The **KUS-H2-R** typically refers to a high-precision, industrial-grade **Ultrasonic Distance Sensor** (often produced by brands like KUS or equivalents in the automation industry). These sensors are engineered for non-contact distance measurement using sound waves. Below is an explanation of its electronic components and technical characteristics. --- ### 1. Core Electronic Components The device consists of several internal modules that work together to measure distance: | Component | Function | | :--- | :--- | | **Ultrasonic Transducer** | A piezoelectric ceramic element that converts electrical energy into ultrasonic pulses and vice versa. | | **Microcontroller (MCU)** | The "brain" that calculates the Time-of-Flight (ToF) and converts it into a distance value. | | **Signal Amplifier** | Boosts the weak echo signals received by the transducer for processing. | | **Temperature Sensor** | Compensates for the speed of sound variations caused by ambient temperature changes. | | **Output Driver** | Manages the signal interface (Analog or Digital) to communicate with a PLC or controller. | --- ### 2. Technical Specifications Most sensors in the H2-R series share the following electronic profile: * **Operating Voltage:** Typically **10V to 30V DC**, making it compatible with standard industrial power supplies. * **Output Signal types:** * **Analog:** 4–20 mA or 0–10 V (proportional to distance). * **Switching:** PNP or NPN (normally open/closed) for threshold detection. * **Blind Zone:** A small area directly in front of the sensor (usually 0–100mm) where measurements are inaccurate due to ringing. * **Resolution:** High precision, often down to 1mm. --- ### 3. Connection and Wiring The sensor usually utilizes an **M12 4-pin or 5-pin connector**. Standard industrial wiring colors are: 1. **Brown (BN):** Positive (+) 10-30V DC. 2. **Blue (BU):** Negative (-) 0V / Ground. 3. **Black (BK):** Switching Output (PNP/NPN). 4. **White (WH):** Analog Output (4-20mA / 0-10V). --- ### 4. Working Principle 1. **Emission:** The electronic circuit triggers the transducer to emit a 40kHz - 200kHz ultrasonic burst. 2. **Reflection:** The wave hits an object and returns to the sensor. 3. **Reception:** The transducer vibrates upon receiving the echo, generating a small voltage. 4. **Calculation:** The MCU calculates distance using the formula: `Distance = (Speed of Sound × Time) / 2` ---