PO versions and self-locking behavior - PO is self-locking. When the external forward switch K1 is pressed, the motor rotates forward. Releasing K1 does not stop the motor; it continues to rotate forward. - Movement stops only when the reverse turn signal K2 or the forward turn stop signal SW1 is activated. - This behavior provides reliable forward motion until a stop signal is received, reducing the need for continuous button presses. Limit signal and stop protection - The limit signal is also referred to as a stop signal. It is a trigger-type, level-activated input. - If a short (momentary) limit signal occurs during forward rotation, movement stops immediately. - Even if the limit signal disappears, the motor remains stopped. To resume forward movement, the forward rotation signal must be restarted. - The limit signal acts as an effective safety and position-check that prevents overtravel. Signal requirements and sensor compatibility - The signal input is active low. - It supports a three-wire sensor of the NPN-NO type. - The control inputs K1, K2, SW1, and SW2 comply with this active-low specification, ensuring straightforward wiring and compatibility with common sensors. Use scenarios - Industrial gate or door actuator: Use K1 to initiate forward motion, K2 to reverse, and SW1 to stop, with limit signals providing automatic stopping at set positions. - Assembly line actuator: Forward travel initiated by K1, with SW1 as a stop input and limit signals ensuring safe stop and recovery only after reissuing the forward command. - Access control or enclosure latching: The self-locking PO behavior helps maintain position without constant power, while limit and stop signals provide precise control and safety.