The **SVB-K8W-R/CE** is a specialized electronic control component, typically identified as an **Illuminated Emergency Stop (E-Stop) Switch** or a specific **Control Station Unit** used in industrial automation and safety systems. Below is a detailed breakdown of its electronic and mechanical parts. ### 1. Component Specifications | Feature | Description | | :--- | :--- | | **Type** | Emergency Stop Push Button / Control Unit | | **Mounting** | 22mm standard panel cutout | | **Illumination** | Integrated LED (Red/White options) | | **Contact Blocks** | Often configured with 1NC (Normally Closed) or 2NC safety contacts | | **Termination** | Screw terminals or plug-in connectors (model dependent) | | **Ingress Protection** | IP65 or IP66 (Dust-tight and water-resistant) | | **Certification** | CE marked (Complies with European safety standards) | --- ### 2. Key Electronic & Physical Parts #### A. The Actuator (Mushroom Head) The "R" in the suffix usually denotes a **Red** mushroom head. This is the physical interface designed for "Trigger Action" or "Twist-to-Release" operation. It ensures that once pressed, the circuit remains open until manually reset. #### B. Contact Block Assembly This is the core electronic part located behind the panel. * **Safety Contacts (NC):** These are designed to break the circuit immediately when the button is pressed. * **Positive Opening Operation:** The contacts are mechanically forced open, ensuring the circuit breaks even if the contacts try to weld together under high current. #### C. LED Illumination Circuit The "W" in the code often refers to a **White** or **Windowed** illumination feature. * **Voltage Range:** Typically operates on 24V AC/DC, though some versions support 110V-230V. * **Internal Resistor:** Built-in to protect the LED from voltage spikes. #### D. The Enclosure (K8 Housing) If the part includes the "K8" designation, it often refers to a compact surface-mount plastic box. * **Material:** High-impact polycarbonate or ABS. * **Entries:** Pre-threaded holes for M20 or PG13.5 cable glands to maintain the IP rating. --- ### 3. Connection Schematic (Typical) ```text [ Power Source ] ---- [ (11) NC Contact (12) ] ---- [ Machine Contactor/PLC Input ] | [ 24V DC (+) ] ---- [ (X1) LED Terminal ] [ 0V DC (-) ] ---- [ (X2) LED Terminal ] ``` --- ### 4. Safety Standards The **/CE** suffix indicates the part is tested under: * **EN ISO 13850:** Safety of machinery – Emergency stop function. * **IEC 60947-5-1:** Low-voltage switchgear and controlgear.