The AE-200A Central Controller can manage up to 200 indoor units through the addition of three AE-50A Expansion Controllers. It features advanced functionality with expanded monitoring, control, dual set point and trending abilities. The AE-50A Centralized Controller also supports the humidity, occupancy and brightness sensors on the SmartME Remote Controller and displays the status of AdvancedHVAC Controller inputs and outputs on a 10.4" touch screen display or web browser interface.