What this AS-i reversing starter does on a conveyor line
The Siemens 3RK1322-0KS02-1AA0 is an electromechanical reversing starter with integrated AS-interface communication, rated for 0.37 kW at AC-3 duty on a 400 V supply. The setting range of 0.9 to 1.25 A covers small three-phase motors — think a 0.37 kW conveyor drive or a divert arm actuator. The IP65 enclosure lets it mount directly on the machine frame or conveyor section, not inside a panel — saves DIN rail space and keeps the wiring local to the motor.
IP65 and the washdown reality
On a conveyor line that sees washdown cycles or overhead condensation, this starter lives on the machine profile without a separate enclosure.
AS-interface drops the fieldbus wiring
The AS-interface protocol (AS-i) carries both power and communication on a single two-wire yellow cable. For a zoned conveyor system, that means no separate control cable from the panel to each reversing starter — the AS-i master talks directly to this unit, and the two integrated inputs can read photoeyes or limit switches at the same drop point. No PROFIBUS DP on this variant, so if the line runs PROFIBUS, you need a gateway.