At PLC Hardware, we not only offer access to top-tier HMI solutions from leading manufacturers, but we also provide some of the most competitive pricing in the industrial automation market. Our major lines, including Rockwell, Siemens, and Schneider, often see price reductions of up to 50% or more, even before factoring in the benefits of project pricing.
Choose a screen size that balances visibility and space constraints.
Decide between touchscreen or keypad based on operator needs and environment.
Ensure sunlight readability for outdoor or brightly lit areas.
Environmental Conditions
Check the IP rating for protection against dust, moisture, and water (e.g., IP65, IP67).
Verify the operating temperature range (e.g., -20°C to 60°C for industrial use).
Ensure vibration and shock resistance for harsh environments like mining or transport.
Communication and Connectivity
Confirm support for required communication protocols (e.g., Modbus, Profibus, Ethernet/IP).
Ensure compatibility with existing PLCs and SCADA systems.
Choose an HMI with remote access options (Ethernet, Wi-Fi, or cloud connectivity) if needed.
Performance and Processing Power
Select a processor and memory capacity suitable for complex or high-speed applications.
Ensure adequate storage for data logging or support for external storage.
Prioritise fast response times for real-time monitoring and control.
Usability and Maintenance
Choose an HMI with an intuitive interface and user-friendly programming software.
Ensure customisation options for screens, alarms, and user access levels.
HMI Installation Best Practices
Proper Mounting and Positioning
Sturdy Mounting: Ensure the HMI is securely mounted on a stable surface or panel to prevent vibrations or movement.
Ergonomic Placement: Position the HMI at an appropriate height and angle for easy operator access and visibility.
Environmental Protection: Install the HMI in a location protected from excessive dust, moisture, heat, and direct sunlight.
Correct Electrical Connections
Power Supply: Use the correct voltage and current as specified by the manufacturer, and install a surge protector or UPS for added safety.
Grounding: Properly ground the HMI to prevent electrical interference and ensure operator safety.
Cable Management: Route communication and power cables neatly, avoiding high-voltage lines to reduce interference. Use shielded cables for better signal integrity.
Environmental Considerations
Temperature and Humidity: Ensure the installation environment is within the HMI’s operating temperature and humidity range.
IP Rating Compliance: For harsh environments, choose an HMI with an appropriate IP rating (e.g., IP65 for dust and water resistance).
Vibration and Shock: In high-vibration areas, use anti-vibration mounts or select an HMI designed for rugged conditions.
Testing and Configuration
Pre-Installation Testing: Test the HMI and its connections before final installation to ensure proper functionality.
Software Configuration: Upload and test the HMI program (e.g., screens, alarms, controls) to verify all features work as intended.
Operator Training: Train operators on how to use the HMI effectively, including navigating screens and responding to alarms.
An HMI (Human-Machine Interface) is a user interface or dashboard that connects a person to a machine, system, or device. It’s commonly used in industrial settings to control and monitor equipment.
What are the main functions of an HMI?
The main functions include:
Displaying real-time data and system status.
Allowing operators to control machinery or processes.
Providing alerts and notifications for faults or issues.
Logging data for analysis and reporting.
What’s the difference between an HMI and a SCADA system?
An HMI is typically a localised interface for interacting with a machine or process, while SCADA (Supervisory Control and Data Acquisition) is a broader system that collects data from multiple sources and often includes HMIs as part of its setup.
What communication protocols do HMIs support?
HMIs often support protocols like Modbus, Profibus, Ethernet/IP, and OPC UA to communicate with PLCs (Programmable Logic Controllers) and other devices.
