The **M2SES2-AA-R2** is a specific electronic component, typically categorized as a **Selector Switch** or a **Control Unit** part, often associated with industrial automation brands like *IDEC* (specifically within their M2 series) or similar manufacturers of control devices. Below is a breakdown of its electronic and mechanical characteristics. --- ### 1. General Specifications The part is designed for panel mounting in industrial environments, prioritizing durability and electrical reliability. | Feature | Specification | | :--- | :--- | | **Component Type** | Selector Switch (Key or Knob actuated) | | **Mounting Diameter** | Usually 22mm (Standard industrial size) | | **Contact Configuration** | Typically 2-Position (Maintain or Spring Return) | | **Current Rating** | Often rated for 10A (Thermal) | | **Voltage Rating** | Up to 600V AC/DC (Insulation rating) | --- ### 2. Key Electronic Parts & Construction The unit consists of three primary electronic/mechanical sub-assemblies: #### A. The Operator (Head) * **Actuator:** The physical part the user touches (the knob or key). * **Bezel:** Usually made of plastic or chrome-plated zinc to protect the internal mechanics from dust and moisture (IP65/66 rated). #### B. The Contact Block This is the "electronic" heart of the switch. It converts the mechanical movement into an electrical signal. * **NO/NC Contacts:** Contains **Normally Open (NO)** or **Normally Closed (NC)** contact sets. * **Wiping Action:** High-quality switches use a "wiping" motion on the contacts to clear oxidation, ensuring low electrical resistance over time. * **Material:** Contacts are often silver-plated or gold-flashed for high conductivity and corrosion resistance. #### C. The Mounting Adapter * Connects the operator head to the contact blocks. * It ensures that the mechanical torque from the switch is evenly distributed to prevent electrical arcing during slow transitions. --- ### 3. Electrical Functionality The "AA" in the part number often refers to the contact arrangement. In many industrial naming conventions: * **Position 1:** Circuit A is closed, Circuit B is open. * **Position 2:** Circuit B is closed, Circuit A is open. This allows the part to be used in **logic switching**, such as toggling between "Manual" and "Auto" modes in a control panel. --- ### 4. Technical Drawing Reference While the physical internal wiring is simple, the terminal connections follow this logic: ```yaml Terminal_1 (Common) ---- [Switch Logic] ---- Terminal_2 (Output A) \---- Terminal_3 (Output B) ``` ---