PCI-6023E maximum working voltage2

Thanks Mr. Alan A
I am "434343" memeber.
I recive your response to my question about "Max input voltage of PCI-6023E" .But I have some questions.
According to the "Data Acquistion Specification- a Glossary by Richard House" ( Application Note 092):
"Maximum Working Voltage (signal+common mode)= the highest voltage level that can be input to board without saturating the input."
And according to your response:
"measuring a signal with higher common mode voltage than that(11V) might not accurate"
But in may experiment with a potentiometer (floating differntial source with (-)13.5V and (+) 5to22V),I could successfully measure the signal without saturating and without error (Max error is about +/- 0.02 volt)!!
I think that the maximum working voltage of PCI-6023E is greater then 11 volt??!!
or my measurement has a little error.
I think that I don't need to use a signal conditioning circuit.
Please Help me.
Thans again.
Edward Hb.

Please see this thread.
-Alan A.

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I have a PCI-6023E and I want to generate a continous pulse train with a digital output line, and I need to know the maximum frequency for this pulse train that I can generate.
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Hi Anacelia,
You should not realy on this answer without verifying with NI first. So here goes.
Page 347 of the catalog indicates the supported data transfer mode is "programed I/O". This indicates that each line state change must be initiated by an operation of the controlling software. Therefore, the upper frequency limit is determined by how often the code that sets or resets the line runs.
So, the upper limit is determined by the software and the environment it is running in. If you are woring in Windows environment, and your machine is faster than about 400 Mhz then there are two factors to concider when answering your question. How fast does the code run, and how deterministic is it.
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Alternative to PCI-6023E + PCI-6602

Hello,
I am already using a system to acquire 16 analog inputs data (at 50Hz) and 100Hz PWM signals (counters) and to send 100Hz PWM signals to external devices. Because it deals with 12 concurrent counters I bought 2 x PCI-6602 counter boards on top of a PCI-6023E for the 16 analog inputs (through a SC2345 box). This works all well.
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As you are an existing DAQ user, you will not be able to reuse your existing code. The cRIO platform uses the NI-RIO driver which is using some different program logic than the NI-DAQmx driver.
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NI-DAQmx: Correlated Digital I/O with NI CompactDAQ and LabVIEW
Can I Use Different Sample Clocks for Correlated DI and DO?
Some examples exist:
CompactDAQ - Generating More Than 2 Pulse Trains
NI-DAQmx: Digital Channel Pulse Width Modulation (PWM)
This info should already help you make a selection.
But please contact you local National Instruments office if you need more information.
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Best regards,
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http://www.ni.com/ask
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Dimentia,
I would need confirmation on what you want to do:
1) I want to monitor 2 analog DC signals
This means that you will have one Analog Input operation monitoring two channels. Please confirm.
2) single point measurements, not a waveform
Ok, no buffers.
3) I want to use the digital triggers to start the acquisition, 1 trigger for 1 AI
This would mean that a single digital pulse or edge on a single line would start your 2-channel analog input operation. Please confirm.
4) the measurements need to be made at 1Hz, maybe slower.
Hardware-timed or software-timed? 1 Hz could be easily implemented with software timing. But the triggering could force you to use hardware timing. It will not be a problem but it would be good to know.
5) Is
this possible with the PCI-6023E?
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6) I have a total of 6 triggers and 6 AI.
This last phrase is what really confuses me and seems to contradict the previous sentences. Does this mean that you will want to perform 6 independent Analog Input operations, with its own triggers (one each)? Will every Analog Input operation have 2 channels?
I'll clarify why this is important:
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PCI-6023E maximum working voltage2

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