The **W2TS-NA3-R2** is a high-performance ultra-compact photoelectric sensor belonging to the **W2 Laser series** manufactured by **SICK**. These sensors are specifically designed for high-precision detection of small objects or features in space-constrained environments. --- ### 1. Technical Specifications The following table highlights the core electronic and optical characteristics of the W2TS-NA3-R2: | Feature | Specification | | :--- | :--- | | **Sensor Principle** | Photoelectric proximity sensor (Background suppression) | | **Light Source** | PinPoint LED (Visible red light) | | **Supply Voltage ($V_s$)** | 10 V DC ... 30 V DC | | **Switching Output** | NPN (Open collector) | | **Switching Mode** | Light/dark switching (via control wire) | | **Output Current ($I_{max}$)** | $\leq$ 50 mA | | **Response Time** | < 0.5 ms | | **Sensing Range** | 1 mm ... 30 mm | | **Connection Type** | Cable with M8 connector, 3-pin | --- ### 2. Key Electronic Components & Design #### A. Background Suppression (BGS) Unlike standard proximity sensors, the W2TS-NA3-R2 uses triangulation technology. This allows the sensor to detect an object regardless of its color or reflectivity while ignoring any background objects beyond the set sensing range. This is achieved via a dual-element receiver (near-field and far-field photodiodes). #### B. PinPoint LED Technology The "electronic heart" of the light emission is SICK’s **PinPoint LED**. * **Precision:** It creates a highly concentrated, small, and consistent light spot (similar to a laser but safer and more durable). * **Alignment:** The precise light spot makes it easy to align the sensor with tiny targets like electronic components or thin wires. #### C. Output Circuitry (NPN) The sensor uses an **NPN transistor** output. * When the sensor is triggered, the output pin is pulled to the negative rail (0V/Ground). * This is common in PLC systems used in Asia and the Americas. --- ### 3. Wiring Diagram Information The 3-pin M8 connector typically follows this standard assignment: 1. **Brown (L+):** Positive Supply (10-30V DC) 2. **Blue (M):** Negative Supply (0V / Ground) 3. **Black (Q):** NPN Switching Output --- ### 4. Typical Applications * **Electronics Assembly:** Detecting the presence of small SMD components on a PCB. * **Robotics:** End-of-arm tooling where space is extremely limited. * **Pharmaceuticals:** Detecting small vials or pills on a high-speed conveyor.