The **M2AS1-A243-R/CE** is a specialized industrial component, typically classified as an **Illuminated Selector Switch** or a **Command/Control Switch**, often associated with brands like **Tend** or similar industrial automation manufacturers. Below is a breakdown of its electronic and mechanical parts. --- ### 1. Technical Specifications This part is designed for control panels and human-machine interface (HMI) applications. | Feature | Specification | | :--- | :--- | | **Type** | 2-Position / 3-Position Selector Switch | | **Illumination** | LED Integrated | | **Voltage (LED)** | 24V AC/DC (standard for '24' suffix) | | **Mounting Diameter** | 22mm (Standard industrial size) | | **Contact Block** | 1NO (Normally Open) + 1NC (Normally Closed) or 2NO | | **Reset Method** | Maintained (R) or Spring Return | --- ### 2. Core Electronic Components #### A. The Contact Block This is the "switching" element. When the knob is turned, internal cams press against these blocks to open or close an electrical circuit. * **Contacts:** Usually made of silver alloy for high conductivity and arc resistance. * **Rating:** Typically rated for 6A at 250VAC or 10A at 120VAC. #### B. The LED Module (Illumination) The "A24" in the part number signifies the lighting component. * **Light Source:** High-brightness LED. * **Circuitry:** Includes a built-in current-limiting resistor to allow the LED to operate directly at 24V without burning out. * **Color:** Indicated by the suffix (e.g., R = Red). #### C. Terminals * **Screw Terminals:** Used to secure wiring. They often feature "finger-safe" plastic covers to prevent accidental shocks. * **Wiring:** Accepts standard 14-22 AWG industrial wire. --- ### 3. Mechanical Construction * **The Actuator:** The "knob" or "handle" part that the operator turns. * **Bezel:** Usually made of chrome-plated plastic or aluminum to provide durability and a professional finish on the panel. * **Sealing (IP Rating):** Often rated **IP65**, meaning it is dust-tight and protected against water jets, making the internal electronics safe in harsh environments. --- ### 4. Part Number Decoder (Typical) While naming conventions vary slightly by brand, here is the logic for this specific model: | Segment | Meaning | | :--- | :--- | | **M2AS1** | Series designation (22mm Selector Switch) | | **A24** | 24V AC/DC Power supply for the lamp | | **3** | Function code (often refers to 3 positions or specific contact arrangement) | | **R** | Color (Red) | | **CE** | Compliance marking (Conformité Européenne) |