The **M2RT-04-R** is a specific model of a **Rotary DIP Switch** typically manufactured by components suppliers like **E-Switch** or similar industrial electronics providers. It is designed to convert rotational position into a binary-coded output for circuit configuration. --- ### 1. General Specifications The "M2RT" series generally refers to sub-miniature rotary switches designed for PCB mounting. | Parameter | Typical Value | | :--- | :--- | | **Switch Type** | Rotary DIP Switch | | **Positions** | 4 Positions (usually 0, 1, 2, 3) | | **Output Code** | Real Binary (or BCD depending on variant) | | **Mounting Type** | Through-Hole (R usually denotes Right-Angle or Specific Packaging) | | **Contact Rating** | 100mA @ 5VDC (Switching); 100mA @ 50VDC (Non-switching) | | **Operating Force** | 400 gf·cm | --- ### 2. Key Electronic Components & Features #### A. Actuator Style The "R" in the suffix often indicates a **Raised Actuator** (knob-style) or a **Right Angle** orientation. This allows the user to change settings using a small screwdriver or fingers without needing to open a complex housing. #### B. Contact Mechanism * **Gold-Plated Contacts:** Most high-quality DIP switches use gold plating to prevent oxidation, ensuring high reliability over long periods of inactivity. * **Wiping Action:** The internal contacts "wipe" across the pads when turned, which helps clear away dust and ensures a solid electrical connection. #### C. Coding Logic The switch translates the physical position into 2-bit or 4-bit logic. For a 4-position switch: * **Position 0:** All pins Open (00) * **Position 1:** Pin 1 Closed (01) * **Position 2:** Pin 2 Closed (10) * **Position 3:** Pins 1 & 2 Closed (11) --- ### 3. Pin Configuration (Example) Typically, these switches have a common pin and several output pins. ```markdown [ TOP VIEW ] ( 1 ) ( 2 ) <-- Output Pins | | [S W I T C H] | | ( C ) ( C ) <-- Common Pins (Internal Connection) ``` --- ### 4. Common Applications * **Address Setting:** Setting the unique ID for a device on a bus (like RS-485 or DMX). * **Mode Selection:** Choosing between different firmware modes (e.g., Test Mode vs. Operation Mode). * **Configuration:** Adjusting hardware parameters without needing a digital interface or display. ---