The **AOFW301-R** is a specific model of an industrial control component manufactured by **IDEC**. It belongs to the **TW series** of 22mm pushbuttons. Below is a detailed breakdown of its electronic and mechanical parts. ### 1. Component Identification Table | Feature | Specification | | :--- | :--- | | **Manufacturer** | IDEC | | **Series** | TW Series (Traditional Heavy Duty) | | **Part Number** | AOFW301-R | | **Mounting Hole** | 22mm | | **Button Type** | Extended Pushbutton | | **Action** | Momentary (Spring Return) | | **Contact Configuration** | 1NC (Normally Closed) | | **Color** | Red (R) | --- ### 2. Breakdown of Electronic & Mechanical Parts The AOFW301-R is modular and consists of several key sub-assemblies: #### A. The Operator (Head) * **Bezel:** Chrome-plated zinc locking ring that secures the button to the panel. * **Button Face:** A red, extended (protruding) plastic cap. "Extended" means it sits higher than the bezel, making it easier to press but more susceptible to accidental activation compared to "Flush" buttons. * **Return Spring:** A high-tension internal spring that ensures the button returns to its original position immediately after being released. #### B. The Contact Block (The Electronic Logic) * **Model:** Usually the **BST-01** (or equivalent 1NC block). * **Terminals:** M3.5 screw terminals with captive wire clamps (Self-lifting). * **Contact Material:** Silver contacts (Ag), which provide high conductivity and resistance to oxidation. * **Circuitry:** It uses a **1NC (Normally Closed)** contact. In its resting state, the circuit is closed (conducting). When the button is pressed, the bridge breaks, and the circuit opens. #### C. Mounting & Housing * **Gasket:** A rubber seal located behind the bezel to provide an **IP65** (water/oil tight) rating. * **Locking Nut:** A plastic or metal nut that threads onto the back of the operator to clamp the device to the control panel. --- ### 3. Electrical Ratings | Parameter | Value | | :--- | :--- | | **Rated Insulation Voltage (Ui)** | 600V | | **Thermal Current (Ith)** | 10A | | **Operating Voltage (AC)** | Up to 600V | | **Operating Voltage (DC)** | Up to 250V | | **Contact Resistance** | 50 mΩ maximum (initial) | --- ### 4. Wiring Diagram (Logic) In a typical industrial application, the AOFW301-R is used as a **Stop Button** because of its red color and Normally Closed (NC) logic. ```text [Power L1] ----(11) [ AOFW301-R ] (12)---- [ Load / PLC Input ] ``` * **Resting:** Current flows from 11 to 12. * **Pressed:** Path is broken; current stops.