Digital output daq

Hi,
This should be very easy, but for some reason I'm having issues. All I want to do is have a switch control a digital output. I am using an NI 9742 Dsub (link) card, which should be capable of digital output.
Attached is my code, with a simulated card. When testing I switch the DAQ assistant properties to the real card.
Using this code, I cannot get a DC output at all, my scope just hovers around 100mV. Using other cards, I have the Analog I/O working just fine, but for some reason the digital output on this card isn't? Also, if you look at the card, there are 8 green LEDs towards the top. I believe each one specifies when an output is on. When I turn the switch on, the corresponding light does in fact light up, but I cannot measure a voltage? Is there some setting I'm missing?
Hopefully this makes sense. Thanks!
-secondary question: Once this works, how do I change the output range. The specs say 6V-30V output, but I do not see where to change this.
Solved!
Go to Solution.
Attachments:
digital output help.vi ‏42 KB

If you dig into the Operating Instructions, you'll notice that you have to supply an external power supply. The way this card works to by connecting the external supply to the output. You should also see this on the side of the module. NI's site doesn't have a good sideways shot, but it looks like a switch.
So basically, with no power supply you will get no voltage out. The output range is also adjusted by adjusting the external supply.
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Attachments:
DigitalContinuous2.JPG ‏198 KB

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Attachments:
Cont Write Dig Chan-Pipelined Sample Clock.vi ‏49 KB

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K-9.jpg ‏36 KB

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Solved!
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Hi Yann,
Wow, thank you so much for this example! I'm trying to take a look at it, but when I run it.. it responds with the following error message
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Solved!
Go to Solution.
Attachments:
DO example.vi ‏44 KB
schematic.png ‏16 KB

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Solved!
Go to Solution.

Hello,
Here is a link explaining the inputs of function:
http://zone.ni.com/reference/en-XX/help/370471W-01/daqmxcfunc/daqmxwritedigitalu32/
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Solved it. See attached vi.
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Route_RTSI_to_Source.vi ‏67 KB

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Trigger AI Task Off DO Edge.vi ‏32 KB

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Digital output daq

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