The ABB EM3710T is a direct expansion air conditioner controller used to provide monitoring and control of commercial air conditioning systems in buildings. It is an intelligent, microprocessor-based controller which can act as a stand-alone unit, or when combined with a local area network (LAN), it can be used to provide centralized monitoring and control of a building's air conditioning system. The EM3710T includes a set of advanced features that allow it to be custom-configured to suit customer-specific requirements. These features include an easy-to-use graphical user interface, support for a wide range of commercial air conditioning products, support for various protocols and communication media such as BACnet, LonWorks, Modbus, and BMS integration. The EM3710T is a great solution for HVAC control, providing the user with a comprehensive package of features for commercial air conditioning control.