The **M2REB-R22-M2/N** refers to a specific configuration within the **M2 series** of industrial emergency stop (E-Stop) pushbuttons, typically manufactured by companies like **IDEC** or similar industrial control providers. --- ## 1. Component Overview This device is an electromechanical switch designed for safety applications. It allows an operator to manually interrupt a circuit to stop machinery in the event of an emergency. ### Technical Specifications Table | Feature | Specification | | :--- | :--- | | **Series** | M2 Series (Emergency Stop) | | **Mounting Hole** | 22mm (Standard Industrial) | | **Contact Configuration** | 2NC (Normally Closed) | | **Operation Type** | Push-lock, Turn-reset (or Pull-reset) | | **Illumination** | Non-Illuminated (denoted by the /N suffix) | | **Operator Shape** | Mushroom Head (40mm standard) | | **Degree of Protection** | IP65 (Dust-tight and water jet resistant) | --- ## 2. Key Electronic & Mechanical Parts ### A. Contact Block (2NC) The "R22" in the part number usually signifies the contact arrangement. * **NC (Normally Closed):** These contacts remain closed during normal operation, allowing current to flow to the machine's control circuit. * **Safety Function:** When the button is pressed, the contacts are forced open, breaking the circuit and triggering a "Stop" command. * **Direct Opening Action:** Ensures that the contacts will open even if they are slightly welded together (a critical safety requirement). ### B. The Actuator (Mushroom Head) The red button is designed for high visibility and ease of use. * **Push-Lock:** Once pressed, the button mechanically locks in the "Down" position to prevent the machine from restarting accidentally. * **Reset Mechanism:** To restore the circuit, the operator must rotate the head (Turn-reset) to pop the button back up. ### C. Mounting Base The unit uses a 22mm threaded body that fits into standard industrial control panels. It typically includes a locking ring and a rubber gasket to maintain an **IP65** rating, preventing moisture or dust from entering the electrical enclosure. --- ## 3. Circuit Application In a standard safety circuit, the **M2REB-R22-M2/N** is wired in series with the power coil of a safety relay or contactor. ```mermaid graph LR Power[Power Source] --> EStop[M2REB E-Stop NC] EStop --> Relay[Safety Relay] Relay --> Motor[Industrial Machine] ``` *If the E-stop is pressed, the path to the Safety Relay is broken, and the Motor stops immediately.* ---