifying.
The IP65 enclosure and integrated bus communication let it mount directly on the machine frame, reducing panel space and wiring runs.
Sourcing is straightforward: specify the order code into the BOM and order against an RFQ. No cross-reference or substitute is needed for current-production orders.