The HMISTU655 is a touch panel screen from the Harmony STO & STU range, designed for human-machine interface (HMI) applications. It features a 3.5-inch QVGA TFT colour touchscreen with a 320 x 240 pixel resolution and is powered by a 333 MHz ARM9 CPU. The device includes 16 MB of application memory and offers versatile connectivity with Ethernet, USB, and a COM1 serial port supporting RS232C/RS485. Operating on a 24 V DC supply, the HMISTU655 is built for industrial environments, featuring an IP65-rated front panel and simple mounting through a standard Ø 22 mm hole.