Jazz JZ20 R31 analog inputs

[Pawks666]

Hello,

 

I have a problem using analog voltage inputs (0 - 10V) with jazz.

 

When i connect one input (AN2 for example), the other input (AN3) also reads voltage which depends on AN2 input.

It's not the same value, but if AN3 is not connected, voltage read is about 80% of what AN2 reads.

 

When both inputs are connected, one affects the other and vice versa...

It's really significant effect, so i don't think it could be interference related.

 

Both inputs are also from the same power source and grounded.

 

Any ideas what could be wrong?

 

Thank you for help

 

Best regards,

 

Pawks

 

EDIT: I forgot to ground pin "n/p I16-I17", now it works fine. Sorry for that.