The **OBT80-R3-E2** is a high-performance subminiature photoelectric sensor manufactured by Pepperl+Fuchs. It operates on the **diffuse mode** principle, meaning it detects objects by the light reflected directly off the target. --- ### 1. Key Technical Specifications The following table summarizes the primary electronic and operational characteristics of the OBT80-R3-E2: | Feature | Specification | | :--- | :--- | | **Detection Range** | 0 ... 80 mm | | **Operating Voltage** | 10 ... 30 V DC | | **Output Type** | 1 PNP output, short-circuit protected, reverse polarity protected | | **Switching Type** | NO (Normally Open) / Light-ON | | **Switching Current** | Max. 100 mA | | **Switching Frequency** | approx. 800 Hz | | **Response Time** | < 0.6 ms | | **Light Source** | LED (Red, modulated light) | --- ### 2. Electronic Components & Connectivity The "E2" suffix in the model name specifically denotes the electronic output configuration. #### Output Logic: PNP (E2) * **PNP Output:** When the sensor detects an object (Light-ON), the output switches the load to the positive supply voltage ($V+ \text{ or } L+$). * **Protection:** The internal electronics include integrated protection against short circuits and reverse polarity to prevent damage during installation errors. #### Wiring Diagram (Standard 3-Wire) The device typically uses a 2-meter fixed cable or an M8 connector. The color coding follows industrial standards: ```text 1 (Brown) ---- (+) 10-30V DC 4 (Black) ---- (Output) PNP NO 3 (Blue) ---- (-) 0V / GND ``` --- ### 3. Physical & Optical Characteristics Despite its small "R3" housing (subminiature design), the electronics are fully encapsulated to provide high durability. * **Status Indicators:** It features a highly visible LED (typically yellow) to indicate the switching state. * **Optical Surface:** Uses a scratch-resistant glass or high-grade plastic lens to maintain signal integrity. * **Housing Rating:** IP67, meaning the electronic components are protected against dust and temporary immersion in water. --- ### 4. Typical Applications Due to its miniature size and fast response time ($0.6 \text{ ms}$), the electronics are optimized for: 1. **Semiconductor Industry:** Detecting small wafers or chips. 2. **Packaging:** Sensing small labels or presence of items in tight chutes. 3. **Robotics:** End-of-arm tooling where space and weight are critical.