AI module reading data

Hello All. I have a 1794-IE8 that is connected to a Contrologix PLC. I have nothing connected to the input terminals on this unit yet it goes between 8,16, and 24 input values. I am assuming it is noise that I can't find the source to. I have swapped modules and bases yet the problem continues. When I connect an actual AI signal to the device, it doesn't read it. I have the module configured correctly but still no-go. Any advice would be greatly appreciated. Thank you.

Have you linked the commons togther and connected them to 0v ?

pal said:

Have you linked the commons togther and connected them to 0v ?

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Yes

Ground all unused inputs as well.
AB Analog Inputs seem to have issues if any are left floating.

rdrast said:

Ground all unused inputs as well.
AB Analog Inputs seem to have issues if any are left floating.

Click to expand...

Thank you