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PWM
– valve with the possibility of the smooth change of opening through the modulation of
impulses' width. It is always a by-pass. Usually the increase of the duty cycle causes the increase
of the amount of air flowing through the valve. In case of valves controlled by high frequency (e.g.,
Bosch 0280 140 512) you should use the external flyback diode.
Stepper motor
– valve, which performing element is the stepper motor. It only requires the power
supply during the change of the stepper motor position.
EMU
G12
G17
G24
B24
Sample connection of PWM valve with flyback diode
EMU
Sample connection of bipolar stepper motor
G3
G2
G10
G11
G17
G24
B24
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