The **OG-R30 SN** refers to a high-precision **Photoelectric Label Sensor** (often associated with brands like Reer or specialized industrial automation manufacturers). These sensors are designed to detect labels on a carrier tape, even when the labels are transparent. ### 1. Key Electronic Specifications The electronic architecture is designed for high-speed industrial environments (NPN/PNP logic). | Parameter | Specification | | :--- | :--- | | **Supply Voltage** | 10 - 30 VDC | | **Current Consumption** | < 40 mA | | **Switching Output** | NPN and PNP (Push-Pull) | | **Switching Frequency** | 10 kHz (High Speed) | | **Response Time** | < 50 µs | | **Connection Type** | M8 Connector (4-pin) | --- ### 2. Core Electronic Components & Features #### A. The Sensing Element (Ultrasonic or Optical) Depending on the specific "SN" revision, these units typically use **Ultrasonic** technology or **Infrared** light. * **Ultrasonic Transducer:** Unlike standard optical sensors, the electronic transducer measures the thickness or density of the material. This allows it to "see" clear labels on clear backing. * **Signal Processor:** An internal ASIC (Application-Specific Integrated Circuit) processes the analog signal from the transducer and converts it into a digital pulse. #### B. Output Logic (SN Designation) The "SN" in the model number usually indicates the output configuration: * **Push-Pull Stage:** The electronics include a transistor circuit that can act as either NPN (Sinking) or PNP (Sourcing), making it compatible with various PLC (Programmable Logic Controller) inputs. * **Light/Dark Switching:** A physical button or remote "Teach" wire allows the user to invert the electronic signal (e.g., Signal ON when a label is present vs. Signal ON when a gap is present). #### C. The "Teach-In" Circuitry This is a critical electronic feature. Instead of a manual potentiometer, the OG-R30 uses a **digital teach-in process**: 1. **Microprocessor Calibration:** When the Teach button is pressed, the internal processor samples the voltage levels of the "gap" and the "label." 2. **Threshold Storage:** It stores the optimal switching threshold in non-volatile memory (EEPROM) so settings are retained after power loss. --- ### 3. Pinout Configuration (M8 Connector) | Pin Number | Color | Function | | :--- | :--- | :--- | | **1** | Brown | +10...30 VDC | | **2** | White | Teach-in / Remote Input | | **3** | Blue | 0V (GND) | | **4** | Black | Switching Output (PNP/NPN) | --- ### 4. Circuit Protection Features The internal electronics are hardened for industrial use: * **Reverse Polarity Protection:** Prevents damage if the + and - wires are swapped. * **Short Circuit Protection:** The output stage shuts down if a wiring fault occurs, preventing the sensor from burning out. * **EMC Shielding:** The internal PCB is designed to resist electromagnetic interference from nearby motors or high-voltage lines.