The Alerton® BACtalk® VAV-DD controller is a versatile BACnet terminal unit device that provides pressure-independent control of any dual-duct variable air volume (VAV) box. As a native BACnet controller, the VAV-DD integrates seamlessly with your BACnet system, communicating at up to 76.8 Kbps on a BACnet MS/TP LAN. VAV-DD—Four 10-bit inputs and four binary outputs.

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