The **CJS2** (specifically referring to the **CJS2 Series** by manufacturers like SMC) is a miniature pneumatic cylinder. While the body is mechanical, the "electronic parts" associated with it primarily involve the **Auto Switches** used for position sensing. Below is a breakdown of the electronic components and technical specifications related to the CJS2 series. --- ### 1. Primary Electronic Component: Auto Switches Since the CJS2 is a miniature cylinder (bore sizes 6mm to 16mm), it uses specialized small-footprint sensors to detect the piston's position. | Component Type | Part Examples | Function | | :--- | :--- | :--- | | **Reed Switch** | D-A90, D-A93 | Uses a mechanical contact that closes in the presence of a magnetic field. Simple, 2-wire setup. | | **Solid State Switch** | D-M9N, D-M9P, D-M9B | Uses a Hall Effect sensor. No moving parts, longer life, and faster response times. | | **Magnetic Ring** | Internal | A permanent magnet mounted on the piston inside the cylinder that triggers the external switches. | --- ### 2. Technical Specifications of Sensors When integrating the CJS2 into an electronic control system (like a PLC), these electrical parameters are critical: | Feature | Solid State (NPN/PNP) | Reed Switch | | :--- | :--- | :--- | | **Load Voltage** | 24V DC (typical) | 24V DC / 100V AC | | **Current Consumption** | < 10mA | None | | **Response Time** | < 1ms | < 1.2ms | | **Indicator Light** | Red/Green LED | Red LED | | **Wiring** | 3-wire (VCC, GND, Out) | 2-wire | --- ### 3. Wiring Configuration To connect the electronic sensors of a CJS2 to a controller, the following logic is typically used: #### NPN Output (Sinking) Used primarily in Asian markets/controllers. ```python # Connection Logic Brown -> 24V DC (+) Blue -> 0V DC (-) Black -> PLC Input (Sinking) ``` #### PNP Output (Sourcing) Used primarily in European/North American markets. ```python # Connection Logic Brown -> 24V DC (+) Blue -> 0V DC (-) Black -> PLC Input (Sourcing) ``` --- ### 4. Mounting Hardware Because the CJS2 is extremely small, the electronic switches are not screwed directly into the body but are held by: * **Switch Mounting Brackets:** Specific bands that wrap around the cylinder tube. * **Rail Grooves:** Some variants allow the switch to slide into a precision track.