DDC stands for which term?

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Study for the ACG Certified Commissioning Authority (CxA) Exam. Prepare with flashcards and multiple choice questions, each comes with hints and explanations. Ace your exam!

Multiple Choice

DDC stands for which term?

Explanation:
In building automation and HVAC control, DDC stands for Direct Digital Controls. This means a microprocessor-based system that directly reads sensors, runs control logic in software, and sends commands to actuators, enabling precise, programmable control of equipment. It’s the standard term in CxA practice because it describes how the controller processes digital signals and communicates digitally with field devices, replacing older pneumatic or purely analog approaches and enabling modern networking with protocols like BACnet or Modbus. The other phrases aren’t the established term for this concept in this field.

In building automation and HVAC control, DDC stands for Direct Digital Controls. This means a microprocessor-based system that directly reads sensors, runs control logic in software, and sends commands to actuators, enabling precise, programmable control of equipment. It’s the standard term in CxA practice because it describes how the controller processes digital signals and communicates digitally with field devices, replacing older pneumatic or purely analog approaches and enabling modern networking with protocols like BACnet or Modbus. The other phrases aren’t the established term for this concept in this field.

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