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The D400 EX (explosion proof) unit is completely contained in a rugged die-cast aluminum housing. FM, CSA, Atex approvals are available meeting a wide range of classifications, divisions, and group listings. The unit has a unique cover arrangement that allows for simple entry into the calibration/configuration chamber, while not exposing internal components and thus breaking the hazardous area classification. The D400 can be fully calibrated and even configured from onboard push buttons or via a handheld device or network. The external visual indicator can be adjusted for various rotations or degrees. Available in Hart, Foundation Fieldbus, and Profibus, this microprocessor-based positioner is available in all key process industry communication standards. Options such as fail in place, 4-20 mA feedback (Hart only), microswitches, gauge block, rotary or linear mounting are all standard options for the D400EX unit. The unique standard option of “adaptive control”, allows the customer to update the complete valve package to “adapt” to process changes, while not disturbing the Operation mode. The very low bleed product utilizes proven air handling technology for dependable service, while the microprocessor and software add accuracy and flexibility to this positioner package.

D400 Features

The VAC D400 is a microprocessor-based, “intelligent” instrument that can be mounted to rotary or linear pneumatic actuators for accurate positioner control. This unit, while sophisticated in its accuracy and performance, is simple to mount, calibrate, and with well-filtered air and proper maintenance, can provide very accurate and trouble-free service for many years. With local push-button calibration and LCD, no expensive handheld devices are needed for basic set up and calibration. Available with Hart, Foundation Fieldbus, or Profibus communication, the D400 range of applications and communications meets the latest industry standards. The “efficiencies” of the D400 are not only in its microprocessor-based technology and accuracy but also in the pneumatic air handling where air consumption is kept to a very minimum.


D400 Digital Positioner Brochure
D400-EX Wiring
D400-EX Technical Specs
D400-EX Ordering Codes
D400-EX Quick Start Handbook
D400-EX Hart EX Manual
D400-EX Fieldbus EX Manual
D400-EX Profibus EX Manual
D400 Dimensional Drawing
D400 3.0 Menu Structure
D400 5.0 Menu Structure
D400 EX Detail
D400 Software Download
D400 Spindle Drawing
D400 Push-button Instructions