The **6321-R** typically refers to a specific series of **Rotary DIP Switches** manufactured by companies like **Copal Electronics** (Nidec) or similar electronic component suppliers. These are miniature electromechanical components used to set binary or decimal values on a circuit board manually. --- ### 1. Key Technical Specifications The "R" suffix usually denotes a specific packaging style (like **Tape & Reel**) or a **Right-Angle** mounting orientation. | Feature | Specification (Typical) | | :--- | :--- | | **Switch Type** | Rotary DIP Switch | | **Positions** | 10 (0-9) or 16 (0-F) | | **Code Type** | Binary Coded Decimal (BCD) or Hexadecimal | | **Contact Rating** | 100mA at 5V DC (Switching) / 100mA at 50V DC (Non-switching) | | **Mounting Type** | Through-hole or SMD (Depending on variant) | | **Operating Temp** | -40°C to +85°C | --- ### 2. Physical Construction The 6321-R series is designed for durability and precision. Here are the primary parts involved: * **Rotor:** The top dial that the user turns (using a screwdriver) to select a value. * **Contacts:** Internal gold-plated or silver-plated copper alloy pins that complete the circuit based on the rotor position. * **Housing:** High-temperature plastic (often PPS or LCP) designed to withstand wave soldering or reflow processes. * **Base:** The bottom section containing the pins (terminals) that connect to the PCB. --- ### 3. Binary Coding Logic These switches convert the physical position of the dial into a digital output. For a 10-position BCD switch, the logic follows this pattern: | Position | Pin 1 (1) | Pin 2 (2) | Pin 3 (4) | Pin 4 (8) | | :--- | :--- | :--- | :--- | :--- | | **0** | OFF | OFF | OFF | OFF | | **1** | **ON** | OFF | OFF | OFF | | **5** | **ON** | OFF | **ON** | OFF | | **9** | **ON** | OFF | OFF | **ON** | --- ### 4. Common Applications * **Address Setting:** Used in industrial automation (PLC modules) to set the unique ID of a device on a network. * **Configuration:** Selecting modes of operation for appliances or telecommunication equipment without needing a software interface. * **Prototyping:** Testing different logic states quickly during circuit design. --- ### 5. Part Number Breakdown (Example) While specific manufacturers vary, a standard breakdown for a part like `S-6321-R` looks like this: 1. **63:** Series identifier (size/type). 2. **2:** Number of positions (e.g., 10 or 16). 3. **1:** Rotor shape (Flat vs. Shaft). 4. **R:** Packaging (RoHS compliant or Reel) or Right-angle orientation.