The MT-3x6-S / MT-3x6-S-Tx / MT-3x6-S-Fx operator interfaces are intelligent visualization systems for automation applications. In line with ATEX directive 94/9/EC they may also be installed in hazardous areas of zones 2 and 22. The devices may be fitted in control cabinets, panels etc. Users operate the device via the membrane keyboard integrated into the front plate and via the LCD display with touch screen. The operator interfaces communicates with control and automation systems via the serial interfaces (RS-232, RS-422/485, Ethernet) located in the connection box at the back of the devices. Various peripheral devices, such as barcode scanners, card readers, USB sticks and WLAN / Bluetooth modules can be connected via USB interfaces or optional fitted modules. With a wealth of functions, these operator interfaces provide optimum visualization. Their active communication concept in combination with integrated functionality reduce the automation system workload. In terms of software and functionality, the MT-3x6-S / MT-3x6-S-Tx / MT-3x6-S-Fx operator interfaces are compatible with their predecessors, the MT-315 and MT-335.