The **2RT-16-R2** is a specific type of **Rotary DIP Switch**. These components are widely used in industrial controls, telecommunications, and computer peripherals to set binary or hexadecimal values manually on a circuit board. --- ### 1. Technical Specifications The part number typically follows a standard convention for rotary switches. Below are the primary specifications: | Feature | Specification | | :--- | :--- | | **Switch Type** | Rotary DIP Switch | | **Positions** | 16 (Hexadecimal: 0-9, A-F) | | **Output Code** | Real Code (Binary Coded Hexadecimal) | | **Actuator Style** | Recessed / Arrow Flanged (requires screwdriver) | | **Mounting Type** | Through-Hole (THT) | | **Pitch** | 2.54mm (Standard 0.1") | | **Voltage Rating** | 24V DC (Switching), 50V DC (Non-switching) | | **Current Rating** | 100mA | --- ### 2. Physical Construction The "2RT" series is designed for durability and space-saving on a PCB (Printed Circuit Board). * **Housing:** Usually made of high-temperature liquid crystal polymer (LCP) or PBT plastic to withstand wave soldering. * **Contacts:** Gold-plated contacts are standard to ensure low contact resistance and prevent oxidation over long periods. * **Sealing:** Most "R2" variants feature an O-ring or epoxy seal, making them **washable**. This allows the PCB to be cleaned after soldering without damaging the switch internals. --- ### 3. Truth Table (16-Position Real Code) When you turn the dial, the internal pins connect to the "Common" pin to create a binary output. | Position | Pin 1 (1) | Pin 2 (2) | Pin 3 (4) | Pin 4 (8) | | :--- | :--- | :--- | :--- | :--- | | **0** | OFF | OFF | OFF | OFF | | **1** | **ON** | OFF | OFF | OFF | | **2** | OFF | **ON** | OFF | OFF | | **8** | OFF | OFF | OFF | **ON** | | **F (15)**| **ON** | **ON** | **ON** | **ON** | --- ### 4. Common Applications * **Address Setting:** Used in RS-485 or CAN bus nodes to give each device a unique ID (0-15). * **Mode Selection:** Choosing between different firmware operational modes. * **Configuration:** Setting baud rates or timeout intervals without needing a digital interface. ---