Generating 100 ms pulse of analog voltage output

[Soup2nuts]

Hello All, 

Is it possible to generate a 100 ms analog voltage output pulse in labview? The hardware I have is CDAQ 9171 and NI 9482 (Relay Module). 

The relay module has a switch rate of 1 second, so I think I am limited with the hardware capability. 

What would be the right hardware (Module) to use for this application ? Also, would daqassistant (Generate counter output signal) be sufficent with the right hardware? 

Thanks! 

[Kyle97330]

Where are you seeing the 1 second thing?

The manual for it says:

Relay release time.............................10 ms max
Relay operate time ............................15 ms max
Relay bounce time ............................3 ms

Alternatives would be the NI 9485 (also a relay, but solid state so the switching goes faster) or NI 9263 (self-powered).

Just how precise does the 100 ms need to be?  Would 90 or 110 be ok?

[Soup2nuts]

Hi Kyle, 

If the relay switch rate is 10 ms max, I should be able to work with NI 9482. 

100ms value is is not too flexible. A lower ms value might be acceptable but not higher. 

Also, I am hesitant to use delay functions to achieve this due to the inherent uncertainty in the output. 

Would would you suggest will be the right function to use for this application ? 

Generate counter output signal  ? or create CO output (time) channel vi ? 

Thanks! 

[natasftw]

Why are you trying to use a relay switch for an analog output instead of an analog output module?

[Soup2nuts]

I am kinda limited with hardware. A NI 9482 is what I have at hand. 

What hardware do you recommend for this application ? 

[JÞB]

a 9472

should do the job with an external voltage source of the correct value

[Soup2nuts]

Thanks Jeff. 

Looks like the 9472 has a switch rate of exactly what I need. 

Should I want to go with a lower switch rate (< 100ms), will a NI 9474 do the job ? 

Thanks! 

[JÞB]

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@Soup2nuts wrote:

Thanks Jeff. 

Looks like the 9472 has a switch rate of exactly what I need. 

Should I want to go with a lower switch rate (< 100ms), will a NI 9474 do the job ? 

Thanks! 

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That is a question for your local NI Sales Rep! they can speak with you directly for more information about your exact needs.