valve wiring diagram and Connection to NI Daq

[vnarang]

Hi

I am Vikas,I want to control a 3 way prpotional control valve thru NI DAQ and LAB view.I have hard time in understanding wiring diagram of the 3 way valve.I have NI-9201 Analog Input Module and NI 9263 Analog out put module.I have attached the wiring diagram.

Please comment and advise me.I have mentioned my question on the pucture attached.which NI daq wire number 3 and wire Number 4 need s to be connected.

[Dennis_Knutson]

You might have trouble getting people to even look at your image. For the second time today, Do NOT try to get around the ban on bmp images by simply doing a rename of the file.

[Jonathan_S1]

That diagram is a little ambiguous.  Do you have any more information, such as the manufacturer or part number?  I've done a bit of research, and it looks like its made by Belimo.  If you could provide the exact part number, it would be helpful, as it looks as though the device can be both current and voltage driven. My guess is that the valve sets its position through the voltage provided at the input terminal.  You would do this by wiring an analog output from your 9263 onto this connection  (Connect ground of the card to common of the actuator).  I'm guessing the output from the valve indicates the actual position of the valve.  You would read this in using an anlog input channel on you 9201 input module.  If you could provide more info about the actuator, it would be very helpful.

Jon S

[vnarang]

Thanks Jon for the reply.I have attached the manual for that valve.Please see the attached file.

In cable 1,there are two wires

1-common

2- Hot+

where I have ato connect these wires?

They have mentioned about some resistance do I have to connect this resistance externally or its alreaedy installed inside.?

[Jonathan_S1]

Cable 2 is your power supply.  It says the device uses an appliance rated cable.  This is rated as 120 V AC, which is the standard outlet power.  This leads me to believe that the device originally had a cable that came with it.  You somehow need to get it plugged into the wall.  This is something that you should take extreme care in doing.  If you have never hooked up a device this way, I'd recommend finding someone who has, as messing around with your wall outlet power can be dangerous and should not be taken lightly.  If you haven't had any exposure to electrical safety, it would be wise to brush up on this.

The 500 Ohm resistor is connected externally between the input high and common.  It is meant to be used if you are providing a current to drive the device.  I would recommend installing a resistor regardless, as it provides a return route for any leakage currents to the common terminal.

Jon S

[vnarang]

Hi Jon

Thanks for the reply.

Cable 2 is not the issue,its connections are already been done.I am confused with cable 1.I have attached a picture showing how I have doen the connections of cable 1 with DAQ.

In cable 1 there are four wires as shown below

___________________________________

I                                             I               I

I                                             I               I

I    1.Common                        I Cable-1  I

I     2.Hot+                              I               I

I                                             I               I

I                                             I               I

I    3.Y Input                           I               I

I    4.U Output                        I               I

I                                             I               I

I                                             I               I

I_________________________ I ________I

No 3.Y input goes to NI 9263

No 4 U Output goes to NI 9201.

No.2 Where does this go?{This is my main confusion]

I have also attached the figure.

I appreciate your time and effort U r putting in to solve my problem

regards

Vikas

[Jonathan_S1]

Hi,

It's not really clear from the documentation.  I would assume the Hot(+) is the same line as the power line, but I'd recommend contacting the manufacturer to confirm that.

Jon

[vnarang · Accepted solution]

Hi Thanks a lot for your help.I talked to Valave manufacturers.They told me,I cna just leave it as it is and valve will work fine.I will try this and will let U know.

Thanks a lot

[vnarang]

Thank you very much all of you for help

[Jonathan_S1]

You're welcome!  Glad we could help you get up and running.

Jon