The **M2UDS-41-R2** is a specific electronic component typically categorized as a **Thumbwheel Switch** or a **Digital Pushwheel Switch**. These parts are used to manually input numerical values into a digital circuit (like a PLC or a control board) without needing a digital interface. Below is a detailed breakdown of its electronic characteristics and specifications. --- ## 1. Core Technical Specifications The "M2UDS" series is generally manufactured by companies like **Nidec Copal Electronics** (formerly COPAL). | Feature | Specification (Typical) | | :--- | :--- | | **Switch Type** | Thumbwheel / Pushwheel | | **Output Code** | BCD (Binary Coded Decimal) | | **Number of Positions** | 10 (0 through 9) | | **Contact Resistance** | 200 mΩ maximum | | **Insulation Resistance** | 100 MΩ minimum (at 250V DC) | | **Dielectric Strength** | 250V AC for 1 minute | | **Operating Voltage** | Up to 28V DC | | **Switching Current** | 0.1A (Non-switching current: 1A) | --- ## 2. Electronic Functionality: BCD Output The primary function of the M2UDS-41-R2 is to convert a mechanical position (0-9) into a 4-bit Binary Coded Decimal output. When you click the buttons to change the number on the display, the internal contacts close to represent that number in binary: | Displayed Digit | Binary Output (1-2-4-8 Pins) | | :--- | :--- | | **0** | 0 0 0 0 | | **1** | 1 0 0 0 | | **5** | 1 0 1 0 | | **9** | 1 0 0 1 | --- ## 3. Physical & Design Attributes * **Push-button Actuation:** The "UDS" variant typically uses a "plus" and "minus" button (or up/down buttons) to increment or decrement the number, rather than a rotating wheel. * **Snap-in Mounting:** Designed for panel mounting where multiple units can be snapped together to form a multi-digit number (e.g., a 3-digit timer setting). * **Termination:** Usually features PCB pins or solder terminals for integration into a control circuit. --- ## 4. Part Number Breakdown While manufacturer codes vary slightly, the R2 suffix often denotes specific mechanical or electrical revisions: * **M2:** Series identifier (Miniature size). * **UDS:** Push-button type. * **41:** Configuration code (often referring to BCD output and specific housing). * **R2:** Revision or RoHS compliance status. ---