The **ALV-C22-R** is a specific electronic component typically categorized as an **industrial indicator pilot light** or an **emergency stop auxiliary part**, often associated with manufacturers like IDEC. Below is a detailed breakdown of its electronic and mechanical parts. --- ### 1. Technical Specifications The "C22" in the part number usually refers to the 22mm mounting diameter, which is the global standard for industrial control panels. | Feature | Specification | | :--- | :--- | | **Mounting Diameter** | 22mm | | **Component Type** | LED Illuminated Unit / Pilot Light | | **Color Code** | R (Red) | | **Input Voltage** | Typically 24V AC/DC (Standard for ALV series) | | **Series** | LW or TW Series (depending on specific regional catalog) | | **Environmental Rating** | IP65 (Waterproof/Dustproof from front) | --- ### 2. Internal Electronic Components The ALV-C22-R is composed of several critical layers that allow it to function within an automated circuit: #### A. The Light Engine (LED Module) Unlike old incandescent bulbs, the "R" variant uses a high-intensity **Red LED**. * **Current Limiting Resistor:** Internal circuitry prevents the LED from burning out by regulating the 24V input. * **Reverse Polarity Protection:** A diode is often included to protect the light if DC wires are swapped. #### B. Contact Block Interface The electronic signals are managed by the contact blocks attached to the back: * **Terminals:** Usually screw-type (M3.5) for securing 14-22 AWG wiring. * **Voltage Transformer (Optional):** Some variants include a step-down transformer if the main panel runs on 120V or 240V. #### C. The Optical Lens * **Material:** Polycarbonate. * **Design:** Grooved internal surface to diffuse LED light evenly, preventing "hot spots" and ensuring visibility from wide angles. --- ### 3. Wiring Configuration The part typically operates on a simple two-terminal circuit. ```mermaid graph LR A[Power Source +24V] --> B(Terminal X1) B --> C{Internal LED} C --> D(Terminal X2) D --> E[Common/Ground] ``` --- ### 4. Typical Applications * **Status Indication:** Used to show that a machine is in a "Fault" or "Stop" state. * **Control Panels:** Fits into standard CNC or PLC interface panels. * **Emergency Signaling:** Often paired with a mushroom head or used as a standalone warning light.