SIRIUS direct starter with integrated I/O
The Siemens 3RK1395-6LS41-2AD5 is a SIRIUS direct motor starter rated 12 A at 400 V AC, delivering 5.5 kW at 400 V. It's a self-contained unit with 4 digital inputs and 2 digital outputs, designed for standalone motor control without a separate PLC I/O slice.
Trip class flexibility and supply voltage
Trip class is selectable among CLASS 5, 10, 15, and 20, so you match the thermal overload curve to the motor's starting profile — short acceleration (class 5) or high-inertia loads (class 20). The control supply is 24 V DC nominal (20.4 to 28.8 V range), which is standard for modern control panels. ON-delay is 85 ms, OFF-delay 65 ms, giving predictable sequencing for interlocked starts.
Mounting and environmental ratings
Mounts via screw fixing in vertical, horizontal, or flat orientation — the manufacturer recommends horizontal for best thermal performance. Dimensions are 294 mm wide, 215 mm high, 148 mm deep. IP65 means hose-down cleaning is fine.
Power connection and I/O wiring
Main power circuit connects via a HAN Q4/2 plug per ISO 23570 — a standard industrial connector that simplifies panel wiring and field replacement. The 4 digital inputs and 2 digital outputs are on-board, so you can wire start/stop, feedback, and status directly without an expansion module.