The **KUS-C1-R** is an electronic component primarily classified as a **Slotted Optical Switch** (also known as a Photo Interrupter). It is commonly used for position sensing, speed detection, and end-of-travel switching in automated machinery. --- ### 1. Technical Specifications Below is a breakdown of the typical electronic characteristics for this series of optical sensors: | Parameter | Type | Typical Value | | :--- | :--- | :--- | | **Input (Emitter)** | Infrared LED | GaAs (Gallium Arsenide) | | **Output (Detector)** | Phototransistor | NPN Silicon | | **Forward Current ($I_F$)** | Input | 20mA - 50mA | | **Collector-Emitter Voltage ($V_{CEO}$)** | Output | 30V | | **Slot Width** | Physical | ~3mm to 5mm | | **Mounting Type** | PCB | Through-hole / Snap-in | --- ### 2. Operating Principle The device consists of two main electronic parts housed in a single plastic molded frame, separated by a gap (slot): 1. **The Infrared Emitter (LED):** Located on one side of the slot. When power is applied, it emits a constant beam of infrared light. 2. **The Photodetector (Phototransistor):** Located on the opposite side. It stays in a "conducting" state as long as it receives light from the LED. 3. **The Switching Action:** When an opaque object (like a gear tooth or a metal flag) enters the slot, it blocks the light. This causes the phototransistor to stop conducting, changing the output signal from **Low to High** (or vice versa, depending on the circuit design). --- ### 3. Connection Diagram (Standard 4-Pin) Most KUS-C1-R modules utilize a 4-pin configuration: ```text Pin 1: Anode (+) -> Connect to VCC via Resistor Pin 2: Cathode (-) -> Connect to Ground (GND) Pin 3: Collector (C) -> Signal Output (Pull-up) Pin 4: Emitter (E) -> Connect to Ground (GND) ``` ### 4. Typical Applications * **Printer Carriage Positioning:** Detecting the home position of the print head. * **Encoders:** Counting pulses from a rotating disk to measure motor speed. * **Paper Sensing:** Detecting the presence or absence of paper in office equipment. * **Industrial Safety:** Acting as a non-contact limit switch. ---