direct digital control (DDC) definition

direct digital control (DDC) means a type of control where controlled and monitored data, in analog or binary form, is converted to digital format for manipulations and calculations by a micro-processer and then converted back to analog or binary form to control physical devices.
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Examples of direct digital control (DDC) in a sentence

  • An electronic direct digital control (DDC) system shall incorporate stand alone, remote control units at each of the new air handling units.

  • Temperature control system may be either direct digital control (DDC) or pneumatic.

  • Complete direct digital control (DDC) building automation system (BAS) with open BACnet protocol that will control all HVAC equipment.

  • The pneumatic system, which uses air pressure and compressors to regulate scheduling and temperature control, has been largely replaced with electronic, or direct digital control (DDC) systems.

  • The control system shall be replaced with an electronic direct digital control (DDC) system with common computer front end BAS for entire building including lighting.

  • The building shall include a fully integrated, open protocol, direct digital control (DDC), building automation system (BAS).

  • The BAS shall utilize direct digital control (DDC) and electronic actuation.

  • Our recent project comprised of a diverse set of scope items, including retrocommissioning direct digital control (DDC) systems, adding variable frequency drives (VFDs) to motors, HVAC unit replacements, LED lighting upgrades, a vehicle washing water reclaim system, and a boiler replacement.

  • The direct digital control (DDC) will consist of 5 zones per floor with an additional zone for the parking lot lighting.

  • Navitas has implemented M&V practices that capitalize on the availability of modern direct digital control (DDC) Systems to provide long term measurement and verification services that can be utilized to quantify and optimize facility performance.

Related to direct digital control (DDC)

  • Game-related digital content means digital content that exists only in an electronic game or electronic-game platform.

  • digital content means data which are produced and supplied in digital form;

  • Digital Cross Connect System or "DCS" is a function which provides automated Cross Connection of Digital Signal Level 0 (DS0) or higher transmission bit rate digital channels within physical interface facilities. Types of DCS include but are not limited to DCS 1/0s, DCS 3/1s, and DCS 3/3s, where the nomenclature 1/0 denotes interfaces typically at the DS1 rate or greater with Cross Connection typically at the DS0 rate. This same nomenclature, at the appropriate rate substitution, extends to the other types of DCS specifically cited as 3/1 and 3/3. Types of DCS that cross connect Synchronous Transport Signal level 1 (STS-1 s) or other Synchronous Optical Network (SONET) signals (e.g., STS-3) are also DCS, although not denoted by this same type of nomenclature. DCS may provide the functionality of more than one of the aforementioned DCS types (e.g., DCS 3/3/1 which combines functionality of DCS 3/3 and DCS 3/1). For such DCS, the requirements will be, at least, the aggregation of requirements on the "component" DCS. In locations where automated Cross Connection capability does not exist, DCS will be defined as the combination of the functionality provided by a Digital Signal Cross Connect (DSX) or Light Guide Cross Connect (LGX) patch panels and D4 channel banks or other DS0 and above multiplexing equipment used to provide the function of a manual Cross Connection. Interconnection is between a DSX or LGX to a Switch, another Cross Connection, or other service platform device.

  • Universal Digital Loop Carrier (UDLC) means the DLC system that has a CO terminal channel bank that is connected to the CO switches on the analog side.

  • Direct Load Control means load reduction that is controlled directly by the Curtailment Service Provider’s market operations center or its agent, in response to PJM instructions.