Reversing starter for ET 200X — PROFIBUS DP, IP65, with brake contact
The Siemens 3RK1300-1DS01-1AA4 is an EM 300 RS electromechanical reversing starter designed for the ET 200X distributed I/O system. It integrates a reversing contactor pair, bimetal overload protection, and a motor brake output into a single IP65 enclosure — meaning it lives directly on the machine, not in a central panel, and handles reversing duty for small motors up to 1.1 kW at 400 V AC-3. The setting range of 2.2…3.2 A covers the full-load current of a 1.1 kW motor at 400 V; the bimetal overload matches the motor thermal curve, so the part is sized for that specific motor power class. PROFIBUS DP is onboard, so the starter communicates directly with the ET 200X backplane — no separate gateway or I/O block needed for the reversing function. The brake contact output is rated DC 500 V / 1 A for internally supplied brakes, which is the typical spec for small holding brakes on geared motors and servo axes.
Integration into ET 200X — dimensions, wiring, and environment
At 134 mm deep × 140 mm wide × 270 mm high, the 3RK1300-1DS01-1AA4 occupies one slot in the ET 200X modular rail system. The main current circuit connects via tab terminals — fast push-on connections that match the ET 200X power distribution bus — while the 9-pole motor feeder and 9-pole power connection handle the motor cable and brake wiring. Rated operating voltage is 400…500 V AC, covering standard 400 V three-phase networks with tolerance for 480 V installations. Ambient temperature range is 0…55 °C, so it handles unventilated machine cabinets or warm production floors.