The **M2ADS-111-R** is a specific part number belonging to a series of **Rotary DIP Switches** manufactured by **Diptronics Manufacturing Inc.** These components are widely used in electronics for setting binary or hexadecimal addresses or configurations on a printed circuit board (PCB). --- ## Technical Specifications | Feature | Specification | | :--- | :--- | | **Component Type** | Rotary DIP Switch | | **Positions** | 10 Positions (BCD - Binary Coded Decimal) | | **Output Code** | Real Code (0-9) | | **Actuator Style** | Arrow/Slot type (Flush) | | **Mounting Type** | Surface Mount (SMD / SMT) | | **Terminal Type** | Gull-wing (S-Type) | | **Electrical Rating** | 100mA, 50V DC (Steady); 25mA, 24V DC (Switching) | | **Operating Force** | 400 gf-cm Max. | --- ### Key Internal Parts and Construction 1. **Housing:** Made of high-temperature thermoplastic (usually LCP), designed to withstand the heat of infrared (IR) reflow soldering. 2. **Rotor:** The rotating element with a slot that allows a user to change the setting using a small screwdriver. 3. **Contacts:** Gold-plated contacts ensure low contact resistance and high reliability over the component's lifespan. 4. **Terminals:** The "Gull-wing" lead design allows the part to be soldered directly onto the surface of a PCB, saving space compared to through-hole versions. --- ### Logic Table (Real Code) In a **Real Code** configuration like the M2ADS-111-R, the pins connect to the Common (C) pin based on the binary value of the number selected: | Dial Position | Pin 1 (1) | Pin 2 (2) | Pin 4 (4) | Pin 8 (8) | | :---: | :---: | :---: | :---: | :---: | | 0 | OFF | OFF | OFF | OFF | | 1 | **ON** | OFF | OFF | OFF | | 2 | OFF | **ON** | OFF | OFF | | 5 | **ON** | OFF | **ON** | OFF | | 9 | **ON** | OFF | OFF | **ON** | --- ### Common Applications * **Industrial Automation:** Setting Modbus or CAN bus node IDs. * **Telecommunications:** Configuring hardware settings without software intervention. * **Security Systems:** Manual address setting for sensors or cameras. * **Peripherals:** Setting default modes on computer expansion cards or MIDI devices.