The **FVS-JB-R/Q** refers to a specific series of high-precision fiber optic sensors, typically manufactured by companies like **Keyence** or **Panasonic (Sunx)**. These devices are used in industrial automation for detecting small objects or measuring displacement. Below is an explanation of the electronic components and technical specifications for this series. --- ### 1. Core Electronic Components The device consists of several critical internal stages that process light signals into electrical outputs: | Component | Function | | :--- | :--- | | **Emitter (LED)** | Usually a Red or Infrared LED that pulses light through the fiber optic cable. | | **Receiver (Photodiode)** | Converts the returning light intensity into a small electrical current. | | **Amplifier IC** | Boosts the weak photodiode signal for processing. | | **Microprocessor** | Handles logic, threshold settings, and timer functions (On-delay/Off-delay). | | **Output Stage** | Transistor-based switching (NPN or PNP) to communicate with a PLC. | --- ### 2. Technical Specifications The "R" and "Q" designations often refer to the output type or connector style. | Feature | Specification Details | | :--- | :--- | | **Supply Voltage** | 12 to 24 VDC (±10% ripple) | | **Output Type** | **NPN** (Sink) or **PNP** (Source) open-collector | | **Response Time** | Typically 250 µs to 1 ms (High-speed vs. Standard mode) | | **Control Output** | 100 mA max at 30 VDC | | **Protection Circuit** | Reverse polarity protection, overcurrent protection | --- ### 3. Wiring Configuration Most FVS-series sensors use a standard 3-wire or 4-wire color code for the electronic interface: ```yaml Brown: +V (12-24V DC Power) Blue: 0V (Ground) Black: Control Output (Load connection) White: External Input (Remote Teach or Calibration) ``` ### 4. Key Electronic Features * **Dual Digital Display:** Most modern versions (like the FVS-JB-Q) feature a red/green LED display showing the current received light intensity versus the set threshold. * **Sensitivity Adjustment:** Electronic "Teach-in" buttons allow the user to set the switching threshold digitally rather than using a manual potentiometer. * **Hysteresis Control:** Internal logic prevents "chatter" (rapid switching) when an object is at the edge of the detection range. ---