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audioguru said:You will need some majic or a miracle to convert 10W into 24W.
Your application doesn't need to convert anything. The 10V can turn on a relay or transistor that applies the 24V from a 24V power supply to the valve.
Not me. Styx recommended using an amplifier. I recommended using a switch.Nigel Goodwin said:audioguru said:You will need some majic or a miracle to convert 10W into 24W.
You are been deliberately obstructive! :lol:
You know full well that an amplifier actually does no such thing, but merely produces a larger copy by modulating a higher voltage supply, or providing a larger current capability.
Surely the valve has a motor spinning gears and needs to have its power applied for a certain amount of time to control the amount of its opening.Nigel Goodwin said:audioguru said:Your application doesn't need to convert anything. The 10V can turn on a relay or transistor that applies the 24V from a 24V power supply to the valve.
He does say 'proportional valve', so presumably it requires a varying voltage to set it's degree of opening?.
audioguru said:Surely the valve has a motor spinning gears and needs to have its power applied for a certain amount of time to control the amount of its opening.
I don't think a proportional voltage would do it, too much loss of torque at a low voltage.
demirural said:I have an analogue output card that I use with an s7/300 PLC that is 0-10V and need to drive a proportional hyraulics valve that works 0-24V
The valf says maximum 1amp and the circut breaker for the output card is also 1amp.
demirural said:The system works as Nigel Goodwin has described,
The varying voltage supply to the valve controls the restrcition over it controling the flowrate that changes the speed of the actuators in the system. Just a proportional valve only a relay and springs no motors or such to control the opening.
with 0 to 10V I can only open it to half way that causes the machine to move slowly.
By the way another idea is to connect the two 0-10V outputs of the analogue output card in series, then do I have 0-20V to control or do I damage the equipment?