The DAK series touchscreen operator panels are Human Machine Interfaces for ASI Controls controllers and control systems. The screen supports fingertip or touch-pen operation, with color graphics for an intuitive understanding of control system status and operating conditions. The DAK’s supports up to 10 languages (any Windows supported language can be specified), Unicode system and supports BMP, JPG and GIF graphic formats. The data display in numerical, text and graphic. It allows the display controller status, the modification of setpoints and schedules, intervention in controller operation via overrides, and to annunciate and acknowledge alarms. The DAK’s are page based. The operator can select one of its pages. Scrolling up or down the page accesses data. The page structure allows rapid access to data. Numeric data can be scaled, or used to display one of a list of messages. Binary data can display differently on and off label. Controller labels such as Description, Input, Output and Schedule Name can be displayed as strings. The DAK’s interact with the controllers on the system communicating bus. This leaves the system bus free for communication with other controllers and/or the Building Management and Control System (BMCS). Data from one or more controllers can be placed on a series of screens. The choice of data to be displayed is made at the time the DAK is configured. The configuration is kept in non-volatile memory so that it does not lose program data during power interruption. The DAK-5043 series provided RS-232, RS-422, RS-485, Ethernet and USB communicating interface and ASI or Modbus communicating driver. The DAK-5070 series provided RS-232, RS-422, RS-485, Ethernet and USB communicating interface and ASI or Modbus communicating driver. The DAK-5080 series provided RS232, RS422, RS485, Ethernet and USB communicating interface and ASI or Modbus communicating driver. The DAK-5101 series provided RS232, RS422, RS485, Ethernet and USB communicating interface and ASI or Modbus communicating drivers.