The Alerton® BACtalk® VAV-SD controller is a versatile BACnet-compliant field controller that provides pressure-independent control of any single-duct variable air volume (VAV) box. As a native BACnet controller, the VAV-SD integrates seamlessly with your BACnet system, communicating at up to 76.8 Kbps on a BACnet MS/TP LAN. With its integral airflow sensor and programming flexibility, the VAV-SD provides every option for precision VAV box control. VAV-SD—4 inputs, 1 flow transducer, 5 binary outputs, ½ amp triacs, single duct VAV control.

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