The **M2AMS-A11-R** is an industrial-grade rotary selector switch, commonly part of the **M2A** series of control components. These parts are typically used in automation control panels, power distribution units, and machinery interfaces. --- ### 1. Key Technical Specifications | Parameter | Specification | |:---|:---| | **Type** | Rotary Selector Switch | | **Mounting Diameter** | 22mm (Standard Industrial Size) | | **Operator Type** | 2-Position (typically 90° throw) | | **Contact Configuration** | 1NO (Normally Open) or 1NC (Normally Closed) base | | **Reset Method** | Maintained (Stays in position) | | **Illumination** | Non-Illuminated (Standard) | | **Ingress Protection** | IP65 / NEMA 4X (Dust-proof and water-jet resistant) | --- ### 2. Breakdown of the Model Code While specific manufacturer prefixes can vary slightly (often associated with brands like **IDEC** or **Altech**), the nomenclature generally follows this logic: * **M2A:** The series designation (22mm metal or plastic bezel series). * **MS:** "Maintained Selector" – the switch stays in the position it is turned to. * **A11:** This usually refers to the contact block arrangement (e.g., 1 Normally Open and 1 Normally Closed contact). * **R:** Color indicator (Red) or a specific revision code depending on the regional distributor. --- ### 3. Electronic & Mechanical Components #### A. The Operator (Head) The physical knob located on the front of the panel. It is designed with high mechanical durability to withstand thousands of rotations. It includes a gasket to ensure the IP65 seal against the panel face. #### B. The Contact Block This is the "electronic" heart of the switch. When the knob is turned, a mechanical cam pushes a plunger on the contact block: * **Terminals:** Usually screw-type terminals for securing 14-22 AWG wiring. * **Switching Capacity:** Typically rated for **10A at 600V AC** (General Purpose) or specific DC ratings (e.g., 2.2A at 125V DC). #### C. Locking Lever A quick-release mechanism that allows the operator head to be separated from the contact blocks. This makes installation easier as the head can be mounted through the hole first, and the electronics clipped on from the back. --- ### 4. Common Applications * **Manual/Auto Selection:** Switching a machine between manual control and automated PLC control. * **Power On/Off:** Basic circuit isolation for low-voltage control signals. * **Directional Control:** Selecting motor rotation direction (Forward/Reverse).