Class:DDC 101 Instructor : Jack Floyd Fall 2012. Objectives. The purpose of this class Define what a DDC Control System is Define the two types of DDC Control Systems Give you the basic structure of a DDC Controls System Determine the difference between DDC System Applications
Instructor: Jack Floyd
Easy to install/Easy to Configure
Must match the controller to your application when selecting
Must configure controller properties to match the type of controller
a VAV application may have Fan Powered Boxes as well as VAV boxes the configuration
must be specific to the type of equipment
Why is this important from a service view?
What if a point is miss configured?
Can be applied to virtually any application
Make sure you match the hardware inputs and outputs to the application (use expansion modules if necessary)
Must match the controller hardware to the equipment hardware
be sure you have an output that is 0-10vdc going to a 0-10vdc device input
The Daisy Chain
The DDC System in made
Up of three basic items
The equipment or process
The DDC controller
Daisy Chain Network: The daisy chain is the most common type of
Communications network wiring. There is only one start and one
End to a daisy chain network wiring.
Having the Network properly grounded can keep from having unwanted communication errors.
Will this work in all applications? Why or Why not?