PWM electronic regulator for single solenoid proportional valve VPOL

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Electronic regulator for double solenoid proportional control valve VPUD-M

Working description

The VPUD-M electronic regulator is designed to command two proportional solenoids with one reference signal. Solenoids are controlled (PWM) with feedback signal so that linearity between output current and input signal is guaranteed and working is independent from external elements (supply voltage, temperature, etc.). The working frequency (PWM) is set to 120 Hz but it is adjustable from 50 Hz to 330 Hz).

The regulator can be commanded by a potentiometer (the supply voltage ±5V are present) but 0 to 10V or ¼ ÷ ¾ Vsupply signals can be utilised (coupling with a PLC). Outputs cannot be active contemporaneously,interlocked by a control circuit.

Minimum (BIAS) and maximum (GAIN) currents and rise/fall ramps are independently adjustable. Ramps are adjustable (between 0.1 and 5 seconds) and disabled by a positive signal connected to the proper input terminal. Red LEDs on panel show input signals variation and current variation to the solenoids, signalling if the output circuit is interrupted.

The regulator is protected against voltage reversal and output short circuits.

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