The **OBE2000-R3-SE2** is a high-performance miniature thru-beam photoelectric sensor manufactured by Pepperl+Fuchs. It is designed for industrial automation where space is limited but high reliability is required. --- ### 1. Core Technical Specifications The following table highlights the primary electronic and operational characteristics of the device: | Feature | Specification | | :--- | :--- | | **Detection Method** | Thru-beam (Emitter/Receiver pair) | | **Detection Range** | 0 to 2000 mm (2 meters) | | **Operating Voltage** | 10 ... 30 V DC | | **Output Type** | PNP, Open Collector, Short-circuit protected | | **Switching Type** | Dark-ON (Output active when light beam is interrupted) | | **Switching Frequency** | approx. 1000 Hz (1 ms response time) | | **Current Consumption** | < 15 mA | --- ### 2. Electronic Component Breakdown #### A. The Emitter and Receiver Logic As a **thru-beam sensor**, the system consists of two separate components: * **Emitter:** Uses a high-intensity **Visible Red LED** (approx. 630 nm). The red light makes alignment much easier for technicians during installation. * **Receiver:** Contains the phototransistor and processing circuitry to detect the presence or absence of the emitted light. #### B. Output Circuitry (PNP / Dark-ON) The "SE2" suffix indicates the output configuration: * **PNP Output:** When the sensor is triggered, it connects the output pin to the positive supply voltage (V+). * **Dark-ON (D-ON):** The output signal is high when the light beam is **interrupted** (i.e., an object is present between the emitter and receiver). #### C. Connectivity and Housing * **Wiring:** Usually equipped with a fixed cable or a M8 plug connection (depending on the specific sub-model). * **Protection:** Integrated protection against reverse polarity and short circuits ensures the internal electronics are not damaged by wiring errors. * **Environmental Rating:** IP67 rated, meaning the internal electronics are fully sealed against dust and immersion in water. --- ### 3. Connection Diagram (Standard Wire Colors) The typical wiring for the receiver unit is as follows: ```markdown 1. Brown (L+) --> +10 to 30V DC 2. White (NC) --> Not Connected (usually) 3. Blue (L-) --> 0V / Ground 4. Black (OUT) --> Load / PLC Input (PNP Signal) ``` --- ### 4. Key Applications * **Small Parts Detection:** Due to its miniature R3 series housing. * **Conveyor Monitoring:** Counting objects or detecting jams in narrow spaces. * **Robotics:** End-of-arm tooling position sensing.