Direct Digital Control Concepts

DDC stands for Direct _______ Control?

In an open loop control system, where is the input device located?

In a closed loop system, does the input sensor directly measure and/or affect the output of the system?

What are the components listed? Options: controllers, transmitters, inputs, outputs

Which of the following is an OUTPUT: occupancy sensor, Damper actuator, terminal block, GPC (general purpose controller)?

This type of signal has very precise, set changes in voltage, like steps

This type of signal is more fluid, a continuous wave that varies from one second to the next

_______ is a device that converts AC voltage to DC voltage

________ is a device that converts DC voltage to AC voltage

_______ is a device that changes the frequency of the AC voltage sine wave