The **SVB-ZE-R/K** is a specific electronic component primarily associated with **Schlegel**, a manufacturer known for high-quality industrial control units, switches, and emergency stop buttons. This specific model refers to a **Contact Block** designed for mounting on control panels. --- ### 1. Technical Specifications The SVB-ZE-R/K is characterized by its safety-oriented design and modular connectivity. | Feature | Specification | | :--- | :--- | | **Component Type** | Contact Block (Emergency Stop / Safety) | | **Contact Configuration** | 2 NC (Normally Closed) + 1 NO (Normally Open) | | **Connection Type** | Spring-cage terminals (Screwless) | | **Switching Voltage** | Up to 250V AC/DC | | **Thermal Current** | 10A | | **Operating Temperature** | -30°C to +70°C | | **Approval Standards** | CE, UL, VDE | --- ### 2. Key Electronic Features * **Positive Opening Operation:** The NC (Normally Closed) contacts are designed to be "positively driven," meaning they are forced open by the mechanical movement of the actuator, ensuring a fail-safe break in the circuit even if contacts weld. * **Spring-Cage Terminals:** The `/K` suffix usually denotes the terminal style. Spring-cage terminals offer high vibration resistance and reduce maintenance, as they do not loosen over time like traditional screw terminals. * **Safety Category:** Often used in SIL (Safety Integrity Level) rated circuits for E-Stop (Emergency Stop) applications. * **Modular Design:** It is designed to snap onto the back of an actuator (the button or switch part) using a mounting flange. --- ### 3. Connection Diagram Logic The internal circuitry follows a standard industrial logic for safety monitoring: ```text Input (L1) ----[ NC 1 ]---- Output (To Safety Relay) Input (L1) ----[ NC 2 ]---- Output (To Safety Relay) Input (24V) ---[ NO 1 ]---- Output (To PLC Status Input) ``` * **NC Contacts:** Used for the safety loop (Dual channel for redundancy). * **NO Contact:** Typically used for signaling to a PLC that the button has been pressed. --- ### 4. Application Areas The SVB-ZE-R/K is commonly found in: * **Industrial Automation:** Machine control panels. * **Emergency Stop Units:** Specifically paired with red mushroom-head buttons. * **Safety Gates:** Integrated into interlocking systems to cut power when a gate is opened.