Serial RS232 directly to a USB DAQ?

Hello,
I have a question regarding serial communication: is it possible to directly hook a device via RS232 serial to digital pins of a USB-6211 DAQ? (Or maybe even a USB-6008?)
If so, where should I wire the pins to?
If not, could you recommend me a not too expensive, yet functional RS232 to USB adapter which could work fine? (I am planning to interface a Datex capnometer or a Fresenius Pilot C infusion pump first, however if I could find a relatively well-priced multi-port adapter I would go on with both. BTW, can I include more NI-VISA queries in parallel in LabVIEW?)
Thanks
Engage! using LV2012
Solved!
Go to Solution.

The main difficulty is that I am not familiar with these devices. I thought it was not suitable because all the pages say that cables based on these chips are for 3v3 to 5v connections between an arduino and a pc, while there are some more expensive cables which do not mention uart or 3v3 connection.
Should I worry about this or can I go on with these chips?
Engage! using LV2012

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I am setting up a system to generate either a single square pulse or a train of square pulses using LabView, with controls to adjust the frequency, amplitude, number of pulses etc. I have had a lot of help from NI tech support setting up the actual VI itself which seems to be working fine, and outputting the pulses via a USB DAQ 6211 using a square waveform generator and the AO1 channel on the DAQ.
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Hi Shalini,
Apologies for taking a while to get back to you, I hope I can explain what it is that we need to create with the pulses. I understand what you mean about the existing pulses having a positive and negative on the graph - but we need the pulses to start from a resting voltage and the first pulse to be positive, then back to zero, then the second pulse to be negative then back to zero etc. This is to do with reversing the direction of the current between two electrodes to prevent build up of salts on one electrod from the current always passing in the same direction.
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Attachments:
Slide1.jpg ‏38 KB

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Hello!
I am new to labview. I was given the task of changing our SR400 gated photon counter from GPIB interface to serial RS232. I am not quite sure to go about this with the code I was given.
The sr_400 count VI writes parameters to the SR400 and then reads the data from it using the GPIB. What is the easiest way to change the VI so it uses serial RS232? Should I just removed the GPIB parts in SR400 A gate and Read and replace them with the example for RS232?
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Attachments:
sr_400 count.vi ‏19 KB
SR400 Read.vi ‏20 KB
SR400.LLB ‏132 KB

Do I need to add a configure serial port function for the write and read part or will one be enough?
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What is maximum read out speed of USB DAQ 6343

hello everyone,
we have new USB DAQ 6343.Its application note(or say characteristcs) says that it's sampling rate is 500K Sample/second.Now i need some clarification from you guys.I have to read digital data(serial or parallel). so plz tell me how much far I can go with this product for both ways.
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Solved!
Go to Solution.

Unfortunatly I can't get the spec online
Error
You are not authorized to view this document
but you should have get it with your device
However the datasheet is telling me something like 500kS/s aggregate (500kS/s / <number of channels read> ), but up to 1MS/s for digital input. However you need to get the data into your PC. If you read one 8 bit port @1MS/s the USB should be able to handle the datastream.
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Can I write directly to a USB virtual port ?

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At least one other install is also Win 7 running LV 2011 though that should have no effect. Am using the MS Word specific print functions to populate fields (bookmarks) in a word document (for a label) and sending it to the printer.
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Case closed for me at this point.
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"My only wish is that I am capable of learning each and every day until my last breath."

RS 232 TO USB DAQ

Hi,
Is is possible to sync. RS 232 with USB DAQ 6008? i have a GPS mouse and i am woundering whether i could, physically wire each individual ports of RS 232 (output port) with NI USB DAQ 6008 and read the data in labview. thankyou.
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Hi Lynn, thanks for the response. I'll try to answer all of your questions.
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Serial RS232 directly to a USB DAQ?

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