Mesa 7i76eu gpio pins not working

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1 year 2 months ago #333265 by LeonDolnicar
Hello,

I am using Mesa 7i76eu card to operate my 3 axis CNC mill. I connected the stepper motors and they work, I can move them with linuxCNC. Now I tried to connect PNP proximity sensors to use as homing switches, but they are not working. At first I was also getting an error when starting linuxCNC, but i noticed that is because W1 jumper fell out while wiring. I set the W1 jumper back to its original left position but the pins are still not working. I also noticed that i have a CR11 LED light turned on indicating field i/o fault. Does anyone have an idea what could be the problem.

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1 year 2 months ago - 1 year 2 months ago #333266 by jimmyrig
Had the same issue, need to wire the "orange block" so that your inputs and outputs have power. You should see a yellow light only with only Ethernet or 5v power..... and a red or green light with field power.

I think it's just the bottom one on that orange block that needs 24v and the top one needs ground but that's from memory.... please check the manual
Last edit: 1 year 2 months ago by jimmyrig.

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1 year 2 months ago #333292 by nichtAlex
Do you have power connected to the orange TB1 header? The Jumper W1 connects VIN to VField but you still need to supply power to VField/VIN and GND. My 7i76eu is powered entirely by 24V going to both TB1 Pin 5 / Pin 8 for field voltage and TB3 Pin 21/ Pin 24 for logic power. My PNP sensors work flawlessly although it took me some time to figure out how to set the inputs to sinking/sourcing.

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1 year 2 months ago #333307 by rodw
This is using the 7i76e but more or less the same

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1 year 2 months ago #333324 by LeonDolnicar
Hey thanks for such a speedy replys i had the orange block wired wrong.

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