SCHNEIDER HMISTU855 Harmony STU Color Touch Panel HMI

Overview

The SCHNEIDER HMISTU855 is a 5.7 inch color TFT touchscreen operator interface from Schneider Electric Harmony STU series. The SCHNEIDER HMISTU855 features QVGA 320×240 resolution and 65K color display, designed for machine visualization, parameter setting and fault alarm monitoring. It supports multiple communication protocols to connect with Schneider PLCs and third-party controllers, and it can store screen projects, recipe data and event logs. The SCHNEIDER HMISTU855 is widely used as spare replacement for packaging, conveyor and process machinery control panels.

Features

The SCHNEIDER HMISTU855 adopts ARM9 processor with 333MHz clock speed and 16MB application memory. It provides Ethernet port, RS232/RS485 serial port and dual USB interfaces for programming, data upload and peripheral connection. The SCHNEIDER HMISTU855 has IP65 front panel protection and NEMA 4X rating, suitable for dust and splash workshop environments. It supports multi-language display and recipe management for batch production switching. The SCHNEIDER HMISTU855 uses easy cutout mounting and tool-free installation, matching the original wiring layout for direct replacement.

Specs

Device Type: Harmony STU touch screen HMI Model: SCHNEIDER HMISTU855 Display: 5.7 inch TFT color, 320×240 QVGA, 65536 colors Touch Type: Analog resistive touch Processor: ARM9 333MHz Memory: 16MB application memory, 64KB data backup memory Power Supply: 24VDC, 20.4V to 28.8V range, 6.8W Communication: Ethernet, RS232/RS485, USB mini-B, USB-A Protection: Front IP65, rear IP20, NEMA 4X Backlight Life: 50000 hours Application: Industrial machine HMI, process monitoring, equipment operation panel

Principle

The SCHNEIDER HMISTU855 exchanges real-time data with the connected PLC or controller through communication ports. It reads sensor values, running status and fault codes to display on graphic screens. Operators touch the screen to send setpoint, start, stop and reset commands to the control system. The SCHNEIDER HMISTU855 records alarm events and recipe data locally, and uploads logs via USB or network when needed. It will trigger communication warning signal if the link with the controller is interrupted.

Applications

The SCHNEIDER HMISTU855 is used for packaging machines, textile equipment, conveyor systems and small process skid operation panels. It serves local monitoring and parameter adjustment for water treatment, HVAC and food processing automation. The SCHNEIDER HMISTU855 applies to spare stock and field replacement of existing Harmony STU HMI installations. It also supports retrofitting upgrade of legacy machine operator terminals.