The **FLCS-32-R/K** is a high-performance **Fiber Optic Limit Switch** manufactured by **Azbil (formerly Yamatake)**. It is primarily used in industrial automation where standard electrical limit switches would fail due to electromagnetic interference (EMI), explosive atmospheres, or high temperatures. --- ## 1. Technical Specifications Below are the core electronic and physical specifications of the FLCS-32-R/K series: | Parameter | Specification Details | | :--- | :--- | | **Model Type** | Fiber Optic Limit Switch (R: Standard / K: High Sensitivity) | | **Light Source** | Infrared LED (approx. 880 nm) | | **Output Type** | Relay Output (Form C) or Solid State | | **Supply Voltage** | 24V DC (typical range 12-24V) | | **Operating Mode** | Light-ON / Dark-ON (Selectable) | | **Enclosure Rating** | IP67 (Dust-tight, immersion resistant) | | **Fiber Material** | Plastic or Glass (depending on the attached cable) | --- ## 2. Key Electronic Components ### A. Photoelectric Conversion System The "FLCS" system consists of an **Amplifier Unit** and a **Fiber Optic Cable**. * **The Emitter:** Contains an LED that converts electrical pulses into light pulses. * **The Receiver:** Contains a photodiode that converts received light back into an electrical signal. * **Signal Processor:** An internal ASIC (Application-Specific Integrated Circuit) filters out ambient light noise to prevent false triggering. ### B. Input/Output (I/O) Logic * **R-Series (Standard):** Designed for general-purpose sensing with a focus on stability and durability. * **K-Series (High Sensitivity):** Features enhanced gain circuitry to detect smaller objects or work through thinner fiber cables over longer distances. * **Response Time:** Usually ranges between **1ms to 5ms**, making it suitable for high-speed counting or positioning. --- ## 3. Advantages of the FLCS Design The electronic design provides three major advantages: 1. **Passive Sensing Head:** There are no electronic components in the sensing head (the part that touches the machine). Only light travels through the fiber, making it **intrinsically safe** for hazardous areas. 2. **Noise Immunity:** Since the "wiring" between the sensor head and the amplifier is glass/plastic fiber, it is completely immune to **Electrical Noise (EMI/RFI)** from motors or welders. 3. **Space Efficiency:** The electronic amplifier can be mounted in a control panel several meters away from the actual sensing point. --- ## 4. Wiring Diagram Overview While specific terminal numbers may vary by sub-version, the standard wiring follow this logic: ```markdown Terminal 1: +V (Brown) -> 24V DC Supply Terminal 2: 0V (Blue) -> Common Ground Terminal 3: Control Output (Black) -> To PLC Input / Load Terminal 4: Stability/Alarm Output (Pink/Orange) -> Signal for low light levels ``` ---