Designing Buildings at 07:28, 6 July 2021

2021-07-06T07:28:09Z

← Older revision		Revision as of 07:28, 6 July 2021
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	[https://www.bsria.com/uk/product/oBKRqD/illustrated_guide_to_mechanical_building_services_3rd_edition_bg_312017_a15d25e1/ The Illustrated Guide to Mechanical Building Services, Third Edition (BG 31/2017)], by David Bleicher, published by BSRIA in 2017, defines direct digital control systems (DDC) as: ‘…microprocessor-based with analogue inputs from sensors that are digitised. Some manufacturers make a distinction between DDC intended for primary plant control, such as for boilers, and those intended for secondary or terminal unit control such as fan coil units. Primary DDC units are freely programmable with control software configured for a particular method of plant control. DDC units intended specifically for terminal units usually have specific application software built in and only relatively minor configuration settings may need to be adjusted.’		[https://www.bsria.com/uk/product/oBKRqD/illustrated_guide_to_mechanical_building_services_3rd_edition_bg_312017_a15d25e1/ The Illustrated Guide to Mechanical Building Services, Third Edition (BG 31/2017)], by David Bleicher, published by BSRIA in 2017, defines direct digital control systems (DDC) as: ‘…microprocessor-based with analogue inputs from sensors that are digitised. Some manufacturers make a distinction between DDC intended for primary plant control, such as for boilers, and those intended for secondary or terminal unit control such as fan coil units. Primary DDC units are freely programmable with control software configured for a particular method of plant control. DDC units intended specifically for terminal units usually have specific application software built in and only relatively minor configuration settings may need to be adjusted.’
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		+	Networked DDC systems: '...consist of two or more DDC controllers that are connected together enabling the exchange of information. Each controller usually controls one particular plant group and can operate autonomously in the event of communications loss. Typical examples of information exchanged between controllers are shared sensor readings, common plant start signals, and interlock signals between different plant groups. If a networked DDC system includes one or more permanent operator terminals it is classified as a building management system (BMS).'

	--[[User:BSRIA\|BSRIA]]		--[[User:BSRIA\|BSRIA]]

Designing Buildings: Created page with "[https://www.bsria.com/uk/product/oBKRqD/illustrated_guide_to_mechanical_building_services_3rd_edition_bg_312017_a15d25e1/ The Illustrated Guide to Mechanical Building Services, ..."

2021-07-05T08:56:43Z

Created page with "[https://www.bsria.com/uk/product/oBKRqD/illustrated_guide_to_mechanical_building_services_3rd_edition_bg_312017_a15d25e1/ The Illustrated Guide to Mechanical Building Services, ..."

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[https://www.bsria.com/uk/product/oBKRqD/illustrated_guide_to_mechanical_building_services_3rd_edition_bg_312017_a15d25e1/ The Illustrated Guide to Mechanical Building Services, Third Edition (BG 31/2017)], by David Bleicher, published by BSRIA in 2017, defines direct digital control systems (DDC) as: ‘…microprocessor-based with analogue inputs from sensors that are digitised. Some manufacturers make a distinction between DDC intended for primary plant control, such as for boilers, and those intended for secondary or terminal unit control such as fan coil units. Primary DDC units are freely programmable with control software configured for a particular method of plant control. DDC units intended specifically for terminal units usually have specific application software built in and only relatively minor configuration settings may need to be adjusted.’

--[[User:BSRIA|BSRIA]]

= Related articles on Designing Buildings Wiki =

* BSRIA articles on Designing Buildings Wiki.
* BSRIA definitions.
* BSRIA.
* Building services.
* Cooling.
* Heating.
* Compensator.
* Optimiser.
* Solar gain.
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* Valve.

[[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:Definitions]] [[Category:Products_/_components]]

Direct digital control systems - Revision history

Designing Buildings at 07:28, 6 July 2021

Designing Buildings: Created page with "[https://www.bsria.com/uk/product/oBKRqD/illustrated_guide_to_mechanical_building_services_3rd_edition_bg_312017_a15d25e1/ The Illustrated Guide to Mechanical Building Services, ..."