direct digital control


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direct digital control

[də¦rekt ¦dij·əd·əl kən′trōl]
(control systems)
The use of a digital computer generally on a time-sharing or multiplexing basis, for process control in petroleum, chemical, and other industries.
References in periodicals archive ?
Cypress Envirosystems' patent pending WPT solution retrofits existing pneumatic thermostats to deliver direct digital control (DDC) functionality in minutes.
The patent-pending WPT solution retrofits existing pneumatic thermostats to deliver direct digital control (DDC) functionality in minutes.
In general the work consists of: Removal of all pneumatic HVAC temperature control devices, air tubing, air compressor and accessories and the installation of new a direct digital control system for the HVAC systems.
Cypress Envirosystems' patent pending Wireless Pneumatic Thermostat solution retrofits existing pneumatic thermostats to deliver direct digital control (DDC) functionality in minutes.
Siemens technicians will conduct the daily monitoring and maintenance of all direct digital control hardware and related devices.
The WPT retrofits pneumatic HVAC systems to provide the benefits of modern Direct Digital Control (DDC) systems, but at a fraction of the cost and with virtually no disruption to building occupants.
Units shall be controlled by the Siemens Direct digital control system with both temperature control and dehumidification algorithms.
Upgrading dated equipment, such as pneumatic variable air volume boxes, with direct digital control technology for improved energy conservation.
The County used Cypress Envirosystems' innovative Wireless Pneumatic Thermostat to retrofit pneumatic HVAC systems to provide the benefits of modern Direct Digital Control (DDC) systems, but at a fraction of the cost and with virtually no disruption to building occupants.
The Wireless Pneumatic Thermostat is an extremely innovative technology that enables existing buildings to upgrade from traditional pneumatic HVAC controls to the benefits of Direct Digital Control," said Michael Ridout, General Manager, ACCO Engineered Systems.
com)-- Direct Digital Controls is pleased to announce that they have been awarded the 2013 Alerton Platinum Dealer Award.
Upgrades included installing direct digital controls of facility systems, as well as LED lighting with occupancy sensors, new HVAC systems and solar-thermal heating panels.