PO versions provide a selflocking operation mode. In this mode, pressing the external forward switch K1 causes the motor to rotate forward immediately. If K1 is released, the motor continues rotating forward and does not stop until a reverse rotation signal K2 or a forward rotation stop signal SW1 is detected. Limit signal overview. The limit signal is a stop signal that is triggertype and levelenabled. If a short limit signal occurs during forward rotation, the motor stops immediately and remains stopped even if the limit signal disappears. To resume forward motion, the forward rotation input must be restarted. Signal requirements and sensor compatibility. The control inputs are active low and can be connected to a threewire sensor of the NPNNO type. The inputs K1, K2, SW1, and SW2 follow this specification. Key benefits Selflocking forward motion: no need to hold K1 to maintain forward rotation, improving ease of use and reducing operator effort. Clear endstop behavior: a limit signal reliably stops the motion and latches the stop state until a forward command is issued, enhancing safety and repeatability. Flexible sensor compatibility: supports common threewire NPNNO sensors with activelow signals, enabling easy integration with standard sensors. Predictable control: motor motion continues until a defined stop condition (K2 or SW1) or a limit signal is reached, reducing unintended movements. Simple wiring and control: straightforward integration with K1, K2, SW1, and SW2 inputs under the same spec. Applications and use scenarios Automatic sliding doors or gates: use K1 to initiate forward travel, with K2 or SW1 to stop at a preset position, and a limit signal to ensure precise end position. Endofline conveyors and material handling: the device moves forward to a stop point and remains until an explicit stop or reverse command is given, improving throughput with reliable endstops. Robotic fixtures and machine tools: selflocking forward motion allows quick setup and controlled retraction, with a defined stop via limit or stop signals for repeatable positioning. Any actuator system requiring a robust forwardonly drive until a defined stop condition is encountered, with compatibility to standard NPNNO sensors.