Size of the analog input signal

Hi,
very simple q how to protect my DAQ card from overvoltage. i mean, i produce some signal in my vi and i want to reduce it to max. say it 30V. how can i do this?
thanx in advance
vedran

Hi vedran,
I didn´t understand your question. Do you want to measure voltage and protect your card against the overvoltage or do you produce a signal with your DAQ card? Please tell me exactly what you want to do.
PatrickB
National Instruments Germany

Similar Messages

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    Hello Rafi,
    You may want to invest in a high voltage attenuator for signal conditioning prior to reading the signal.  The documents below may also be helpful:
    High Voltage and Isolated Measurements
    http://zone.ni.com/devzone/cda/tut/p/id/10693
    High-Voltage Measurements and Isolation
    http://zone.ni.com/devzone/cda/tut/p/id/3410
    Regards,
    Roman Sandoval | National Instruments | RF Systems Engineer

  • How can I syncronize the analog input?

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    This account is no longer active. Contact ShadesOfGray for current posts and information.

  • Can we acquire the Analog input and Digital Input at

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    Hi Chenchen,
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    If you need to move forward with both analog and digital acquisitions, then post a new quesion and give us details on the hardware you are using and the other details we will need to advise you.
    Trying to help,
    Ben
    Ben Rayner
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    www.DSAutomation.com
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  • When using the analog inputs and analog outputs of the PCI-7344, what is the conversion between the voltage entering the card to counts? Similarly, what is the conversion between counts to voltage at the output of the card?

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    Carole,
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  • Problem with the analog input acquisition in labview fpga 8.5.1 and CRIO

     Hello all,
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  • How do I use the analog input (ADC) to drive a motion profile in MAX

    We are trying to use an anolog input signal from a DAQ card to control the motion contol axis.  For now, we want the motor speed to follow a sinusoidal voltage waveform, and later on, we will be using a more complex velocity profile. 
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    Message Edited by Jochen on 10-02-2007 08:37 AM
    Attachments:
    gearing.jpg ‏162 KB

  • How to making smooth the analog input.

    I am trying to get an analog input from a device (torque meter). sending trough compactRIO and using NI 9025 analog module.
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    any suggestion what to use and what to do. please

    actually I am trying to get analog input from a torque meter, the input is voltage,
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    I am able to get the signal, but too much noise.
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    Attachments:
    measuring torque.pdf ‏165 KB

  • Covert analog input signal (NI 9203) to meaningful units

    I'm very new to LabVIEW and I wanted to do something that I thought was fairly simple. Using the NI 9203 analog input module I wanted to measure pressure using a sensor that has an output of 4-20 mA. Altough I get some signal at the end on my screen, it's not realy the pressure. How can I convert this to a meaningful signal? I also took a look at the exeple VI's in the module specific file, but I don't have a clue how to use them.
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    Don't forget to rate a good answer

  • What are the 4 analog inputs of my umi-7764 (on the analog input terminal block)

    I would like to known what are and how connect the 4 analog inputs of the anolog input terminal block of my umi-7764. I am french, so if you want to answer in french, it will be easier for me .

    Sébastien,
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    - Le point froid du signal sur "Analog Inout Ground"
    De plus si votre carte de contrôle d'axe intègre des entrées analogiques, vous pouvez configurer leur gamme dans MAX (Measurement & Automation Explorer) le range de ces voies (+/-10, +/-5, 0-5 et 0-10 V).
    (Comme l'UMI est un bloc générique, assurez vous bien que votre carte possède des entrées analogiques)
    Finalement, pour lire le niveau de tension sur ces entrées, il existe dans le driver NI-MOTION, la fonction "Read ADC".
    sur http://www.ni.com/manuals
    vous trouverez la documentation de votre matériel.
    A l'adresse ci dessous, vous trouverez de l'aide concernant la configuration de votre system motion dans max:
    http://zone.ni.com/devzone/conceptd.nsf/webmain/081957EE013C7A4586256B92007818E0?opendocument
    Raphael TILLET
    Ingénieu
    r Application
    NI FRANCE
    Cordialement,
    Raphael T

  • H215 Loses the analog video signal after a few minutes after start up.

    After Windows 7 is loaded and about 30 minutes to an hour of normal screen and computer usage, the display goes black and my Viewsonic monitor says that the analog signal is missing and then goes into power save mode. Why is this happening? And the only way to resume the use of the computer is to force shut down the tower and then to power it back on. Which then runs through the failed start because I had to force shut down the system due to the display losing its signal. Please assist in this matter. I just bought the system a few days ago and for it to be doing this is quite dissatisfying. Thanks.
    The system specs is:
    CPU: AX2 250
    RAM: 4GB
    HDD: 1 TB
    ODD: DVD-RW
    OS: WIN 7 HP
    D4RK51D3 G.F.X. LLC
    Engineering the 1337 way.

    Hello Oremus Productions,
    First of all, sorry for this frustrating issue. The first thing to check with OS X Mavericks or Yosemite is the permissions of your Adobe folders. Here is blog post to check out: Premiere Pro CC, CC 2014, or 2014.1 freezing on startup or crashing while working (Mac OS X 10.9, and later)
    The other thing I'm curious about is ProRes and if Premiere is handling it properly. Tell me, do you have Final Cut Pro 7, Final Cut Pro X, iMovie, or any of the Apple video products installed? Do you have any components in your Mac HD > Library > QuickTime?
    Thanks,
    Kevin

  • How to combine the analog input and analog output vi's

    Hi !
    I have a perfectly running triggered analog input acquisition vi. I have a seperate vi for analog output that's running perfectly too. Can someone tell me how to combine these two operations so that I could get a vi that does simulataneous AI and AO without missing triggers. I have tried all the different kinds of configurations suggested by NI support but nothing seems to work. Can someone help ?
    thanks,
    Shiva
    Attachments:
    dac_good.vi ‏77 KB
    adc_good_fw.vi ‏124 KB

    Shiva;
    I'm attaching a good Application Notes that shows how to synchronize multiple DAQ tasks, in Labview.
    Hope this helps.
    Filipe
    Attachments:
    Advanced_Sync_Techniques_for_DAQ.zip ‏166 KB

  • How can I measure the frequencies of two analog input signals simultaneously?

    Hi
    I have two AI signals, and I need to determine the frequencies of those signals. The frequencies range from 1-125Hz. I currently have a VI where I can sample one of the signals for 1 second (sampling at 300 Hz for 300 samples) and determine the frequency. 
    I need to read two signals at the same time and get both of the frequencies at the same time, but I can only figure out how to read them individually, so I can read one signal, then one second later I read the second one, then I read the first one again, then the sceond one, etc..  How can I read two signals simultaneously?
    Thanks
    Attachments:
    FreqMeas11.vi ‏41 KB
    FreqMeas11.PNG ‏18 KB

    "at same time", this depends on the hardware, you can do as has been previously stated just set up a 2 channel acquisition and you will get 2 sampled waveforms back.  Most hardware A/D as multiplexed and true simultaneous sampling is not done.  At 125Hz this is not an issue unless you are interested in very small phase changes between the samples.  just keep this in mind if you are expecting samples to be completly synchronized.
    Paul
    Paul Falkenstein
    Coleman Technologies Inc.
    CLA, CPI, AIA-Vision
    Labview 4.0- 2013, RT, Vision, FPGA

  • Would anyone know how to program the Labview code for the following: Recording an analog input signal for 100msec and then repeating this 100 times in order to finally have an averaged signal (waveform)​?

    I have added a vi, but it doesn't quite work. Would be very grateful if someone could help, thanks!
    Attachments:
    Average_0411041_2.vi ‏77 KB

    The attached VI collects 100 ms of data and does a rolling average. Since your sub-VI were not included I created this from scratch. There are comments in the code. I hope this is what you need.
    Dirk
    Attachments:
    rollingaverage110x100.vi ‏47 KB

  • Multiplexi​ng channels after the analog inputs of a DAQ Hardware

    Hi,
    I need to sample a 5KHz analog signal with 48 channels.
    It's needed all these channels simultaneos.
    I know there is not a DAQ hardwere at NI beyond 4 simultaneos channels.
    How could I or NI solve this problem? Have NI an hardware that could be applied?

    Greetings,
    You are correct in that there are no simultaneous sampling boards that have more than 4 channels. Performing truely simultaneous sampling will ensure that there is virtually no interchannel delay and that the phase relationship between each signal is retained. If you use a regular Multifunction Input/Output DAQ board and some sort of signal conditioning, like SCXI, to increase your channel count, you will be performing a multiplexed operation. However, in most cases the interchannel delay is on the order of microseconds. If this is still too much for your application then I'm affraid the only answer is to get multiple Simultaneous Sample boards. You would want to trigger each board's acquisition to start at the exact same time. In order to
    do this you could either use a PXI system or use PCI and leverage RTSI.
    However, even with this suggestion you should keep in mind that most PCs only have 5 PCI slots, which will limit you to 5 * 4 = 20 channels. If you went with a PXI system and used the PXI-1006 chassis, which has 18 slots, then you could fill it with 12 PXI simultaneous sample cards.
    PXI
    http://sine.ni.com/apps/we/nioc.vp?cid=1525〈=US
    NI PXI-1006
    http://sine.ni.com/apps/we/nioc.vp?cid=4889〈=US
    S Series Multifunction DAQ
    http://sine.ni.com/apps/we/nioc.vp?cid=10834〈=US
    Regards,
    Justin Britten
    Applications Engineer
    National Instruments

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