The Industrial Raspberry Pi Forum

HI,
I have a system which has a number of modules (AIO, DIO and 2xMIO).
All of the sensors in one of the MIOs seem to be either reading 0 or 10700. I have noticed that 10700ish is the value when disconnected.
I have 4-20 sensors running through Intrinsically Safe barriers that are powered through 24V. The output is then sent to some 500ohm resistors to the inputs and ground.

Anyone know of a possible scenario where this might happen?
I am not on the ground, have some guys there testing.
It seems weird that all inputs are either 0 or 10700.
Could this be a weird grounding issue where the module has a ground connected to a positive source?

Hi mitchellday06, Yes, there is currently a known bug that causes unused inputs to fade. An update is already in preparation that will fix the software part so the IN LEDs won't blink red.
Please use wire jumpers between unused inputs to pull them to ground.
Take a look here: Commissioning RevPi MIO - FAQ

Thanks Dirk.
So the a flickering of 0 and 1 input for the sensors that are connected isn't a result of other unused inputs not being grounded? if so, I think we have two issues here.
e.g. If I have a sensor connected to input 1, and had all other inputs ungrounded, this would not affect the input 1 reading? It would just mean the other inputs read high (~10700)?

Yes, the other inputs are not affected by readings from one sensor. Could you please sketch your schematic / wiring so we can get a better understanding of your setup? Thanks!

Nicolai