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Can I power two separate devices using one NI 9474 (Digital o/p module)

I have written a code to use port0/line0 of the NI 9474 to supply current to a Thermoelectric heater which I pulse on and off using LabVIEW. 

 

Now, I want to power one more thermoelectric heater and heat them both to two different temperatures (so their controls in LabVIEW will be different cases). 

 

When I connect it to another port0/line x or even to a different NI 9474 (I have an extra), I get power to only one heater and the other doesn't function.

 

I am connecting all my modules to a cDAQ-9178 (can hold 8 modules).

 

Is there a way around this?

 

 

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