Hello,
I know there are a few threads on this subject already, but I wanted to ask some questions regarding how to drive a solid state relay using my NI USB6008 and a ULN2003A. I am a student, but do not have much familiarity with these kind of electronics so bare with me.
Basically, I would have 2 relays (control voltage 3-32VDC, 28mA @ 32V) to drive. Since this is too much current for the USB6008, I would have to use another device such as the ULN2003A, and some external power supply, correct? I found this diagram on the forums:
But I am a little confused on how the 12V power supply is connected. Would the 12V go to both the COM of the 2003A and to the positive terminal of the relay? Is the negative terminal of the relay then connected to the 2003A? Finally, are all the grounds tied into the USB 6008?
I just want to verify this setup will work with my relays.
Thank you