I posted this in the wrong forum last time so I will ty here next. We are getting analog voltage changes in Labview on several different inputs(NI 9381). It happens when we activate the NI 9481 relay module with a 24V DC signal to power a solenoid. Don't understand why this is happens or why it shows on three different inputs in LabVIEW but not when testing the points with a meter. The 24V is only sent from power supply through relay to solenoid. The inputs are all 4-20 mA signals converted to 1-5V by a 250 ohm resistor across the ckt. The inputs come from a LVDT, extensometer, and a load cell. We had to convert the signals to make them readable by the 9381 module that we already had.
