Home About Us Field Devices Systems Services Contact Us
JBS Services
71 West Drive, Unit # 21, Brampton, ON, L6T 5E2

What are DDC controls?
What are DDC controls?
February 03, 2016

Direct digital controls (DDC Controls) are simply the automated control of a process through a computer or a digital device. In reality, a DDC control is considered more responsive, granular and modern compared to a HVAC control system that is based on PLC technologies. HVAC control systems are set in such a way that each zone is self-sufficient, containing all the control elements required for considering digital and analogue outputs, and then taking actions according to the set rules. The biggest shortfall comes from the desire to expand the PLC zones to a collection of controlled elements for a wider system. The process of connecting the zones is complex, and creating rules that have to be loaded individually is just impractical.

DDC controls take a creative network-oriented approach through a centralized system. All the instruments are gathered by various digital and analogue converters that use the network to move signals to a centralized computer. This computer then follows its production rules to induce action through the same network. Actions may include moving valves and actuators, creating certain forces or triggering certain motions.

The central controllers for DDC controllers are programmable, and hence the code can be customized depending on the indented purpose. Several things can be amended; including schedules, timers, trend logs, alarms, set points and logic. Just like HVAC systems, the DDC controllers have both digital and analogue inputs, allowing the measurement of the variables for the control of the medium.  Digital inputs can be seen as dry contracts from the digital device while analogue inputs are the current measurement drivers.  The role of the digital outputs is to relay contacts for starting and stopping equipment while analogue inputs are signals for controlling the movement of the medium control devices. JBS a fully fledged dealer in customized DDC controls for both extensive and average building facilities.

I agree, my customized system is working perfectly and has been for years!
Posted by: Garen | June 2, 2016, 3:58 pm
Can you customize for a building of 10,000 sq ft.?
Posted by: Kristoff | May 5, 2016, 1:06 pm
There are so many advantages of using DDC! Nice article
Posted by: Josh | March 22, 2016, 11:46 pm
I appreciate how they are very knowledgeable in regards to their products. They are thorough and accommodating. I asked a lot of questions and a not sign of annoyance from them unlike other companies
Posted by: Jessie | February 10, 2016, 1:13 pm
*** Your email address will not be published.



Request a Quote

Message / Order details: