The **CRE10ROTL0S-R** is a specific part number for a **rotary coded switch**, typically manufactured by companies like Copal Electronics (Nidec). These components are used to manually set parameters or addresses in electronic circuits. --- ### 1. Component Specifications The following table breaks down the technical characteristics of the CRE series: | Feature | Specification | | :--- | :--- | | **Type** | Rotary Coded Switch | | **Output Code** | Real Binary Coded Decimal (BCD) | | **Number of Positions** | 10 Positions (0-9) | | **Actuator Style** | Rotor (usually flat or flush) | | **Mounting Type** | Surface Mount (SMD / SMT) | | **Contact Rating** | 100mA @ 5V DC (Switching) / 100mA @ 50V DC (Non-switching) | | **Orientation** | Top Actuated | --- ### 2. Pin Configuration and Operation This device converts a mechanical rotation into a digital output. As you turn the dial, the internal contacts close in a specific pattern to represent numbers in binary. * **Common Pin:** Connected to the input voltage or ground. * **Output Pins (1, 2, 4, 8):** These represent the bits. For example, if the dial is set to "3", pins 1 and 2 will be closed (1+2=3). * **BCD Logic Table:** * **Position 0:** All pins open. * **Position 5:** Pins 1 and 4 are closed. * **Position 9:** Pins 1 and 8 are closed. --- ### 3. Key Features * **Washable Construction:** Most CRE series switches are sealed (O-ring or tape), allowing them to withstand aqueous soldering and cleaning processes. * **Compact Design:** Designed for high-density PCB layouts where space is at a premium. * **Reliability:** Features gold-plated contacts to prevent oxidation and ensure a stable connection over time. --- ### 4. Common Applications These switches are rarely used for daily user interaction; they are intended for "set and forget" configurations: 1. **Address Setting:** Setting the ID of a device on a bus (like RS-485 or CAN bus). 2. **Mode Selection:** Choosing between different operating modes during installation. 3. **Industrial Controls:** Used in PLCs (Programmable Logic Controllers) for hardware configuration. ---