The LonMark Certified controllers for Oil and Gas Industries have been designed by Distech Controls to comply with Standard 2104 for HVAC Equipment design and Standard 0487, Building management and Automation Systems. The ECL-600 AHU Series are microprocessor-based programmable controllers designed to control air handling units. This series contains two models as follows: ECL-600 AHU, and ECL-650 AHU. The ECL-600 AHU series models have universal inputs and outputs that are ideal for controlling a wide range of HVAC equipment. The ECL-650 AHU model has a full-color backlit-display and a jog dial for turn and select navigation to access a wide range of internal controller functions: view, set, and override values, view and modify schedules, tune PID loops with system response graphing, and view connection and communication alarms.