The **ADN-113-R/Q** is a specific series of industrial pressure switches typically manufactured by **Norgren** (or affiliated brands like Herion). These devices are designed to convert hydraulic or pneumatic pressure changes into an electrical signal. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Component Type** | Electromechanical Pressure Switch | | **Media** | Neutral, gaseous, or liquid fluids | | **Switching Element** | Microswitch (Snap-action) | | **Electrical Connection** | M12 x 1 or DIN EN 175301-803 (Plug A) | | **Contact Type** | Changeover (SPDT) | | **Max Voltage** | 250V AC / 30V DC | | **Max Current** | Up to 4A (dependent on specific variant) | --- ### 2. Internal Electronic Parts and Construction The "electronic" side of this device is primarily **electromechanical**, meaning it uses physical movement to trigger an electrical contact. #### A. The Microswitch Inside the housing is a precision microswitch. When the process pressure reaches the "set point," a piston or diaphragm overcomes a spring force and pushes a small lever on the microswitch. * **Gold-plated contacts:** Often used in these models to ensure low contact resistance and reliability in low-voltage PLC circuits. #### B. The Connector Interface The **R/Q** suffix usually denotes the electrical connection style: * **M12 Connector:** A circular 4-pin or 5-pin industrial interface common in automation. * **Integrated LED (Optional):** Some versions include a small LED circuit to indicate the "Switching Status" (Power on / Contact closed). #### C. Adjustment Mechanism While not a digital circuit, the electronic trigger point is controlled by a **calibrated compression spring**. By turning an adjustment screw, you change the mechanical resistance against the electrical switch. --- ### 3. Wiring Diagram Logic The ADN-113 series generally follows a standard **SPDT (Single Pole Double Throw)** logic: ```markdown Pin 1: Common (Supply) Pin 2: Normally Closed (NC) - Opens when pressure is reached Pin 3: Normally Open (NO) - Closes when pressure is reached Pin 4: Ground / PE ``` --- ### 4. Common Applications * **Safety Interlocks:** Ensuring a machine won't start unless oil pressure is present. * **Filter Monitoring:** Detecting a pressure drop across a filter. * **Process Control:** Sending a signal to a PLC once a tank reaches a specific pressure level.