Within building automation hardware systems, there is a hierarchical system of micro processor based controllers. Which type of controller is used to provide limited port capacity for connection of sensors, support, and execution of DDC programs, and usually operates in stand alone mode?

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A field level controller is typically used for connecting and controlling sensors and devices within a specific area or field. It has limited port capacity and can operate in a stand alone mode, making it ideal for smaller systems or subsystems. System level controllers, on the other hand, are used for integrating multiple field level controllers and managing larger building automation systems. Management level processors are used for higher level functions such as data analytics and reporting. Protocol management systems and DDC managers are specialized software programs used to manage and communicate with building automation systems.

Within Building Automation Hardware Systems, There Is a Hierarchical System