The Siemens 3RK1322-1CS02-1AA1 is an AS-interface compact reversing starter in an IP65 enclosure — a field-mounted motor control unit that combines a reversing contactor, bimetal overload relay, and short-circuit protection via integrated circuit-breakers into one package. It is designed for distributed motor control on AS-i networks, eliminating the need for a central control cabinet for each motor branch. Rated for 0.9 kW at AC-3 duty on 400 V three-phase, the setting range covers 1.8 A to 2.5 A motor full-load current.
IP65 enclosure and washdown deployment
The IP65 protection class means the housing is dust-tight and protected against water jets from any direction — suitable for washdown environments on food, beverage, or chemical processing lines where hose-down cleaning is routine. The electromechanical switching contacts and bimetal overload are sealed inside, so moisture and debris stay out of the motor protection circuit. The 270 mm height, 120 mm width, and 190 mm depth give a compact footprint for mounting on machine frames or pedestals near the motor.
AS-i bus integration and brake control
Communication is via AS-interface protocol (no PROFIBUS DP on this variant), with bus communication enabled and two integrated inputs for local sensors or pushbuttons. The product includes a motor brake output (24 V DC / 3 A) for holding brakes on vertical-axis motors — a common requirement on conveyor lifts, hoists, or palletizers where the load must not drift when power is removed. Main circuit connections use tab terminals — a quick-connect interface standard on many motor-mounted starters. The 9-pole motor outgoing feeder and 9-pole power connection match the Siemens AS-i cabling system, so replacement drops in without re-terminating individual wires.