What it is and what it does
The Siemens 3RK1315-6NS71-3AA0 is a SIRIUS reversing motor starter — a self-contained unit that handles forward/reverse control of a three-phase motor in a single enclosure. It's rated 4 kW at 400 V, with a Trip Class 10 thermal overload curve, meaning it protects standard induction motors against running overloads without nuisance tripping on startup inrush. The IP65 rating means the housing and all connectors are sealed against hose-directed water and dust ingress, so it's suited for washdown environments or outdoor installation on conveyors, pumps, or small material-handling lines. Power supply is 24 V DC nominal (20.4 to 28.8 V range), with a maximum permissible voltage of 31.6 V. The unit communicates via AS-Interface protocol — no PROFIBUS or PROFINET onboard — and includes 4 digital inputs for local control signals. Main circuit connection uses a HAN Q4/2 plug per ISO 23570; device addressing is through an M12 plug.
Mounting and environment
Mounts via screw fixing in vertical, horizontal, or flat orientation — the recommended position is horizontal. Dimensions are 294 mm wide, 215 mm high, 159 mm deep. Rated for pollution degree 3 (industrial environments with conductive or dry non-conductive pollution). Operating temperature range is -25 to +55 °C; storage and transport range is -40 to +70 °C. Vibration resistance is 7 mm / 2g; shock resistance is 12g for 11 ms.