The **CD10RL1AB-R** is a specific model of a **Rotary Coded DIP Switch** manufactured by **Copal Electronics** (now part of Nidec Components). These components are used to manually set binary or hexadecimal values on a circuit board. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Type** | Rotary Coded DIP Switch | | **Number of Positions** | 10 Positions (0-9) | | **Output Code** | Real Binary Coded Decimal (BCD) | | **Actuator Type** | Flush (Screwdriver slot) | | **Orientation** | Right Angle (Side-actuated) | | **Mounting Type** | Through-Hole | | **Contact Rating** | 100mA @ 5V DC (Switching); 100mA @ 50V DC (Non-switching) | --- ### 2. Physical Design and Packaging * **Right Angle (R):** The "R" in the suffix indicates it is a right-angle mount. This means the dial is positioned on the side of the PCB, allowing for adjustment from the edge of an enclosure. * **Real Code:** In a "Real" BCD code, the switch connects specific pins to the common pin to represent the number selected (e.g., selecting '1' closes the circuit for the $2^0$ bit). * **Sealed Construction:** These parts are typically "washable," meaning they are sealed with an O-ring or tape to protect the internal contacts during the soldering and board-washing process. --- ### 3. Pin Configuration and Truth Table For a 10-position BCD switch, there are typically 5 pins: one **Common (C)** pin and four data pins representing **1, 2, 4, and 8**. #### BCD Truth Table Example: | Position | Pin 1 ($2^0$) | Pin 2 ($2^1$) | Pin 4 ($2^2$) | Pin 8 ($2^3$) | | :--- | :--- | :--- | :--- | :--- | | **0** | Open | Open | Open | Open | | **1** | **Closed** | Open | Open | Open | | **3** | **Closed** | **Closed** | Open | Open | | **9** | **Closed** | Open | Open | **Closed** | --- ### 4. Common Applications * **Address Setting:** Used to set unique IDs for devices on a communication bus (like RS-485 or CAN bus). * **Configuration:** Selecting operating modes or baud rates on industrial equipment. * **Internal Presets:** Setting limit values or timer intervals on a PCB where a full digital interface is not required.