The **M2RT-10-R2** is a specific model within the **M2RT series**, which are high-performance, miniature rotary switches often used in industrial controls and electronic instrumentation. Below is a breakdown of its technical specifications and electronic components. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Switch Type** | Rotary Switch | | **Number of Positions** | 10 Positions | | **Circuitry** | BCD (Binary Coded Decimal) or Decimal (model dependent) | | **Mounting Type** | Through-hole / PCB Mount | | **Voltage Rating** | 24V DC (Standard Logic Level) | | **Current Rating** | 100mA (Switching) / 100mA (Non-switching) | | **Actuator Style** | Screwdriver Slot (Flush) or Knob | --- ### 2. Internal Electronic Parts and Construction The reliability of the M2RT-10-R2 comes from its internal material composition: * **Contacts:** Usually made of **Gold-plated copper alloy**. Gold is used to prevent oxidation and ensure a stable electrical connection at low voltages (logic levels). * **Housing:** High-temperature thermoplastic (UL94V-0 rated). This allows the part to withstand wave soldering processes without melting. * **Wiper Mechanism:** A spring-loaded metal wiper that moves across a circular PCB trace pattern to complete circuits according to the selected position. * **Sealing:** The "R" in the suffix often denotes a **sealed construction** (using an O-ring or epoxy base), making it resistant to dust and cleaning flux during the manufacturing process. --- ### 3. Connection Diagram Logic The M2RT-10-R2 typically operates as a coded switch. For a 10-position BCD configuration, the output pins represent binary values: ```text Position | Pin 1 (1) | Pin 2 (2) | Pin 3 (4) | Pin 4 (8) | Common ----------------------------------------------------------------- 0 | OFF | OFF | OFF | OFF | - 1 | ON | OFF | OFF | OFF | C 2 | OFF | ON | OFF | OFF | C 9 | ON | OFF | OFF | ON | C ``` --- ### 4. Typical Applications * **Address Setting:** Used in industrial BUS systems (like RS-485 or CAN) to set a unique ID for a device. * **Mode Selection:** Selecting between 10 different firmware operating modes. * **Configuration:** Replacing jumper pins for more user-friendly hardware configuration. ---