Using NI 9401 instead of 9472 for PWM

[fowlerd8]

Hello,

Hardware:

cDAQ 9172 Chassis

NI 9219 AI to collect temperatures from type-K thermocouple

NI9472 DO to generate PWM signals from duty cycle of PID loop

My goal of this project is to monitor and maintain a duct heating element.  I am using the PID toolkit to generate the DC for the PWM.  With the NI 9472, I am generating a PWM voltage output proportional to my exterior power supply.  However, if I used the NI 9401, an exterior power supply would be unnecessary thus making my life easier.  

Attached is my VI and jpeg of the VI.  What modifications would I need in order for the 9401 DO to function properly?  I am very new to LabView.

Thanks

[azp7]

Hi!

Is your program giving you some error?

Had you tried to use first an example to learn how to use that module?

[fowlerd8]

Hi azp7,

My program is able to run with no errors, controlling the relay as needed.  I am just interested in the 9401 because of the independence from an exterior power supply.  I had difficulty finding much info on the 9401, perhaps you have a link or two?

Thanks!

[azp7]

Ok, still not sure about your issue, but sure. The best you can do is to verify your requirements with the datasheet.

You can find it here: http://www.ni.com/pdf/manuals/374068a_02.pdf

[fowlerd8]

I wouldn't classify it as an issue, more so of an interest in using a different DAQ.