The **M2TS-ND-R/K** is a specific model within the **M2TS Series** of 22mm industrial push-button switches, typically manufactured by companies like **Omron** or similar industrial control providers. This particular model is an **Emergency Stop (E-Stop)** or a specialized tactile control switch. Below is a breakdown of its electronic and mechanical specifications. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Mounting Diameter** | 22 mm (Standard Industrial Size) | | **Action Type** | Non-Illuminated, Manual Reset/Momentary (Depending on suffix) | | **Contact Configuration** | Typically DPST (Double Pole Single Throw) | | **Rated Voltage** | 250V AC / 125V DC | | **Current Rating** | 5A to 10A (Load dependent) | | **Ingress Protection** | IP65 (Oil-resistant/Dust-tight) | | **Operating Temperature** | -20°C to +70°C | --- ### 2. Suffix Breakdown (R/K) The letters at the end of the model number define the physical and electrical behavior: * **R (Red):** Indicates the color of the actuator (button head). In industrial standards, Red is reserved for Emergency Stop or "Off" functions. * **K (Key/Lock):** This usually indicates a **Key-Release** or **Key-Reset** mechanism. Instead of simply pulling or twisting the button to reset the circuit, a physical key must be inserted and turned. This adds a layer of safety, ensuring only authorized personnel can restart the machine after an emergency stop. --- ### 3. Internal Electronic Components Inside the housing, the unit consists of several modular parts: #### A. Contact Block The "electronic" heart of the switch. It usually features silver-alloy contacts to prevent oxidation. * **NC (Normally Closed):** Used for safety circuits (opening the circuit stops the machine). * **NO (Normally Open):** Used for signaling or secondary logic. #### B. Terminal Screws Heavy-duty M3.5 or M4 screws designed for ring terminals or bare wire. They are often "finger-safe" to prevent accidental shocks during maintenance. #### C. Actuator Mechanism A spring-loaded mechanical linkage that converts the physical press into electrical contact separation. In the "K" version, this includes a tumbler cylinder for the key. --- ### 4. Circuit Diagram Example In a standard safety integration, the wiring typically follows this logic: ```mermaid graph LR Power[24V DC / 110V AC] --> Switch_NC[M2TS NC Contact] Switch_NC --> Relay[Safety Relay / Contactor] Relay --> Motor[Industrial Machine] ``` ---