Otto Von Bismark
Member
So I ran into something today that surprised and confused me. While troubleshooting a DC circuit I normally put one lead on a ground and probe areas to follow a 24V signal around. Red flags started waving as I was only able to find 10.5V anywhere I searched.
I followed it all the way back to the DC power supply. 10.5V from the positive to ground. However, 24V from positive to negative. I then checked, and the DC common is indeed NOT connected to ground.
I checked another panel that performs the identical task with an identical circuit. It is also the same, no path to ground. Check a few other panels made by the same company that does different tasks, and they are all connected to ground.
Is there any right or wrong about this??
I followed it all the way back to the DC power supply. 10.5V from the positive to ground. However, 24V from positive to negative. I then checked, and the DC common is indeed NOT connected to ground.
I checked another panel that performs the identical task with an identical circuit. It is also the same, no path to ground. Check a few other panels made by the same company that does different tasks, and they are all connected to ground.
Is there any right or wrong about this??