The **M2PP-25N-R/N** is a specific model of an industrial **Non-Illuminated Square Pushbutton Switch**, typically manufactured by **Omron Industrial Automation**. Below is a detailed breakdown of its electronic and mechanical parts. --- ### 1. Part Number Breakdown Understanding the alphanumeric code helps identify the specific configuration: | Segment | Code | Meaning | | :--- | :--- | :--- | | **Series** | M2P | Miniature Square Pushbutton Series | | **Mounting** | P | Panel Mount (Plug-in/Solder terminals) | | **Size** | 25 | Standard Square Size (approx. 25mm) | | **Illumination** | N | **Non-Illuminated** (No lamp or LED) | | **Operation** | R | **Momentary** (Springs back when released) | | **Contact** | N | SPDT (Single Pole Double Throw) | --- ### 2. Core Electronic Components #### A. Contact Block (Switching Mechanism) The "business end" of the switch consists of a Single Pole Double Throw (SPDT) arrangement. * **Common (COM):** The input terminal. * **Normally Open (NO):** Circuit closes only when the button is pressed. * **Normally Closed (NC):** Circuit is closed by default and opens when pressed. * **Ratings:** Typically rated for **5A at 125VAC** or **3A at 250VAC**, making it suitable for control circuits rather than heavy power loads. #### B. Terminals The rear of the unit features gold-plated or silver-alloy terminals. * **Connection Type:** Solder terminals (can also be used with compatible quick-connect sockets). * **Material:** Designed for high conductivity and oxidation resistance. #### C. Mechanical Actuator * **Momentary Action:** Contains an internal precision spring that returns the button to its original position immediately after the user stops applying pressure. * **Stroke:** Features a tactile click to provide user feedback. --- ### 3. Physical & Material Specifications | Feature | Specification | | :--- | :--- | | **Shape** | Square (M2 Series) | | **Bezel** | Black plastic housing | | **Button Color** | Varies (usually specified by a suffix, e.g., R=Red, G=Green, Y=Yellow) | | **Mounting Hole** | Standardized for industrial panels | | **IP Rating** | Usually IP40 (protected against tools/wires, not waterproof) | --- ### 4. Typical Applications Because this is a non-illuminated, momentary switch, it is commonly used for: 1. **Reset Buttons:** Clearing errors on a control panel. 2. **Logic Inputs:** Sending a signal to a PLC (Programmable Logic Controller). 3. **Testing/Calibration:** Manually triggering a sequence during machine setup.