The **M2UDS-34-R2** is a specific model of a **Rotary DIP Switch** (Dual In-line Package). These components are commonly used in electronics to set binary-coded values or manual configurations on a printed circuit board (PCB) without needing external software. --- ### 1. Technical Specifications The "M2UDS-34-R2" typically follows a standard industry naming convention for rotary switches. Below is a breakdown of its key electronic characteristics: | Feature | Specification | | :--- | :--- | | **Switch Type** | Rotary DIP Switch | | **Positions** | 10 (Decimal) or 16 (Hexadecimal) | | **Coding** | Real Code (Binary Coded Decimal/Hex) | | **Actuator Style** | Sunk / Flat Type (requiring a screwdriver) | | **Mounting Type** | Surface Mount (SMD) or Through-Hole (depending on series) | | **Voltage Rating** | Switching: 5V - 24V DC / Non-switching: 50V DC | | **Current Rating** | Switching: 100mA / Non-switching: 400mA | --- ### 2. Functional Description The part functions as a **4-bit digital encoder**. As you rotate the dial, it creates specific electrical connections between the common pin and the output pins (1, 2, 4, and 8). #### Internal Logic Table (Example) | Dial Position | Pin 1 (1) | Pin 2 (2) | Pin 3 (4) | Pin 4 (8) | | :--- | :--- | :--- | :--- | :--- | | **0** | Open | Open | Open | Open | | **1** | Closed | Open | Open | Open | | **2** | Open | Closed | Open | Open | | **3** | Closed | Closed | Open | Open | | **...** | ... | ... | ... | ... | --- ### 3. Connection Diagram (General) In a typical circuit, the "Common" pin is connected to Ground (GND) or VCC, and the four output pins are connected to a microcontroller with pull-up or pull-down resistors. ```cpp // Example: Reading a Rotary DIP switch in Arduino int pin1 = 2; // Bit 0 int pin2 = 3; // Bit 1 int pin4 = 4; // Bit 2 int pin8 = 5; // Bit 3 void setup() { pinMode(pin1, INPUT_PULLUP); pinMode(pin2, INPUT_PULLUP); pinMode(pin4, INPUT_PULLUP); pinMode(pin8, INPUT_PULLUP); } ``` --- ### 4. Common Applications * **Address Setting:** Assigning a unique ID to a device on a bus (e.g., RS-485 or DMX networks). * **Mode Selection:** Choosing between different operating modes (e.g., Baud rate, Test mode). * **Industrial Controls:** Hard-coding settings that should not be easily changed by end-users.