What voltage are these hydraulic valves and how to I control them?
Engineering Asked by Terry Gould on December 26, 2020
I am building a new control system for an injection moulding machine, the last part I am trying to work out is the main pump.
It has two proportional valves on the output, one labelled throttle valve and one labelled pressure limiting valve.
The throttle valve is connected between the pump outlet and the pressure limiting valve is connected between the pump control line and the tank return.
I think that you use the throttle valve to control the pump pressure and use the pressure valve to control the bypass pressure which is just like an energy saving thing. Is this the correct way of thinking?
The main question is though was voltage is do I use to control the valves and what is the pinout for the 3 pin feedback connector on the end on each valve?
Pictures of the pump and valves:
One Answer
After some research, I found out that the valve is 0-24v DC and the output from the feedback sensor is 0-20ma. They are designed to work with a Bosch controller but can be used with any PLC if an amplifier with the correct gain is used.
Correct answer by Terry Gould on December 26, 2020
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