What this AS-i compact starter does on the line
The Siemens 3RK1322-0DS02-1AA0 is an electromechanical reversing starter in an IP65 enclosure, designed for direct AS-interface bus communication. It integrates the motor protection (bimetal), reversing contactors, and short-circuit protection (circuit-breakers) into a single package that mounts directly on the machine frame — no separate control cabinet needed for this part of the line. The setting range of 0.22 to 0.32 A covers small motors up to 0.09 kW at AC-3 duty on a 400 V supply. That 0.09 kW rating is the motor power it can switch under standard starting conditions — think small conveyor drives, valve actuators, or indexing tables where reversing is required. This starter is built for washdown zones or dusty environments where a standard panel-mount contactor would need a separate enclosure.
AS-interface integration and wiring
AS-interface protocol is onboard — no external gateway module required for the bus connection. The starter carries two integrated inputs, so it can read limit switches or sensors directly without pulling extra I/O drops. The 9-pole motor outgoing feeder and 9-pole power connection use tab terminals, which means pre-assembled cables with matching tab receptacles speed up field wiring. No PROFIBUS DP protocol on this variant — it speaks AS-i natively. If your line uses PROFIBUS, you would need a different order code or a bus coupler. The equipment marking per DIN EN 61346-2 is Q (power switching device), which helps with consistent panel labeling. Dimensions are 270 mm high, 120 mm wide, 190 mm deep. That 190 mm depth is the full projection from the mounting surface — factor it into machine guarding clearance, not just the footprint.
The maximum short-circuit breaking capacity (Icu) at 400 V is 50,000 A. That is a high fault-current rating for a compact starter — it means this unit can be installed on supply points with substantial available fault current without needing upstream current-limiting fuses for the starter branch. The integrated circuit-breaker design handles the short-circuit protection internally. The bimetal overload protection is thermally compensated within that range.
No last-time-buy or surplus-channel dependency applies here.