The **ABFW201-R** is a specific model of industrial control switch manufactured by **IDEC**. It belongs to the **TW series** of 22mm heavy-duty switches. Below is a detailed breakdown of its electronic and mechanical parts. --- ### 1. Technical Specifications The ABFW201-R is a push-lock, turn-reset switch. Its part number identifies specific electronic and physical characteristics: | Feature | Specification | | :--- | :--- | | **Series** | TW Series (Industrial Grade) | | **Mounting Hole** | 22mm | | **Operator Style** | Mushroom Head (Oversized/Extended) | | **Function** | Push-Lock, Turn-Reset (Maintained) | | **Contact Configuration** | 1NC (Normally Closed) | | **Color** | Red (R) | | **Illumination** | Non-Illuminated | --- ### 2. Internal Electronic & Mechanical Components The device consists of three primary modules that work together: #### A. The Operator (Mushroom Head) This is the red plastic interface. In the **ABFW201-R**, this is a "Maintained" mechanism. When pushed, it physically locks into the "down" position. To release the electrical circuit back to its original state, the operator must be rotated clockwise. #### B. The Contact Block (HW-CB01) The electronic "heart" of the switch. * **NC Contact:** The "01" in the part number signifies one Normally Closed contact. * **Action:** When the button is pushed, the internal bridge moves, breaking the electrical connection. * **Rating:** Usually rated for **10A** thermal current, supporting AC voltages up to 600V and DC up to 250V. #### C. The Locking Ring and Gasket * **NEMA/IP Rating:** Includes a rubber gasket that ensures an **IP65** (waterproof/dustproof) seal when mounted to a panel. * **Metallic Nut:** A chrome-plated octagonal nut that secures the unit to the 22mm cutout. --- ### 3. Typical Wiring Application Since this unit features a **1NC** contact, it is almost exclusively used as a **Stop Switch** or an **Emergency Stop**. ```mermaid graph LR Power_In -->|Terminal 1| Contact_Block(NC Bridge) Contact_Block -->|Terminal 2| Motor_Contactor ``` * **Logic:** Under normal conditions, electricity flows through the NC contact to keep a machine running. * **Interruption:** Pushing the red mushroom head breaks the circuit instantly, stopping the machine. --- ### 4. Summary of Materials * **Contacts:** Silver-plated contacts for high conductivity and oxidation resistance. * **Housing:** High-impact polycarbonate and chrome-plated zinc die-cast for the locking ring. * **Terminals:** M3.5 screw terminals with "SS" (Self-lifting) washers for easy wire insertion.