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Output more than 10 volts using PCI-6704

I need to output 20+ volts using a PCI-6704 card. Since each AO can only provide up to 10 volts, can I cascade some AO channels to get the voltage I need?

Message Edited by Mpv78 on 06-09-2006 05:11 PM

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Hi Mpv-
No, you can not cascade the outputs of your PCI-6704 card.  The outputs are not isolated from one another or from the chassis ground, so you would effectively be shorting your PC ground to a 10V output (bad idea).  Since the PCI-6704 is a static update module, depending on the channel count and form factor requirements you may be able to use the PXI-4110.  Otherwise, you will need to add some external amplification to achieve outputs greater than 10V.
Hopefully this helps-
Tom W
National Instruments
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OK. Thanks a lot for the feedback.
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The analog output more than + - 10 V is restricted on the most boards.So I think U have to use external Amplifier (op amp 741).


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