The **M5RS-11-R** is a specific model within the **M5RS Series** of industrial-grade rotary switches, typically manufactured by companies like **Copal Electronics** (now Nidec Components). These components are designed for PCB mounting and provide binary-coded outputs. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Code Type** | Real Code (Binary Coded Decimal - BCD) | | **Number of Positions** | 10 Positions (0-9) | | **Terminal Layout** | 3-3 Terminal (Standard Through-hole) | | **Actuator Style** | Recessed (Screwdriver slot) | | **Voltage Rating** | 50V DC (Max) | | **Switching Current** | 100mA | | **Operating Temperature** | -25°C to +70°C | --- ### 2. Electronic Structure and Pinout The "11" in the part number indicates the **Real Code** configuration. In this setup, the switch functions as a hardware encoder that converts the physical position of the dial into a 4-bit binary signal. #### Truth Table (BCD Real Code) | Position | C (Common) | 1 ($2^0$) | 2 ($2^1$) | 4 ($2^2$) | 8 ($2^3$) | | :--- | :--- | :--- | :--- | :--- | :--- | | **0** | ON | OFF | OFF | OFF | OFF | | **1** | ON | **ON** | OFF | OFF | OFF | | **2** | ON | OFF | **ON** | OFF | OFF | | **3** | ON | **ON** | **ON** | OFF | OFF | | ... | ... | ... | ... | ... | ... | | **9** | ON | **ON** | OFF | OFF | **ON** | --- ### 3. Component Characteristics * **Miniature Form Factor:** Designed for space-constrained PCB applications. * **Wiping Contact Mechanism:** The internal contacts "wipe" across the pads during rotation, which helps remove oxidation and ensures high reliability over the component's lifespan. * **Environmental Protection:** These switches are usually washable (sealed), allowing them to withstand wave soldering and board washing processes. * **Detent Torque:** Provides a tactile "click" to ensure the switch settles precisely on a specific number, preventing ambiguous signals. --- ### 4. Typical Applications The M5RS-11-R is used in electronics where a technician needs to set a static value or address without a digital interface: 1. **Device Addressing:** Setting unique IDs for sensors on a bus (e.g., RS-485 or CAN bus). 2. **Configuration Settings:** Selecting operating modes for industrial controllers. 3. **Timer/Counter Presets:** Manually setting hardware thresholds on a circuit board. ---