The **W2AC-AC3A-R2/N** (often stylized with a slash as W2AC-AC3A-R2/N) is a specific electronic component belonging to the **limit switch** or **position switch** category, typically manufactured by companies like **Azbil (formerly Yamatake)** or similar industrial automation providers. Below is the technical breakdown of its electronic and mechanical parts. --- ### 1. General Specifications This device is designed for heavy-duty industrial sensing, used to detect the presence, position, or end-of-travel of mechanical parts. | Feature | Specification | | :--- | :--- | | **Component Type** | Two-circuit Limit Switch | | **Contact Configuration** | 1NO / 1NC (1 Normally Open / 1 Normally Closed) | | **Housing Material** | Die-cast Aluminum (Rugged/Industrial) | | **Actuator Type** | Roller Lever (Adjustable) | | **Environmental Rating** | IP67 (Dust-tight and Water immersion) | --- ### 2. Internal Electronic Parts & Mechanism The "electronics" of this device are primarily electromechanical. Here are the core components: #### A. The Switch Block (Contact Block) The heart of the unit is a precision snap-action switch. * **Contacts:** Usually made of silver alloy to ensure high conductivity and resistance to arcing. * **Mechanism:** Uses a "Double Break" system, which allows the switch to handle higher inductive loads and improves heat dissipation during switching. #### B. Actuator Assembly * **Roller:** A rotating wheel (usually stainless steel or hardened plastic) that reduces friction when engaging with a moving cam or machine part. * **Return Spring:** A high-tension internal spring that ensures the contacts return to their original state (NC/NO) as soon as the external force is removed. #### C. Wiring Interface * **Terminals:** M3 or M3.5 screw terminals located inside the housing. * **Conduit Entry:** A threaded hole (usually G1/2 or PG13.5) for attaching armored cable or liquid-tight conduits to protect the wiring from oil and coolant. --- ### 3. Part Number Breakdown (Nomenclature) The suffix codes indicate specific electronic and physical variations: * **W2AC:** Series designation (High-precision/Compact limit switch). * **AC3A:** Defines the actuator type (Roller lever) and the specific mounting pattern. * **R2:** Often indicates a specific rotation angle or reinforced spring tension. * **/N:** Typically denotes a revision code or compliance with specific environmental standards (e.g., specific chemical resistance or updated sealing materials). --- ### 4. Electrical Ratings In industrial settings, the electronic capacity is typically rated as follows: | Load Type | Voltage | Current (Amps) | | :--- | :--- | :--- | | **AC (Resistive)** | 125V / 250V | 10A | | **DC (Resistive)** | 125V | 0.4A | | **Inductive Load** | 250V | 5A | --- ### 5. Application Usage Because of its robust construction, these parts are found in: 1. **CNC Machining Centers:** Detecting tool changer positions. 2. **Conveyor Systems:** Counting items or detecting jams. 3. **Elevators/Lifts:** Ensuring doors are closed or floors are reached. ---