The **M2REB-S24-R** is a specific model within a series of industrial electromechanical components, typically associated with **rotary encoders** or **rotary switches** used in automation and control systems. Below is a detailed breakdown of its electronic characteristics and specifications. --- ### 1. General Specifications The part is generally classified as a **Manual Pulse Generator (MPG)** or a **Rotary Encoder Switch**, often used for CNC machinery or digital volume/parameter control. | Feature | Specification | | :--- | :--- | | **Type** | Incremental Rotary Encoder | | **Pulses Per Revolution (PPR)** | 24 Pulses | | **Output Signal** | 2-phase (A and B phase) | | **Supply Voltage** | 5V DC (Typical) | | **Switch Integration** | Integrated Push-button (Momentary) | | **Mounting Type** | Through-hole (PCB) or Panel Mount | --- ### 2. Key Electronic Components #### A. Incremental Output (Quadrature Encoding) The "24" in the part number signifies 24 pulses per 360-degree rotation. It utilizes **Quadrature Encoding**, meaning: * **Phase A and Phase B:** Two signals are outputted, offset by 90 degrees. * **Direction Sensing:** By comparing which phase leads (A before B or vice versa), the controller determines if the knob is turning clockwise or counter-clockwise. #### B. Integrated Momentary Switch The "S" in the part number usually indicates a "Switch." * **Function:** Pressing the shaft downwards closes a separate circuit. * **Usage:** Often used for "Enter" or "Select" functions in a user interface. #### C. Detent Mechanism This part typically features **mechanical detents** (clicks). * The user feels a tactile "click" for every pulse, ensuring precise incremental adjustments. --- ### 3. Pinout Configuration While exact pin layouts can vary by manufacturer (such as Mitsumi or Alps styles), the standard 24-pulse encoder with a switch usually follows this 5-pin logic: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | Terminal A | Output signal for Phase A | | **2** | Common (GND) | Ground connection for the signals | | **3** | Terminal B | Output signal for Phase B | | **4** | Switch (S1) | Terminal for the push-button switch | | **5** | Switch (S2) | Common/Second terminal for the switch | --- ### 4. Typical Application Circuit To interface this with a microcontroller (like an Arduino or PLC), pull-up resistors are required because the part acts as a mechanical switch. ```cpp // Example Arduino logic for reading M2REB-S24-R int pinA = 2; int pinB = 3; void setup() { pinMode(pinA, INPUT_PULLUP); // External or internal pull-up required pinMode(pinB, INPUT_PULLUP); } ``` ---