The **OA2AS80-R100** is a specific part number primarily associated with **Opto-Electronic Ultrasonic Sensors**, specifically the **O-Series** from manufacturers like **Pepperl+Fuchs** or specialized automation suppliers. Below is a breakdown of its technical specifications and electronic characteristics. --- ## 1. Technical Specifications Table | Feature | Specification | | :--- | :--- | | **Sensing Method** | Ultrasonic (Transducer-based) | | **Sensing Range** | 80 mm to 1000 mm (1 meter) | | **Dead Zone** | 0 to 80 mm (Objects too close cannot be detected) | | **Output Type** | Analog (Current or Voltage) | | **Operating Voltage** | 10 V DC to 30 V DC | | **Housing Material** | Nickel-plated brass or Plastic (Model dependent) | | **Connection Type** | M12 Connector (typically 4 or 5-pin) | | **Switching Frequency** | ~4 Hz | --- ## 2. Electronic Components & Working Principle The OA2AS80-R100 operates based on the **Time-of-Flight (ToF)** principle. Internally, the device contains several critical electronic stages: ### A. The Piezoelectric Transducer The "heart" of the sensor. It converts electrical energy into mechanical vibrations (sound waves) at a frequency above human hearing. When the echo returns, the transducer converts the mechanical vibration back into an electrical signal. ### B. Signal Processing Circuitry * **Microcontroller (MCU):** Calculates the distance by measuring the time elapsed between the pulse emission and the echo reception. * **Temperature Compensation:** Because the speed of sound changes with air temperature, the internal electronics include a thermistor to adjust the distance calculation, ensuring accuracy. ### C. Output Interface Unlike a standard binary switch (ON/OFF), the **R100** series often features an **Analog Output**. This means it provides a continuous signal proportional to the distance: * **4 mA to 20 mA:** Current loop output. * **0 V to 10 V:** Voltage output. --- ## 3. Wiring Configuration (Standard M12) | Pin Number | Color | Function | | :--- | :--- | :--- | | 1 | Brown | +VCC (10-30V DC) | | 2 | White | Analog Output (Distance signal) | | 3 | Blue | GND (0V) | | 4 | Black | Switching Output / Teach-In | --- ## 4. Key Application Use-Cases 1. **Level Measurement:** Monitoring the height of liquids or grains in a tank. 2. **Diameter Detection:** Measuring the thickness of a roll of material (paper, plastic) on a machine. 3. **Positioning:** Ensuring a robotic arm or conveyor belt is at the correct distance from a target.