The **TCS-24-R/BL** is a specialized electronic component, typically categorized as a **Touchless Contactless Sensor** (often used in exit buttons, capacitive switches, or industrial control panels). The "R/BL" suffix generally denotes the visual feedback configuration (Red/Blue LED indicators). Below is a breakdown of its electronic components and technical specifications. --- ## 1. Core Technical Specifications The device operates as a solid-state proximity sensor, replacing mechanical buttons to improve hygiene and longevity. | Feature | Specification | | :--- | :--- | | **Input Voltage** | 12V - 24V DC | | **Current Consumption** | ~30mA (Standby) / ~60mA (Active) | | **Output Type** | Relay Output (Dry Contact) / N.O. or N.C. | | **Sensing Range** | 5cm to 20cm (Adjustable) | | **Contact Rating** | 1A @ 30V DC / 0.5A @ 125V AC | | **Indication Colors** | Red (Standby/Power) & Blue (Activated) | --- ## 2. Key Electronic Internal Parts ### A. Infrared (IR) Sensor Module The heart of the unit consists of an **IR Emitter** and an **IR Receiver**. * **Emitter:** Sends out a modulated infrared beam. * **Receiver:** Detects the reflection when a hand or object comes within range. * **MCU (Microcontroller):** Processes the signal to prevent "false triggers" from ambient light or sunlight. ### B. Switching Circuitry Unlike mechanical buttons, this uses an electronic switch. * **Electromechanical Relay:** Provides the "click" and physical contact closure for high-voltage or signal compatibility. * **Transistor/MOSFET Driver:** Acts as the bridge between the low-power MCU signal and the relay coil. ### C. Visual Feedback (LEDs) * **Dual-Color LED Ring:** The "R/BL" designation stands for **Red and Blue**. * **Logic:** Usually, the ring glows **Red** while in standby mode and switches to **Blue** (or vice versa depending on wiring) when the sensor is triggered. --- ## 3. Wiring Configuration The device usually features a 5-wire harness or terminal block: 1. **Red (+):** Positive Power Input (12-24V). 2. **Black (-):** Ground/GND. 3. **Yellow (COM):** Common terminal for the relay. 4. **White (N.O.):** Normally Open contact. 5. **Green (N.C.):** Normally Closed contact. --- ## 4. Operational Advantages * **Durability:** No moving parts mean the button does not wear out over millions of cycles. * **IP Rating:** Most TCS-24 models are rated **IP65**, protecting the internal electronics from moisture and dust. * **Safety:** The touchless nature prevents the spread of pathogens (essential for hospitals and cleanrooms).