Problem with analog input SM331

Hello mehrdad;

The original thread dates from over 12 years ago; the original poster has left the forum. And out friend Wizard might not be expecting new questions in this discussion...

It looks like the original poster did not follow the wiring diagrams for his analog input module, and wired 24 VDC power to the module, who was not required. This provoqued wrong readings in various channels. This is what Wizard pointed out to the original poster  Upon removal of the offending power connections, the unit seems to have gone back to normal readings, and was luckily not damaged. 

What AI module are you working with, and what faulty readings do you observe in your channels?

Hope this helps,

Daniel Chartier