Introduction: Compact human-machine interface for industrial automation
In modern industrial automation systems, human-machine interface (HMI) devices not only need to provide intuitive operating interfaces, but also need to have strong communication capabilities and flexible functional expandability. The Eaton XVS400 series 5.7-inch touchscreen is a compact HMI-PLC integrated solution designed to meet these needs. This device adopts infrared touch technology, equipped with STN color display screen, integrates multiple communication interfaces such as Ethernet, RS232, PROFIBUS/SPI, and supports users to load PLC functions by themselves, providing a highly flexible operating terminal platform for machine and equipment manufacturers.
This article provides a comprehensive analysis of the technical features, interface configuration, software ecosystem, and application points of the XVS400 5.7-inch touch screen (order number 139968) based on Eaton's official product data sheet.
Chapter 1 Product Overview and Core Features
1.1 Product positioning
The XVS400 5.7-inch touch screen belongs to the Eaton XVS400 product series and is positioned as an HMI-PLC integrated device with expandable functions. The core design concept is:
Users can configure PLC functions: As a pure HMI terminal, the basic equipment allows users to load PLC functions themselves by purchasing a license
Scalable communication range: Expand the communication function of the onboard interface through license extension
Compact design: 5.7-inch screen size, suitable for applications with limited space
1.2 Core Features
Characteristic description
Product series XVS400 5.7“
Function type HMI-PLC (PLC is loaded by the user)
Display type CSTN color display screen
Touch Technology Infrared Touch
256 colors in total
Resolution QVGA 320 × 240 pixels
Screen diagonal 5.7 inches
Horizontal/Vertical Screen Support Vertical Screen Display
Shell material: metal shell and front panel
Operating System Windows CE (License Required)
PLC license user can load, order number 140389 LIC-PLC-MXP-SMALL
Communication license can be extended as needed
Chapter 2 Detailed Explanation of Technical Specifications
2.1 Display System
The XVS400 5.7-inch adopts CSTN (Color Super Twisted Nematic) display technology, which is an enhanced version of STN display technology and has the following characteristics:
Parameter specifications
Display type CSTN color
Resolution QVGA 320 × 240 pixels
256 colors in total
Visible area 115 × 86 mm
Contrast ratio 35:1 (typical value)
Brightness of 150 cd/m ² (typical value)
Backlight technology 1 × CCFL, software dimmable
Backlight lifespan of 50000 hours (typical value)
Backlight dimming: CCFL backlight can adjust brightness through software, and users can adjust display brightness according to ambient lighting and usage needs, ensuring visibility and extending backlight life.
2.2 Touch System
XVS400 adopts infrared touch technology and has the following characteristics:
Parameter specifications
Touch Technology Infrared Touch
Logical channel 47 × 31
Protective screen laminated safety glass, anti reflective
Working principle of infrared touch: The device arranges infrared emitting and receiving tubes around the screen to form an infrared light matrix. When fingers or objects (with a minimum diameter of 7mm) block infrared light, the system can detect the touch position. This technology does not require direct contact with the screen surface and has the following advantages:
Long service life: no mechanical wear and tear
Strong anti pollution ability: The screen surface is sealed and can be dustproof and waterproof
Support glove operation: suitable for industrial environments that require wearing protective gloves
2.3 System Configuration
Parameter specifications
DRAM (Operating System and Program Memory) 64 MB
Flash (User Available Data Backup) approximately 1.5 MB
External storage CompactFlash ™ Card (to be provided by the user)
Real time clock backup battery CR2032 lithium battery
The battery life is about 10 years
The power outage lasts for about 10 years
Storage requirements: The device requires a CompactFlash card for storing the operating system, applications, and data. Users need to choose the appropriate CF card capacity according to their application requirements.
2.4 Heat dissipation and power consumption
Parameter specifications
Static heat dissipation (non current related) 19 W
Total heat dissipation capacity 19 W
The cooling design of the equipment is 19W, and the cooling conditions inside the control cabinet should be considered during installation to ensure sufficient ventilation space around the equipment.

Chapter 3 Communication Interface and Expansion Capability
3.1 Onboard Interface
XVS400 5.7-inch integrated with rich communication interfaces to meet various industrial network requirements:
Description of interface type quantity
Ethernet 1 100Base TX/10Base T
RS232 1 serial communication interface
PROFIBUS/MPI 1 supports Siemens PROFIBUS and MPI protocols
USB Host 1 is used to connect external USB devices
USB Device 1 is used to connect to the upper computer for programming and debugging