The **W2AC-A2DY-R2** is a specific part number belonging to a series of **Rotary Switches** or **Selector Switches**, typically manufactured by industrial component suppliers (often associated with the IDEC or similar industrial automation brands). Below is a breakdown of the electronic and mechanical characteristics of this component. --- ### 1. General Specifications This part is an industrial-grade control component designed for panel mounting. It is used to open or close electrical circuits manually. | Feature | Description | | :--- | :--- | | **Component Type** | Rotary Selector Switch | | **Bezel Shape** | Round | | **Operator Type** | Knob / Lever | | **Positions** | 2-Position (typically Maintain/Stay put) | | **Contact Block** | Removable / Modular | --- ### 2. Part Number Breakdown (Functional Logic) In industrial nomenclature, the codes usually represent specific attributes: * **W2**: Refers to the series size (often 22mm mounting hole diameter). * **AC**: Indicates the operator action (e.g., 2-position, 90-degree throw). * **A2**: Denotes the contact configuration (e.g., 2NO - Two Normally Open contacts). * **DY**: Specifies the color or handle type (D: Knob, Y: Yellow or specific illumination type). * **R2**: Often refers to a revision code or specific terminal style (e.g., finger-safe terminals). --- ### 3. Key Electronic Components #### A. Contact Blocks The "A2" designation usually implies that there are **two contact blocks** attached to the back of the switch. * **Normally Open (NO):** The circuit is open until the knob is turned. * **Current Rating:** Typically rated for **10A** thermal current, with operational voltages up to **600V AC/DC**. #### B. Illumination (If Applicable) If the model is an illuminated version, it contains: * **LED Module:** A low-power light source integrated into the center. * **Resistor/Transformer:** Internal circuitry to drop the line voltage (e.g., 120V or 240V) to the LED operating voltage. #### C. Terminals * **Screw Terminals:** Used for heavy-duty industrial wiring. * **IP Rating:** Usually **IP65**, meaning the front of the part is protected against dust and water jets, while the electronic contacts are protected within the enclosure. --- ### 4. Common Applications 1. **Industrial Control Panels:** Used to toggle between "Auto" and "Manual" modes. 2. **Emergency Systems:** Selecting power sources. 3. **Motor Control:** Initiating start/stop sequences via a PLC (Programmable Logic Controller).