Schneider Electric HMISTU855 Harmony STU 5.7 inch colour touch panel screen with Ethernet. The Schneider Electric HMISTU855 is the 5.7 inch member of the Harmony STO and STU small panel family, with a QVGA TFT colour touchscreen at 320 x 240 pixels, 65536 colours, a 50000 hour backlight and 16 brightness levels. An ARM9 processor running at 333 MHz drives 16 MB of application memory plus 64 kB of data backup. HMISTU855 is powered from 24 V DC with limits of 20.4...28.8 V and consumes 6.8 W. Ports comprise a COM1 RS232C/RS485 serial link on a female RJ45 up to 115.2 kbit/s, an Ethernet RJ45 port and USB 2.0 type A and type mini B connectors, supporting Modbus, Modbus TCP/IP, Uni-TE and third-party protocols. The split front/rear construction fixes through a 22 mm diameter hole. Protection is IP65 at the front and IP20 at the rear, operating 0 to 50 C. HMISTU855 suits water treatment, food and beverage, packaging and cement control panels in Egypt and the GCC.