What this part is and where it fits
The Siemens 3RK1322-0ES02-0AA1 is a SIRIUS AS-interface compact starter — a fully integrated direct-on-line (DOL) motor starter in an IP65-rated enclosure, designed for distributed motor control in automated production lines. It combines a motor-protective circuit breaker (bimetal overload), an electromechanical contactor, and AS-i bus communication into a single 190 mm × 120 mm × 270 mm package that mounts directly on the machine frame, not inside a central panel. Rated for 0.1 kW at 400 V AC-3 duty (motor switching), with a setting range of 0.28 A to 0.4 A for the bimetal overload relay. The 50 kA short-circuit breaking capacity at 400 V means it can safely interrupt fault currents up to that level without upstream fuses needing to clear first — a key spec for SCCR compliance on a machine sub-panel. The IP65 rating means the enclosure withstands washdown and dust ingress — suitable for food-and-beverage lines, packaging machinery, or any wet-area deployment where a central cabinet would be impractical. Operating ambient range of -25 to +55 °C covers most factory-floor conditions without derating.
Integration and connectivity
Communication is via AS-interface (AS-i) protocol, not PROFIBUS DP. The part includes two integrated inputs for local sensors (e.g., limit switches or presence detectors) and a motor brake output rated for 24 V DC / 3 A — so it handles both the motor start/stop and the brake release in one unit. Main current circuit connections use tab terminals, typical for quick-connect harnesses in distributed installations. The 190 mm depth and 120 mm width are the envelope dimensions of the complete IP65 housing. This is not a DIN-rail component; it bolts to a machine frame or sub-plate via the four corner mounting holes. Plan for cable gland clearance on the bottom face — the 9-pole motor and power connectors exit there.