Based on technical specifications for industrial electronic components, the **FTG-11-R** typically refers to a specific model of a **Fork-type Photoelectric Sensor** (often associated with brands like Takenaka/Selet or similar industrial automation manufacturers). Below is a detailed breakdown of its electronic characteristics and components. --- ### 1. General Specifications The FTG-11-R is an optical sensor where the transmitter and receiver are housed in a single "U" shaped (fork) body. This design eliminates the need for alignment. | Feature | Specification | | :--- | :--- | | **Sensing Method** | Through-beam (Infrared LED) | | **Output Type** | NPN or PNP (Model dependent, usually Open Collector) | | **Operation Mode** | Light-ON / Dark-ON (Selectable via wiring) | | **Response Time** | Typically < 1ms | | **Supply Voltage** | 12 to 24V DC (±10% ripple) | | **Current Consumption** | ~30mA or less | --- ### 2. Key Electronic Components The internal circuitry consists of several critical stages: #### A. The Emitter (Transmitter) * **Infrared LED:** Emits a modulated beam of light across the fork gap. * **Oscillator Circuit:** Pulses the LED at a specific frequency to ensure the receiver ignores ambient sunlight or room lighting. #### B. The Receiver * **Phototransistor/Photodiode:** Captures the light from the emitter. * **Band-pass Filter:** An electronic filter that only allows the specific frequency of the internal oscillator to pass, preventing false triggers. * **Comparator/Schmitt Trigger:** Converts the analog signal from the photodiode into a sharp "High" or "Low" digital signal. #### C. Output Stage * **Protection Diodes:** Includes reverse polarity protection and surge suppression. * **Indicator LED:** Usually a red or green LED on the housing to show the current switching status (Logic status). --- ### 3. Wiring Configuration Most FTG series sensors use a standard 3-wire or 4-wire color code system: ```yaml Brown: Positive (+V) 12-24VDC Blue: Negative (0V / GND) Black: Control Output (Signal) White: Mode Selection (Light-ON/Dark-ON toggle) ``` --- ### 4. Application Logic The electronic "Logic" of the FTG-11-R is determined by whether the infrared beam is broken: 1. **Object Absent:** Light reaches the receiver -> Output remains in default state. 2. **Object Present:** Beam is blocked -> Circuitry triggers the output transistor to switch the load.