The **M2UDS-10-R** is a specific model within a series of **Rotary DIP Switches**. These components are used to manually set binary or hexadecimal values on a circuit board, often for addressing or mode selection. ### 1. Key Technical Specifications The "10" in the part number typically signifies the number of positions (Real Binary Code), while the "R" often refers to the packaging or specific actuator style. | Feature | Specification | | :--- | :--- | | **Component Type** | Rotary DIP Switch | | **Number of Positions** | 10 (Decimal/BCD 0-9) | | **Output Code** | Binary Coded Decimal (BCD) | | **Actuator Type** | Flat / Screwdriver Slot (Recessed) | | **Mounting Type** | Surface Mount (SMD) or Through-Hole (Model dependent) | | **Contact Rating** | 100mA at 5V DC (Switching), 100mA at 50V DC (Steady State) | | **Operating Temp** | -25°C to +70°C | --- ### 2. Physical Construction and Pins The M2UDS-10-R generally follows a standard footprint for rotary switches: * **Housing:** High-temperature plastic (Liquid Crystal Polymer) suitable for reflow soldering. * **Contacts:** Gold-plated contacts to prevent oxidation and ensure reliable signal transmission. * **Pinout:** Usually consists of 1 "Common" pin and 4 "Output" pins ($2^0, 2^1, 2^2, 2^3$). * **Sealing:** Often features an O-ring or integrated seal to protect the internals during flux cleaning/washing processes. --- ### 3. Truth Table (BCD 10-Position) When the dial is turned to a specific number, the internal mechanism connects the Common (C) pin to specific output pins. | Dial Position | Pin 1 ($2^0$) | Pin 2 ($2^1$) | Pin 4 ($2^2$) | Pin 8 ($2^3$) | | :--- | :---: | :---: | :---: | :---: | | **0** | OFF | OFF | OFF | OFF | | **1** | **ON** | OFF | OFF | OFF | | **5** | **ON** | OFF | **ON** | OFF | | **9** | **ON** | OFF | OFF | **ON** | --- ### 4. Common Applications * **Industrial Automation:** Setting the Modbus or CANbus ID for a sensor or actuator. * **Networking:** Configuring sub-channels or node addresses on a physical layer. * **Testing:** Manually toggling hardware modes during firmware debugging. * **Appliances:** Selecting preset configuration profiles during installation.