controll switch for solenoid valve
controll switch for solenoid valve
(OP)
A stupid Question for a electrical engineer, but it comes from a chemical engineer.
I intend to switch a solenoid valve on/off. To do this I have got a data aquisition module here I can trigger 0 or 10 Volts output.
The solenoid valve I have got is switched by a 24Volt signal
(0 vot closed / 24Volt open).
I have got a 24 Volt power supply connecting this directly would mean the valve is always open. What I am looking for is a switch whichj is triggered by my 0 to 10 Volt data aquisition, so 0 Volt means 0 Volt supply closed valve and 10 Volt means switch open and 24 Volt supply.
I am just looking for the name of such a switch and mybe some suppliers preferably in the UK.
;)
I intend to switch a solenoid valve on/off. To do this I have got a data aquisition module here I can trigger 0 or 10 Volts output.
The solenoid valve I have got is switched by a 24Volt signal
(0 vot closed / 24Volt open).
I have got a 24 Volt power supply connecting this directly would mean the valve is always open. What I am looking for is a switch whichj is triggered by my 0 to 10 Volt data aquisition, so 0 Volt means 0 Volt supply closed valve and 10 Volt means switch open and 24 Volt supply.
I am just looking for the name of such a switch and mybe some suppliers preferably in the UK.
;)





RE: controll switch for solenoid valve
ht
David Baird
Sr Controls Designer
EET degree.
Journeyman Electrician.
RE: controll switch for solenoid valve
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: controll switch for solenoid valve
I was told that I should go for a solid state relay in order to avoid backcurrent???
What is the principle of both relay types??
RE: controll switch for solenoid valve
http://uk.
Thanks
Peter
RE: controll switch for solenoid valve
http://uk.
You should consider using a diode to protect the solid state relay output from the inductive load of the solenoid.
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If we learn from our mistakes I'm getting a great education!
RE: controll switch for solenoid valve
RE: controll switch for solenoid valve
Where exactly do I connect the diode to. I presume I will have a plus and minus on the relay load output to my solenoid, do I have to connect the diode inbetween the plus connection or does it not matter.
What kind of Diode specification do I need?
(I just remember having heard somethin about dioded dates back to my school years!!!)
RE: controll switch for solenoid valve
RE: controll switch for solenoid valve
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If we learn from our mistakes I'm getting a great education!
RE: controll switch for solenoid valve
I was investigating what kind of Diode to use and where to connect to, but the information out there for a non electronic expert is quiet owerwhelming.
So maybe someone of you can help. What kind of Diode do I need for this application.
I had a look on RS and I opted for this one:
http://
Would this work?
RE: controll switch for solenoid valve
You could get away with just using a 24V AC transformer instead of having to buy a 24V DC power supply. Just use a 1A 100V or higher diode bridge. Connect the + & - leads to the valve. The AC leads go to the SSR and transformer. With this setup you can use the AC SSR that was pictured.
RE: controll switch for solenoid valve
Just one Question you say the diode has to go in parallel. Just to claryfy. I would connect the + from my DC Power supply to the + of the SS relay and than to the + of the solenoid valve and I presume the minus of the DC Power supply directly to the minus of the solenoid valve.
Then by introducing the Diode I would again connect the + of my DC Power supply + of the SS relay than and this would be different I would connect the banded side to the positive connection of the SS relay and the other side of the Diode goes to the positive (+) of the Solid state relay.
Is that correct (sorry for the simple Question).
Thanks in advance
RE: controll switch for solenoid valve
Have a look at the link in my last post: 6A @ 100V DC from the same range as themroc originally chose. More than adequate.
themroc,
The diode should be connected across the solenoid coil with the cathode - the end with the white line or coloured band - connected to the most positive end of the coil. That diode would do fine although a 1N4001 would be just as effective and a little cheaper.
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If we learn from our mistakes I'm getting a great education!