The D1 PWM valve driver from Enfield Technologies was designed to drive and manage the company's proportional valves, as well as those of several other brands. The D1 converts proportional command voltage into a -1.1…1.1A current signal to drive the valve's linear force motor. The D1 can help users avoid the effort and expense of characterizing valves and developing electronics for their application.
The D1 allows a 12 or 24 VDC power supply, to accommodate most applications. Its valve deadband, dither amplitude and maximum current are all adjustable. For applications using programmable logic controllers or computers, the D1 interfaces with the valve.
Its digital closed loop current control compensates for different types of perturbations, such as change in the input voltage and change in the coil resistance due to temperature. Other features of the D1 driver include short circuit protection, a design with no heat sink required and LED indicators for power and status/fault activity. The D1 features a temperature range of -40 degrees Celsius to 65 degrees Celsius.
The unit's enclosed format is suitable for panel mount systems or applications where the electronics will be exposed to end-users. The D1 comes with a DIN clip for rail mounting, or the clip can be removed for flat surface mounting either from within the enclosure or from the bottom.