Product Description
The Siemens 6AV3520-1EL00 is a robust and reliable operator panel designed for industrial automation applications. This HMI unit provides a clear and efficient interface for machine and process control, featuring a monochrome LCD display for optimal visibility in diverse lighting conditions. The panel incorporates a durable keypad with tactile feedback, ensuring accurate and dependable data entry even in demanding environments. Its compact design allows for flexible installation in control cabinets or directly on machinery. The 6AV3520-1EL00 supports a range of communication protocols, facilitating seamless integration with Siemens PLCs and other automation devices. Programming is accomplished through user-friendly software, enabling the creation of customized operator interfaces tailored to specific application requirements. This operator panel is engineered for long-term performance and is a dependable solution for enhancing operational efficiency and control in industrial settings.
Is Your Device Showing These Signs?
The Siemens 6AV3520-1EL00, commonly found in Simatic OP27 HMI panels, exhibits failures such as a dead backlight due to inverter board malfunction, touchscreen unresponsiveness requiring calibration or replacement, communication errors stemming from corrupted firmware or faulty serial/Profibus ports, and power supply failures affecting the entire unit's operation. Memory corruption leads to program loss, necessitating reprogramming. Resolving these issues involves component-level repairs on the power supply and inverter, firmware reflashing, touchscreen replacement, and thorough testing of communication interfaces to restore the HMI to its operational state.
Technical specifications
The Siemens 6AV3520-1EL00 is a robust and reliable operator panel designed for industrial automation applications, featuring a monochrome LCD display for clear visualization of process data and machine parameters. This HMI unit provides a user-friendly interface for operators to monitor and control equipment, enabling efficient operation and troubleshooting. Equipped with a membrane keypad, the 6AV3520-1EL00 offers tactile feedback for accurate input, even in demanding industrial environments. Communication interfaces, including serial ports, facilitate seamless integration with Siemens PLCs and other automation devices, ensuring real-time data exchange and control. The panel supports configurable function keys, allowing customization for specific application requirements and streamlining operator tasks. Its compact design and durable construction make it suitable for installation in control cabinets or directly on machinery, providing a long-lasting and dependable solution for industrial human-machine interface needs. The 6AV3520-1EL00 is programmed using Siemens ProTool software, enabling the creation of customized screens and functionalities to meet specific application demands, thereby optimizing operational efficiency and minimizing downtime.
Our Repair Process for the
6AV3520-1EL00
Our repair process for the Siemens 6AV3520-1EL00 Simatic OP27 HMI panel begins with a comprehensive diagnostic assessment to pinpoint the failure. Backlight issues are resolved through component-level repair of the inverter board. Touchscreen unresponsiveness is corrected via recalibration or complete replacement. Communication errors are addressed by reflashing the firmware or repairing faulty serial/Profibus ports. Power supply failures necessitate component-level repairs to restore proper voltage regulation. Memory corruption resulting in program loss requires complete reprogramming. Each repaired unit undergoes rigorous testing of all functions and communication interfaces to ensure full operational status before it is returned.
Your Guarantee: Warranty & Lifetime Support
Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.
Comprehensive Repairs You Can Depend On
We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.
Save Significantly
Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.

Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.

















