The Siemens 3RK1300-1DS01-0AA1 is an EM 300 DS electromechanical direct starter designed for the ET 200X distributed I/O system. It's a self-contained motor starting and protection unit that combines a contactor, bimetal overload relay, and short-circuit protection (circuit-breaker design) in one IP65-rated enclosure. The setting range covers 2.2 to 3.2 A, which translates to a rated motor power of 1.1 kW at 400 V AC-3 duty — that's the standard three-phase motor switching category for squirrel-cage motors. The AC-3 rating is what governs real motor starts and stops; the 1.1 kW figure is the one to match against your motor nameplate. It communicates over PROFIBUS DP, so it integrates directly into a Siemens PROFIBUS network without a separate gateway. The brake contact output (DC 24 V/3 A) is built in for externally supplied motor brakes, which saves a separate interposing relay on conveyors or vertical-axis applications.
This direct starter mounts to the ET 200X system, so it's a distributed solution — it lives out on the machine or conveyor line, not back in a central cabinet. Dimensions are 140 mm wide, 270 mm high, and 134 mm deep. The 9-pole motor feeder and 9-pole power connection use tab terminals for the main circuit, which is a standard fast-on connection format common in distributed starter blocks. The DC control voltage (24 V nominal) is the standard for industrial control systems.