1. Main Specifications| Product Series | Harmony STO & STU | | Product Type | Touchscreen | | Display Type | QVGA TFT Color Touchscreen | | Display Colors | 65,536 colors | | Display Resolution | 320 x 240 pixels QVGA | | Display Size | 3.5 inches |
2. Key Selling PointsHigh-performance touchscreen HMI:The HMISTU655 is a 5.7-inch monochrome touchscreen HMI designed for
small to medium automation systems, offering an intuitive user
experience. Large, high-contrast display:Features a 5.7-inch STN monochrome screen with 320 x 240 pixel
resolution, providing clear text and basic graphics—ideal for local
operation and monitoring in industrial environments. Robust and industrial-grade design:Front panel rated at IP65 for dust and water resistance, suitable for mounting outside
control cabinets. Operates reliably in temperatures from -10°C to
+50°C. Multiple communication interfaces for flexible connectivity:Built-in RS-485 Modbus RTU port enables easy connection to Schneider PLCs (e.g., M221, M241,
M251), drives, and meters for seamless data exchange. Programmable with EcoStruxure Machine Expert Basic software:Configured using free EcoStruxure Machine Expert Basic software (formerly SoMachine Basic), supporting drag-and-drop
screen design, alarm management, and data logging for fast
development. Advanced local functionality:Supports multi-language switching (including Chinese), password
protection, recipe management, and historical data storage (via
optional SD card), meeting local operator needs.
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