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A Human-Machine Interface (HMI), also known as a Human-Machine Interface (HMI), is an industrial touchscreen that enables communication between an operator and an automated machine. Schneider Electric HMIs cover all industrial human-machine interface needs, from simple machines to the most demanding environments. The basic Harmony STO, ST6, and STU ranges offer compact, cost-effective, and easy-to-install HMI solutions, while the Harmony ST6 stands out as an IIoT-connected HMI, ideal for modernizing industrial equipment and improving productivity.
For more complex applications, the advanced Harmony GTO, GTU, DT and GTUX HMIs offer performance, modularity, and robustness, perfectly suited to automated lines and extreme environments. Integrated into the EcoStruxure ecosystem, these Schneider Electric industrial HMIs enable advanced connectivity, real-time data access, and improved operational performance.
This guide will help you select the most appropriate interface and compare the main ranges available: ST6, STO, STU, DT, GTO, GTU and GTUX.
An HMI (Human Machine Interface), also called HMI (Human-Machine Interface), is an industrial touchscreen that enables communication between an operator and an automated machine.
Industrial HMIs are used to:
Modern HMIs have become essential components of Industry 4.0 systems, thanks to their ability to communicate with industrial networks, the Cloud, SCADA software and IIoT platforms.
Schneider Electric's Basic Harmony HMIs are designed for simple to medium-sized machines that require a high-performance, reliable, and cost-effective operator interface. The range includes the ST6, STW6, STU, STM6, and STO7 series, offering high-resolution touchscreens with up to 16 million colors, advanced Ethernet connectivity, and native integration with the EcoStruxure™ ecosystem. With modern features such as the OPC UA server, remote viewing via web browser, multi-window displays, and integrated cybersecurity, these HMIs improve operational efficiency while preparing equipment for Industry 4.0 requirements.
Applications: Packaging, HVAC, pumping, food and beverage, water treatment, marine, control panels.
Schneider Electric's advanced Harmony HMIs are designed for high-performance machines and demanding industrial applications requiring superior processing power, extensive connectivity, and robustness. The range includes the GTO, GTU, GTUX, and DT series, offering high-resolution displays up to 19 inches, modular architectures, multiple communication options (Ethernet, serial, industrial buses), and seamless integration with EcoStruxure™ platforms. Designed for critical environments such as food and beverage, automotive, water treatment, marine infrastructure, oil and gas, and outdoor applications, these HMIs are distinguished by their high performance, enhanced cybersecurity, and ability to handle complex applications. The GTUX models, specifically designed for extreme environments, offer increased resistance to UV radiation, temperatures from -30°C to +70°C, and IP66F/IP67F protection, ensuring maximum reliability in the harshest conditions.
Applications : Production lines, Robotics, Industrial processes, Critical infrastructure, Complex OEM machines, Harsh environments (vibrations, extreme temperatures)
| Products line | Type | Screen size | Software | Highlights | Ideal applications | Level |
|---|---|---|---|---|---|---|
Products line | Type Compact | Screen size 4.3” | Software EcoStruxure Operator Terminal Expert | Highlights Compact, economical, easy to integrate | Ideal applications Small machinery, HVAC, pumping | Level Entry-level |
Products line | Type Basic HMI | Screen size 4" to 15" | Software EcoStruxure Operator Terminal Expert | Highlights High resolution, 16M colors, Dual Ethernet, cybersecurity | Ideal applications Packaging, food processing, pumping, marine | Level Basic Advanced |
Products line | Type HMI de base WEB | Screen size 4" to 15" | Software Integrated HTML5 browser | Highlights HTML5 web visualization, remote access | Ideal applications Maintenance, secondary supervision | Level Web HMI |
Products line | Type Modular Basic HMI | Screen size 4” and 7” | Software EcoStruxure Operator Terminal Expert | Highlights 22 mm tool-free mounting, modularity, quick maintenance | Ideal applications Compact machines, OEM, industrial panels | Level Modular Basic |
Products line | Type Advanced HMI | Screen size 3.5” to 12” | Software Vijeo Designer | Highlights High temperature, stainless steel available, international certifications | Ideal applications High-performance machinery, food processing | Level Advance |
Products line | Type HMI without cutting | Screen size 3.5” and 5.7” | Software Vijeo Designer | Highlights Quick installation without cutting | Ideal applications Compact machines, retrofit | Level Advanced compact |
Products line SCU | Type HMI + controller | Screen size 3.5” and 5.7” | Software EcoStruxure Machine Expert | Highlights HMI with integrated PLC | Ideal applications Small automations | Level Integrated controller |
Products line | Type High-performance modular HMI | Screen size 7” à 19” | Software Vijeo Designer / EcoStruxure Operator Terminal Expert | Highlights Modular architecture, multitouch, high performance | Ideal applications Production lines, complex machines | Level Premium |
Products line | Type Extreme HMI | Screen size 7" to 15" | Software Vijeo Designer / EcoStruxure Operator Terminal Expert | Highlights UV, extreme temperatures, IP66/IP67 | Ideal applications Oil and gas, water, outdoors, harsh environment | Level Extreme |
Schneider Electric Harmony HMIs represent a complete solution for companies looking to modernize their industrial automation systems. With their advanced connectivity, integrated cybersecurity, and IIoT compatibility, Harmony HMIs perfectly meet the needs of modern smart factories.
Whether it is a Basic ST6 HMI, a modular STM6 HMI, an advanced GTO HMI, a GTUX for extreme environments or a Harmony P6 industrial PC, Schneider Electric offers a reliable, scalable and high-performance platform for all industrial applications.
An HMI Human Machine Interface) is an industrial touchscreen that allows operators to monitor, control, and configure automated machines and processes. It displays real-time data, alarms, diagnostics, and production information while providing an intuitive interface to communicate with programmable logic controllers (PLCs).
A PLC (Programmable Logic Controller) controls the machine by executing the automation program. An HMI provides the user interface that allows operators to visualize information, adjust settings, acknowledge alarms, and interact with the PLC without modifying the control program.
The right HMI depends on your application:
Harmony STO7 – Cost-effective solution for small machines and basic applications.
Harmony ST6 – Ideal for most industrial machines requiring a modern touchscreen interface.
Harmony STW6 – Designed for web visualization and remote access through an HTML5 browser.
Harmony STM6 – Compact modular HMI with quick installation for space-constrained panels.
Harmony STU – Ultra-compact HMI designed for installation without panel cutouts.
Harmony GTO – High-performance HMI for demanding industrial applications.
Harmony GTU – Modular premium HMI for complex machines and advanced automation systems.
Harmony GTUX – Rugged HMI built for outdoor and extreme industrial environments.
The Harmony ST6 is a full-featured industrial HMI designed for standard machine applications with advanced connectivity.
The Harmony STW6 includes similar core features while adding an integrated HTML5 Web HMI that enables remote visualization and browser-based access.
The Harmony GTO is designed for high-performance industrial machines that require a reliable and robust operator interface.
The Harmony GTU offers a modular architecture with greater processing power, flexibility, and expansion capabilities, making it ideal for complex and scalable automation systems.
Industrial HMIs are commonly used to:
Yes. Harmony HMIs are fully compatible with Schneider Electric PLCs and support multiple industrial communication protocols depending on the model, including Modbus, EtherNet/IP, PROFINET, Ethernet, Serial communications, and OPC UA.
Yes. Modern Harmony HMI families include Industry 4.0 features such as Ethernet connectivity, OPC UA, web services, remote access, industrial data collection, and seamless integration with Schneider Electric's EcoStruxure™ platform.
The recommended screen size depends on your application:
3.5" to 5" – Compact machines and simple applications
7" – The most common size for industrial automation
10" to 12" – Production lines and process control
15" to 19" – Large machines, SCADA visualization, and complex industrial systems
Yes. Harmony GTUX HMIs are specifically engineered for demanding environments, including outdoor installations, water and wastewater facilities, oil and gas, marine applications, and locations exposed to UV radiation, vibration, humidity, dust, and extreme temperatures.
The programming software depends on the HMI family:
Always verify the software compatibility for your specific HMI model.
Tradelco offers a complete selection of Schneider Electric Harmony HMIs along with expert technical support to help you choose the right operator interface for your application. Our automation specialists can also assist with PLC compatibility, accessories, and EcoStruxure™ solutions.
