The **HRS-44-R** refers to a specific series of **Rotary Dips** or **Rotary Selectors**, commonly manufactured by brands like *Hartmann* (part of the Phoenix Mecano group) or similar electronic component manufacturers. These components are used to set binary or hexadecimal values manually on a PCB (Printed Circuit Board). --- ## 1. Technical Specifications The "44" and "R" in the part number typically denote the specific mechanical and electrical configuration of the switch. | Parameter | Typical Value / Description | | :--- | :--- | | **Switch Type** | Rotary Code Switch | | **Output Code** | BCD (Binary Coded Decimal) or Hexadecimal | | **Number of Positions** | 10 (0-9) or 16 (0-F) | | **Mounting Type** | Through-hole (THT) or Surface Mount (SMT) | | **Actuator Style** | Arrow-shaped slot / Flush or Extended shaft | | **Contact Rating** | 100mA at 50V DC (Non-switching) / 100mA at 5V DC (Switching) | --- ## 2. Pin Configuration and Logic The HRS-44-R series is designed to output a digital signal based on the physical position of the rotor. ### Terminal Layout Usually, these devices have 5 pins: 1. **Common (C):** The input voltage or ground pin. 2. **1 (2^0):** Least Significant Bit (LSB). 3. **2 (2^1):** Second bit. 4. **4 (2^2):** Third bit. 5. **8 (2^3):** Most Significant Bit (MSB). ### Binary Example (Position 7) If the switch is set to "7", the logic pins will connect to the Common pin as follows: * Pin 1: **High** * Pin 2: **High** * Pin 4: **High** * Pin 8: **Low** *(Result: 1+2+4 = 7)* --- ## 3. Key Electronic Features * **Gold-Plated Contacts:** Ensures low contact resistance and prevents oxidation over long periods of inactivity. * **Sealed Construction:** Most "R" variants are wash-tight (IP67 rated), meaning they can undergo wave soldering and aqueous cleaning without internal contamination. * **Detent Mechanism:** Provides a tactile "click" to ensure the switch sits perfectly on the intended value, preventing ambiguous readings between positions. --- ## 4. Common Applications These parts are rarely interacted with by the end-user. Instead, they are used by technicians for: * **Address Setting:** Setting the unique ID for a device on a bus (e.g., RS-485 or CAN bus). * **Mode Selection:** Configuring hardware parameters (like baud rate or operating mode) without needing a screen or software interface. * **Industrial Controls:** PLCs and motor drives often use these for manual calibration. ---