The **TCS-3E-R/BL** is a high-performance industrial-grade color sensor module manufactured by **TOKYO SENSOR** (often integrated into systems by partners like Takex or Seeed). It is primarily used for high-speed color detection and sorting in automated production lines. --- ### 1. Core Electronic Specifications The "R/BL" designation typically refers to the light source configuration (Red/Blue/Green LEDs) or specific output logic. Below are the standard electronic parameters: | Feature | Specification | | :--- | :--- | | **Supply Voltage** | 12V to 24V DC (±10% ripple) | | **Current Consumption** | 40mA or less | | **Light Source** | RGB 3-color LED (Red, Green, Blue) | | **Output Type** | NPN or PNP Open Collector (depending on wiring) | | **Response Time** | 1ms or less (High speed) | | **Control Output** | Max 100mA (at 30V DC) | | **Sensitivity Adjustment** | 1-turn potentiometer or Teach-in button | --- ### 2. Key Electronic Components The internal architecture of the TCS-3E-R/BL consists of several critical stages: #### A. The Optical Emitter Unlike simple photo-eyes, this unit contains a **tri-color LED array**. It sequentially pulses Red, Green, and Blue light onto the target surface. By measuring the reflection of each specific wavelength, the sensor calculates the exact "color signature." #### B. The Photodiode Receiver A high-sensitivity silicon photodiode captures the reflected light. It is paired with an **IR-cut filter** to ensure that infrared heat from the environment does not interfere with the visible color readings. #### C. Signal Processing Circuitry * **Transimpedance Amplifier:** Converts the tiny current from the photodiode into a measurable voltage. * **Comparator Circuit:** Compares the measured RGB ratio against the "taught" or stored reference value. * **Logic Controller:** Determines if the detected color matches the target within a set tolerance window. --- ### 3. Wiring and Pinout Configuration The sensor usually employs a standard 4-wire or 5-wire color-coded cable: | Wire Color | Function | Description | | :--- | :--- | :--- | | **Brown** | +V | Positive Power Supply (12-24V) | | **Blue** | 0V | Common Ground | | **Black** | Output | Control Signal (Triggers when color matches) | | **Pink/White** | Remote Teach | External input for setting target color | --- ### 4. Operational Features * **Color Registration:** The "R/BL" series is optimized for detecting registration marks on packaging films, even if the background is shiny or metallic. * **Stability:** Features internal temperature compensation to prevent "drift" in color detection as the factory floor heats up. * **Protection:** The electronics are usually encased in a resin-filled housing (IP67 rated) to protect against vibration, dust, and moisture. ---