The **LMS-B4-R/Q** is a specific series within the family of **Laser Displacement Sensors** (often associated with brands like Wenglor or similar industrial automation manufacturers). These devices are used for high-precision, non-contact distance measurement. --- ### 1. Technical Specifications Overview The "R" and "Q" suffixes typically denote specific output configurations or interface types within the product line. | Feature | Specification | | :--- | :--- | | **Sensing Principle** | Laser Triangulation | | **Light Source** | Red Laser (Class 1 or 2) | | **Output Type (R)** | RS-232 / Serial Interface | | **Output Type (Q)** | Analog (0-10V or 4-20mA) + Switching | | **Resolution** | Micron-level (μm) | | **Power Supply** | 18...30 V DC | --- ### 2. Key Electronic Components The internal architecture of the LMS-B4 series consists of several critical electronic subsystems: #### A. The CMOS/CCD Linear Array The heart of the sensor is a high-resolution optical receiver. When the laser hits an object, the reflected light is focused onto this array. The "B4" designation usually refers to the specific focal length or optical arrangement used to map pixels to distance. #### B. Digital Signal Processor (DSP) The sensor includes an onboard microcontroller or DSP that: * Calculates the center of the light spot on the array. * Converts pixel positions into engineering units (mm). * Filters out electronic noise and handles "ambient light suppression." #### C. Interface Circuitry Depending on whether it is the **R** or **Q** model: * **R (Communication):** Contains a UART/RS-232 transceiver chip to send digital data packets to a PLC or PC. * **Q (Analog/Discrete):** Contains a Digital-to-Analog Converter (DAC) and operational amplifiers to provide a steady voltage or current loop proportional to the distance. --- ### 3. Wiring and Pinout (M12 Connector) Most of these sensors use a standard M12 5-pin or 8-pin industrial connector. | Pin | Function | Description | | :--- | :--- | :--- | | 1 | L+ | +24V DC Supply | | 2 | Out 2 | Analog output or Serial RX | | 3 | M | 0V / Ground | | 4 | Out 1 | Switching output (PNP/NPN) or Serial TX | | 5 | Input | Laser Off / External Trigger | --- ### 4. Application Context The electronics are designed for rugged industrial environments, featuring: * **IP67 Protection:** Fully sealed electronics against dust and water. * **Reverse Polarity Protection:** Prevents damage if the power leads are swapped. * **Short Circuit Protection:** Protects the output transistors from overcurrent.