PO version (Self-locking) — Product Description and Key Details Key benefits - Provides reliable self-locking control for motor direction to prevent unintended reversals or stalls. - Simplifies external control: a momentary external forward or reverse command maintains motor motion after the switch is released, reducing operator effort. - Clear, safety-oriented limit behavior: short or transient limit signals reliably stop motion and require intentional restart, avoiding accidental restarts. How it works (functional summary) - PO versions are self-locking: when an external forward switch (K1) is pressed, the motor begins a forward rotation and remains rotating after the switch is released. The motor stops only when a reverse-turn signal (K2) or the forward-turn stop signal (SW1) is received. - Limit (stop) signals are trigger-type, level-activated inputs. If a forward rotation encounters a limit signal, motion is stopped immediately; the motor remains stopped even if the limit signal is removed. To resume forward movement, the forward rotation signal must be issued again. - Signal logic: inputs are active low. The product accepts standard three-wire NPN normally-open (NPN-NO) sensors. Inputs K1, K2, SW1, and SW2 conform to the same active-low specification. Features and attributes - Function: Self-locking directional control with defined limit/stop behavior for safe and predictable motor operation. - Compatibility: Accepts active-low control signals and three-wire NPN-NO sensors; K1, K2, SW1, SW2 are compatible with this signaling convention. - Performance behavior: Latching forward/reverse commands until a definitive stop or opposite command is received; limit inputs act as level-activated stops that persist until a restart command. - Size/material: Refer to the product datasheet or label for exact chassis dimensions and materials used; ensure mechanical compatibility with your installation. - Electrical interface: Designed for active-low control inputs; check system wiring to match NPN-NO sensor outputs or equivalent active-low drivers. Important operational notes - A short or transient limit signal will stop motion immediately and the controller will remain in the stopped state until a new forward or reverse command (as appropriate) is applied. - After a limit-triggered stop, removing the limit signal does not automatically restart motion. - Use sensors and switches that provide active-low outputs (or adapt outputs to active-low) to ensure reliable operation. - K1 = external forward command, K2 = external reverse command, SW1 = forward stop/limit, SW2 = reverse stop/limit (all follow the same active-low/sensor compatibility). Typical applications (practical scenarios) - Automated sliding gate: Use a momentary push-button (K1/K2) or NPN-NO sensor to start forward/reverse motion; SW1/SW2 act as final-limit switches to prevent overtravel. - Conveyor indexing and safety: Motor advances on a forward command and holds until a programmed stop or a limit switch (SW1) is reached; transient limit signals halt the conveyor and require a deliberate restart. - Motorized valve or actuator control: Simple forward/reverse control with reliable stop signals to protect mechanical endpoints and ensure controlled restarts. Compatibility checklist before installation - Confirm control inputs and sensors provide active-low signals or that you can convert them to active-low. - Verify use of three-wire NPN-NO sensors when applicable. - Map external controls to K1 (forward), K2 (reverse), SW1 (forward limit), and SW2 (reverse limit) per the wiring diagram in your product documentation. Safety and troubleshooting tips - Test limit switches and sensors for correct active-low operation before commissioning. - If the motor does not restart after a stop, ensure the appropriate forward/reverse command is reissued (the system will not auto-restart when a limit clears). - Consult the product wiring diagram and electrical ratings before connecting sensors or external switches. This description preserves the PO version behavior and signal requirements: self-locking forward/reverse control, trigger-type level-activated limit signals that latch stop conditions, and active-low input compatibility including three-wire NPN-NO sensors for K1, K2, SW1, and SW2.