The Siemens 3RA8411-1KE00 is a pre-assembled intelligent load feeder from the SIRIUS 3RA8 family — a direct starter rated 1.2-12 A at up to 690 V AC, type of coordination 1, in frame size S00. It is designed to mount directly into an ET 200SP distributed I/O system, combining the communication interface, motor starter, and circuit protection in one DIN-rail-ready package. The assembly consists of three matched components: a 3RC7140-1KE00 communication module, a 3RV2311-1KC20 circuit breaker, and a 3RT2017-2BB42 contactor.
The 1.2-12 A adjustable overload range covers small motors, pumps, and conveyors typical in a food-and-beverage or packaging line. The 690 V AC maximum insulation voltage means it handles 400 V three-phase systems with headroom, but the type of coordination 1 rating means that under a short-circuit fault the starter may need replacement — it is not coordinated for Type 2 (no-damage) protection. Frame size S00 keeps the footprint compact on the DIN rail, leaving room for additional I/O slices in the ET 200SP station.
Integration into the ET 200SP system
The 3RA8411-1KE00 snaps onto the ET 200SP backplane bus, sharing power and communication with the CPU and other slices. It requires no separate control wiring for the starter — the PROFINET or PROFIBUS link carries start/stop commands and feedback. The circuit breaker (3RV2311-1KC20) provides short-circuit and overload protection up to the rated 12 A; the contactor (3RT2017-2BB42) switches the motor load. Verify that the ET 200SP station's total current budget and backplane power supply can support the feeder's draw.