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I/O Bus VAV Unitary Controller

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The IOB-VAV I/O Bus Module provides a SAC with a unitary VAV controller.   The module comes in many factory assembled configurations for use as a complete unitary airflow station.  The module can include remote flow sensor and its input circuitry, motor and its output drive circuitry, and additional inputs and outputs.   The flow sensor module is a Kalvico.

  • provides an expansion VAV module to any SAC panel



  • inputs (i.e. for Kalvico flow sensor (1 in. of water), or other input devices)
  • output drive circuitry for M1 motor, Belimo LM24-M motor or other devices
  • feedback positioning potentiometer (optional)
  • PIC controller for I/O Bus communications
  • 8 bit A/D
  • PWM output 8 bit resolution


  • powered from I/O Bus or 24 VAC


  • 9600 bps
  • uses Walker ASCII Protocol


  • 18 gauge twisted Pair shielded (same cable used for SmartLAN)

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Left click to view with Acrobat Reader Right click & "Save Target As..." to download PDF file: IOB VAV.pdf

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