Multifunction DAQ

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use usb 6009 to switch on the fan

 i want to use the output analog channel from my USB6009 to switch on the 220V heater. i need to know that what type of relays i need to connect and what circuit will require to do that.

any one tell me the how can i connect these things.


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Message 1 of 4

You will need something with a 5VDC control side and a 220VAC contact side. You need to make sure that the relay that you purchase does not require more power than the daq can provide for the control side.

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Solid State Relay (SSR). Just need to make sure the output of the DAQ can supply enough current to turn on the relay.



"It’s the questions that drive us.”
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thanks bro,


yes i am using a SSR whose input control voltage range 3 to 32VDC and out put is 24-280AC rms and current input is 3.4mA @ 5VDC. i think it is fine with NI 6009.

But the thing is that i need to set the different speeds of the fan.i.e. i want to control the speeed of the fan as well. Mean to say wen i change the the volts form the NI device like 0 to 5volt from lab  view knob the speed of the fan in out side will also need to change.

Can u tell me the device which i use between the fan and Ni device.If i chnge the voltage from the Analog output channel (3to 3.5 or 4) in the real world fan the speed increases.(Might be the input voltage to the fan increases from 20 to 40 or 40 to 60).


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