What it is and where it fits
The Siemens 3RK1322-0GS02-1AA4 is an AS-Interface compact reversing starter in an IP65-rated enclosure — a self-contained motor control unit that handles forward/reverse switching, bimetal overload protection, and short-circuit protection via integrated circuit-breakers, all inside a housing rated for washdown environments. It is sized for a 0.18 kW motor at AC-3 duty on a 400 V line, with a setting range of 0.45 to 0.63 A, and includes a motor brake output rated for 500 V DC / 1 A. The enclosure carries the IP65 protection class, so it stands up to hose-down cleaning on a conveyor or packaging line without needing a separate panel.
Key ratings and what they mean for fit
The AC-3 rating of 0.18 kW at 400 V tells you this starter is matched to a small three-phase induction motor — typical for a roller conveyor, a small pump, or a divert gate. The 0.45 to 0.63 A setting range is narrow, so confirm your motor's full-load amps fall inside that window; there is no headroom for a motor drawing 0.7 A. The maximum short-circuit breaking capacity of 50 000 A at 400 V means this unit can safely clear a fault up to that level without upstream fuses needing to operate — useful when the starter is fed from a high-capacity bus. Communication is via AS-Interface protocol, not PROFIBUS DP, so the line must have an AS-i master and power supply. The housing includes two integrated inputs for local sensors or pushbuttons, plus a 9-pole motor outgoing feeder and a 9-pole power connection, both using tab terminals for quick wiring. The ambient temperature range of -25 to +55 °C covers most factory-floor conditions but watch for derating if mounted near a heat source.