What this AS-i compact starter does on the line
The Siemens 3RK1322-0ES02-0AA0 is an AS-interface compact direct starter (DOL) in an IP65 enclosure, rated for 0.1 kW at 400 V AC-3 duty with a setting range of 0.28 to 0.4 A. It uses a bimetal overload relay for motor protection and electromechanical switching contacts, with short-circuit protection provided by circuit-breakers. The IP65 rating means the housing and connections withstand washdown environments — this unit mounts directly on the machine frame or conveyor section, not inside a control cabinet, saving panel space and wiring runs.
Fieldbus integration and I/O
Communication runs on AS-interface protocol, not PROFIBUS DP — verify your network master supports AS-i before specifying. The starter includes two integrated inputs for local sensors (e.g., limit switches or presence detectors) and a bus communication function, so it can report motor status and accept start/stop commands over the same two-wire AS-i cable. The 9-pole motor outgoing feeder and 9-pole power connection use tab terminals; plan for the correct mating connectors at the machine end.
Short-circuit withstand and coordination
The maximum short-circuit breaking capacity (Icu) at 400 V is rated at 50 000 A — that is the fault current this starter can safely interrupt without catastrophic failure. For Type 2 coordination (no damage to the starter after a fault), pair it with the circuit-breaker specified in the manufacturer's coordination tables; the 50 kA figure gives headroom on most industrial 400 V supplies where the prospective fault current rarely exceeds 25 kA.
Environmental limits and mounting
Rated for ambient operation from -25 °C to +55 °C, which covers unheated plant areas and warm machine zones. Dimensions are 270 mm high, 120 mm wide, 190 mm deep — a compact footprint for a fully integrated starter with bus communication and local I/O. The IP65 enclosure allows direct mounting on the machine without a separate panel; cable entries need IP65-rated glands.