A DDC panel is a type of control system that is used to monitor and manage a variety of different functions within a building or facility. It is typically composed of a central control unit, a series of sensors, and a variety of input/output devices. The control unit is typically a computer or a programmable logic controller (PLC) that is programmed to monitor and control the various systems within the building. The sensors are typically used to detect changes in temperature, humidity, pressure, and other environmental factors. The input/output devices are typically used to provide feedback to the control unit and to allow for manual control of the systems. DDC panels are used in a variety of applications, including HVAC, lighting, security, and fire safety systems. They are often used in commercial buildings, factories, and other large facilities. DDC panels are also becoming increasingly popular in residential applications, as they provide a more efficient and cost-effective way to manage a variety of different systems.