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Human-Machine Interface

Your Professional Human-Machine Interface Supplier！

Leonhard (Shanghai) Electricity Co., Ltd. (LEONHARD) established in 2017, is a high-tech enterprise in the field of power quality, specializing in modern, professional, and intelligent high-quality products and services.As a pioneer and leader in power quality solutions, LEONHARD specializes in R&D, production, and sale of Active Harmonic Filter, Static Var Generator, Hybrid Var Compensator System,Dynamic Voltage Restorer,VFD DC Link System,Unified Power Quality Conditioner.

why choose us

Professional Team

Leonhard is the first company in China to apply SiC MOSFET to the power quality industry. It has advanced manufacturing equipment and a professional R&D team. Through continuous improvement and R&D, its SiC series products have now reached the third generation.

Our Certifications

Our products are backed by CE certification, patents, and third-party testing reports. With successful projects across multiple international markets, we understand global standards and application requirements.

Sales Market

Our power quality products have been widely used in Poland, Mexico, Belarus, Cambodia, Thailand, Vietnam, Dortmund and other countries.

Our Service

We provide end-to-end service from pre-sales system design to installation, commissioning, and after-sales support. With 24/7 technical assistance and regular maintenance services, we help ensure stable system operation over time.

Overview of Human-Machine Interface

A Human-Machine Interface (HMI) is a user interface or dashboard that connects a human operator to a machine, system, or device. It acts as a digital bridge, allowing users to visualize, monitor, and control industrial processes or equipment through screens, keyboards, or touchscreens.

Product Specification

We offers the following product specifications：

Category	Item	Specification
General	Type	LD70S
Display	LCD Screen	7" TFT
	Backlight Type	LED
	Display Colors	262K
	Resolution	800 × 480
	Display Brightness	250 cd/m²
	Touch Screen	Four-wire resistive
Electrical	Input Voltage	24 ±20% VDC
	Rated Power	5W
System	Processor	Cortex-A7 multi-core
	Memory	128MB
	Boot Time	＜10s
	Disk Space	8M
	Hardware Clock	Built-in
	Software Type	Configuration software
Interfaces	Serial Interface	Method 1: COM1 (232), COM2 (485), COM3 (485)
		Method 2: COM1 (232), COM9 (422)
	USB Interface	1 × Host/Slave
	Ethernet Port	1 × 10/100M adaptive
Environmental Conditions	Operating Temperature	0℃ ~ 45℃
	Operating Humidity	5%–90% (non-condensing)
	Storage Temperature	-10℃ ~ 60℃
	Storage Humidity	5%–90% (non-condensing)
Mechanical	Casing Material	Engineering plastics
	Casing Color	Industrial White
	External Dimensions	203 mm × 149 mm
	Rack Openings	192 mm × 138 mm
	Display Size	155 mm × 88 mm

Product advantages

Ease of use

HMI operators have heavy responsibilities and vast amounts of information to handle. They focus on simplicity; enabling operators to spot and solve problems quickly.

Drag-and-drop tools

Rapid application development

Proven templates, with no scripting required

Robust training

Ability to tailor the HMI to your workflow

View on any device

Native communication to devices using industry standard protocols

Future proof

No other HMI software matches AVEVA’s for its ability to grow with your business, whatever its size.

Constantly evolving HMI software

Keeps pace with technology to support remote connectivity, IoT architectures, and communicate with data stored in the cloud.

Scalable, to meet the needs of growing operations

Compatible with legacy systems as well as new technology

Efficiency

Our HMIs offer much more than visual information. They connect people, applications and machines across different locations.

Designed for effective collaboration

Unparalleled communication capabilities across applications and protocols such as PLC, MQTT and SCADA

Backward compatibility

View and control your machines from anywhere in the world

Components

Programmable Logic Controllers (PLCs):

PLCs enable the automation of industrial processes through precise control and monitoring. PLCs act as the brain of the operation, executing programmed instructions to manage machinery and processes.

Control Systems:

Control systems in HMIs integrate various sensors and actuators to manage and regulate the behavior of machines and processes. They use feedback loops and control algorithms to maintain desired performance levels.

Software Applications:

Software applications provide the user interface for operators to interact with and control industrial processes. They offer features such as real-time data visualization, alarm management, and diagnostics so that operators can efficiently manage and respond to system conditions in real-time.

Inputs and Outputs:

Inputs and outputs (I/O) facilitate the exchange of data between the operator and the machinery. Inputs include devices like touchscreens and keyboards, while outputs include monitors and LED displays.

Application

Manufacturing:

HMIs facilitate real-time monitoring and control of complex machinery, boosting efficiency and productivity on the factory floor.

Automotive:

In-vehicle HMIs, from infotainment systems to driver assistance displays, enhance the driving experience and ensure safety.

Healthcare:

Medical equipment relies on HMIs for precise operation and data visualisation, aiding healthcare professionals in providing accurate diagnoses and treatment.

Home Automation:

Smart home devices leverage HMIs to enable intuitive control of lighting, security systems, and other connected appliances.

Certifications

Other Services

All of our machines will be fully checked by our quality control department before the shipment. We guarantee all of our have a one-year warranty (quick-wear parts not included).

Training details: Operation principles, system, and structure, safety and maintenance, software processing technique, etc.

Numerous feedback from our clients have proven that our machines are stable in performance with rare malfunction.However, we would like to handle it as follows once malfunction occurs:

We guarantee that we will give you a clear reply within 24 hours.

Customer service staff will assist you in analyzing the malfunction to locate the cause.

If the malfunction is caused by improper operation of software and other soft faults, we will help solve the problem online.

We will offer plenty of online support, like detailed technical and installation instructions via email, video, and telephone.

Package & Delivery

1. Package: Standard export package or Custom

2. Delivery: By air express, by sea

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FAQ

Q: What is a Human-Machine Interface (HMI)?

A: An HMI is a user interface that allows operators to monitor, control, and interact with machines or industrial processes in real time. It serves as the communication bridge between human operators and control systems such as PLCs.

Q: What industries commonly use HMI solutions?

A: HMIs are widely used in industrial automation, automotive systems, medical devices, energy management, packaging, and process control industries.

Q: How do I choose the right HMI for my application?

A: Key considerations include screen size, resolution, environmental ratings (IP/NEMA), communication protocols, processing power, and compatibility with your existing control systems.

Q: Which communication protocols are typically supported?

A: Most modern HMIs support protocols such as Modbus RTU/TCP, CAN bus, Ethernet/IP, PROFINET, and serial communication (RS232/RS485/RS422).

Q: Can your HMI integrate with different PLC brands?

A: Yes, our HMIs are designed to be compatible with major PLC brands through standard industrial communication protocols and configurable drivers.

Q: What is the typical lifespan of an industrial HMI?

A: Industrial HMIs are generally designed for long-term operation, with a typical lifespan of 5–10 years depending on usage conditions and environment.

Q: Are your HMIs suitable for harsh environments?

A: Yes, many models are designed with rugged enclosures, wide temperature ranges, and high ingress protection ratings to withstand dust, moisture, and vibration.

Q: What kind of touch technology is used?

A: HMIs typically use resistive or capacitive touchscreens. Resistive screens are preferred for industrial environments due to their reliability and glove compatibility.

Q: How secure are your HMI systems?

A: Security features may include user authentication, password protection, encrypted communication, and role-based access control to prevent unauthorized operations.

Q: Do you provide customization options?

A: Yes, we offer customization options including UI design, firmware adaptation, branding, and hardware modifications based on project requirements.

Q: What software is required to program the HMI?

A: HMIs are configured using dedicated development software that allows users to design graphical interfaces, set communication parameters, and define control logic.

Q: How long does it take to deploy an HMI solution?

A: Deployment time varies depending on complexity, but standard applications can typically be configured and commissioned within a few days to a few weeks.

Q: Do you provide technical support and documentation?

A: Yes, we offer comprehensive technical documentation, user manuals, and ongoing support to assist with integration, troubleshooting, and maintenance.

Q: Can HMIs be connected to cloud or remote monitoring systems?

A: Many modern HMIs support remote access and cloud integration via Ethernet or IoT gateways, enabling real-time monitoring and data analysis.

Q: What certifications do your HMI products comply with?

A: Our HMI products typically comply with international standards such as CE, RoHS, and, where applicable, UL certification to meet global market requirements.

As one of the most professional human-machine interface manufacturers and suppliers in China, we're featured by quality products and good service. Please rest assured to wholesale custom made human-machine interface from our factory. For more information, contact us now.

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