The Siemens 3RK1322-1ES02-1AA1 is an AS-interface compact reversing starter in an IP65 enclosure — a self-contained motor control unit for reversing applications that combines a reversing contactor, bimetal overload relay, and AS-i bus communication in one housing. The bimetal overload protection is set via a 2.8 to 4 A adjustment range, matching the motor full-load current.
The integrated motor brake output (24 V DC / 3 A) saves an external brake rectifier or relay for motors with spring-applied brakes — common on vertical-axis drives. AS-interface protocol onboard means this starter connects directly to an AS-i network without a separate gateway module, reducing wiring and cabinet space. No PROFIBUS DP option here — this is an AS-i-native device.
Dimensions of 270 mm high, 120 mm wide, and 190 mm deep. The IP65 housing is designed for direct machine mounting — no DIN rail, no enclosure needed. Main circuit connections use tab terminals; the 9-pole motor and power connectors are pre-wired for quick replacement. Two integrated inputs allow local pushbuttons or sensors to be wired directly, reducing the need for remote I/O drops.
For BOM-line sourcing, the 2.8 to 4 A setting range and 1.5 kW AC-3 rating are the critical fit parameters. Verify the motor FLA falls within that window and the AS-i network is already in place.