The **OBR1000-R2-E2** is a subminiature retroreflective photoelectric sensor manufactured by Pepperl+Fuchs. It is designed for high-precision detection in space-restricted environments. --- ### 1. Key Technical Specifications The following table outlines the primary electronic and operational characteristics of the device: | Parameter | Specification | | :--- | :--- | | **Effective Detection Range** | 0 ... 1000 mm | | **Operating Voltage** | 10 ... 30 V DC | | **No-load Supply Current** | < 10 mA | | **Output Type** | 1 PNP output, short-circuit protected, reverse polarity protected, open collector | | **Switching Type** | NO (Normally Open) - Light ON | | **Switching Voltage** | Max. 30 V DC | | **Switching Current** | Max. 50 mA | | **Voltage Drop** | $\le$ 1.5 V DC | | **Switching Frequency** | Approx. 800 Hz | | **Response Time** | 600 $\mu$s | --- ### 2. Internal Electronic Components & Operation #### A. Light Source (Emitter) The device utilizes a **Red LED (630 nm)**. The light is modulated to ensure the sensor distinguishes its own signal from ambient light interference. #### B. Output Stage (PNP E2) The "E2" designation specifically refers to the output configuration: * **PNP Logic:** When the object is detected (or light path is clear, depending on logic), the sensor connects the output load to the positive supply voltage ($V+ \rightarrow$ Load $\rightarrow$ Ground). * **Open Collector:** This allows the sensor to act as a switch for external loads up to 50 mA. #### C. Connection Diagram The sensor typically uses a 3-wire configuration. Below is a representation of the wiring logic: ```markdown Wire Color | Assignment | Function -----------|------------|------------------------- Brown (L+) | +V | Positive Supply (10-30V) Blue (L-) | 0V | Ground/Negative Supply Black (Q) | Output | PNP Switching Signal ``` --- ### 3. Integrated Protection & Diagnostics The electronics include several built-in safeguards to ensure longevity: * **Reverse Polarity Protection:** Prevents damage if the power leads are swapped. * **Short-Circuit Protection:** Protects the output stage if the load exceeds 50mA or if the signal wire is grounded. * **LED Indicators:** * **Green LED:** Power on. * **Yellow LED:** Lights up when the output is active (detection status).