LIMIT SWITCH 2 POSITIONS

A pneumatic limit switch with 2 positions is a sensing device that converts a mechanical movement or position into a pneumatic signal. It's essentially a position-actuated, 3-way, 2-position (3/2) directional control valve where the valve's spool is shifted by an external mechanical force, rather than an electrical signal or manual lever. ??? Operation and Function Actuation: The switch is activated when a moving part of a machine (like a cylinder rod, cam, or carriage) physically contacts and depresses its plunger, roller lever, or whisker. Signal Conversion: In the normal (unactuated) position, the valve may block the air supply and exhaust the pilot line. In the actuated position, the valve changes state, allowing the compressed air supply to flow out through the working port. This outgoing air signal is then used to pilot (control) another pneumatic component, such as a directional valve or a timer. Application: These switches are crucial in fully pneumatic control systems (where no electricity is used) for sequencing operations, confirming the end-of-stroke of an actuator, or providing safety interlocks. ?? Key Specifications Type: Typically a 3/2 (3-port, 2-position) valve. Positions: Two�one resting/normal position and one actuated position. Signal: Outputs a pneumatic pressure signal (e.g., P 1 ? ) when tripped.