The Siemens SIRIUS 3RK1315-6KS71-3AA3 is a reversing motor starter — a single enclosure that handles forward and reverse direction control for a three-phase motor, saving panel space versus two separate contactors with mechanical interlocking. Its 0.75 kW rating at 400 V matches a standard 1 hp (0.7 hp at 460/480 V,) induction motor on a conveyor, pump, or small fan.
AS-Interface communication and I/O count
This starter communicates via AS-Interface — not PROFINET or PROFIBUS DP. That makes it a fit for existing AS-i networks common in material handling and packaging lines where a single two-wire bus carries both power and data to field devices. It carries 4 digital inputs and 1 digital output, so it can read limit switches or sensors and report a fault or status bit back to the controller without a separate I/O block. Addressing is done through an M12 plug, typical for AS-i nodes. The main circuit connects via a HAN Q4/2 plug per ISO 23570 — a standard industrial connector for motor power.
Supply voltage and environmental limits
The DC supply is 24 V nominal, with a permissible range of 20.4 to 28.8 V and a maximum of 31.6 V. The minimum permissible voltage for reliable operation is 26.5 V — note that this is higher than the lower end of the range, so the supply must hold above 26.5 V under load. Shock resistance is 12g for 11 ms, vibration resistance is 7 mm at 2g — robust enough for machine-mounted duty on presses or conveyors. Pollution degree 3 means it tolerates conductive pollution in industrial environments.