DAQ 6533 question

HI, all:
I have a question on DAQ Card 6533.
My peripheral device need a 'ACK' signal to start the transferring of data
into the 6533, but from the NI Website, I know that the 6533 can't generate
the 'ACK' signal at the beginning, so we have to use another DIO Line to
provide this pulse. My question is that how we can connect two outputs of
the 6533 together, both connect to the 'ACK' pin of the peripheral device,
will it cause some problem?
Thanks,
Guohua

Guohua
The 6533 has the "Wired-Or" ability. You can find more info about this in the 6533 user manual in chapter two.
Here is a brief description about wired-or and how to program it.
http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/8072d2b1f4687276862564d1006ad789?OpenDocument
Brian

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If you can do it in Measurement and Automation Explorer you can do it with the DAQ Assistant. The only real limitation is hardware, so as long as your board supports what you are trying to do then you can do it with the DAQ Assistant.
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Im using the DAQ assist to look at counting input on my dev1 ctr3 line that goes to my counter/timer board.
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I have a pci DIO-32HS card, which I have wired (using a SCB-68) such that there is a binary number coming in as the input lines for port A, and I also have a strobe signal as an input. I have two questions:
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I have been trying to get this to work and still cannot. Is it possible for you to help me with the specific settings that I need to have in the vi? I obviously need to use an external clock, and the clock is asynchronus. I also set it up for the correct device and port numbers, and I know the card works because I have tested/configured it in MAX. However whenever I run the vi, and then apply power to the strobe line (connected to REQ1 because I am trying to read port 0/A) nothing happens the vi still sits there. Any help?
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When I was setting up my USB 6210 I hit the run button to see what my voltage values were. Without doing anything to my DAQ assistant or touching the DAQ, the voltage inputs do this. Any ideas as to what may be causing this?

My current VI is nothing but a DAQ. At one point I will have the voltage input that is in the screenshot that varies by 20+ mV and I attached a voltmeter to confirm. But then at any instant all of the inputs drop down and hover around 1.5 mV. When the inputs are at the top values the inputs float around +/- 2mV so I know that something is wrong when I have all of them drop down to 1.5 mV at the same time and they all stay there until randomly they go back up to the higher values. Let me know if you need more explaination.

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Hi:
I need to syncronize AO and DO on a DAQ device.
I am thinking about USB-63XX series (for example USB-6341.), which has clocked DO, and probably cheaper than PCI series.
I have checked this example : http://digital.ni.com/public.nsf/allkb/EBD603683446EC13862575B3006A63A2 , which makes DO's clock to be AO's sampling clock.
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Solved!
Go to Solution.

Hi js777,
You are referring to sample clock synchronisation as mentioned in the article in your post. This type of synchronisation is supported on most types of DAQ devices. Please refer to the following links for a list of the NI DAQ models that support this form of synchronisation:
http://zone.ni.com/reference/en-XX/help/370466V-01/mxdevconsid/synchronmxsc/
http://zone.ni.com/reference/en-XX/help/370466V-01/mxdevconsid/synchrone/
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DAQ of low voltag signal

Hello,
as I´m quite new to LabView and DAQ this question is hopefully easy to answer.
I´m trying to read a voltage signal from a device referring to a temperature ( 10mV = 1°C). When reading the voltage with my DAQ-Card with a rate of 1000 Hz, I see the voltage I expect (300 mV) and peaks with 2,5 V and above 10 V. When I connect to a oscilloscope I can´t see those peaks, but just the right voltage. My question is if this is a problem arising from the small voltage? Does my Card internally amplify the voltage? Do I need to amplify the signal before connecting to the card?
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It should be quite easy for the DAQ-Card to read a 300mV signal at a sampling rate of 1kHz.
I can't explain why you are seeing peaks of "2.5V and above 10V" - this sounds quite wrong - in fact most DAQ-Cards are not even capable of directly measuring anything greater then 10V.
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Attachments:
demo_nolvl.vi ‏27 KB

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