Connecting Triaxial Accelerometer with PXIe-4339: Common Wire and AI- Input

[Nabby]

My lab uses a PXIe4339 and RM-4339 terminal block. I'm hooking up a triaxial accelerometer to the system. The accelerometer is being powered by an external power source and I'm routing the signal into the DAQ.

Now, the accel has 6 wires: V+, V-, X, Y, Z, and Common (with X,Y,Z being accelerations along those axes). I've typically connected Common to  ground in other DAQ systems but I don't have that option in this system.

Is it fine to split the common and plug it into the AI- of the selected XYZ channels? Or should I ground it first?

[santo_13]

Did you purchase the 4339 for the triaxial accelerometer, or you already had it and plan to reuse it for the accelerometer?

I ask this because the 4339 is designed for bridge circuits like load cells, pressure sensors, etc., where the signal changes in resistance.

Do you plan to use the accelerometer dynamically (i.e., focus on the frequency content) or the static (i.e., focus on the absolute value along the axes)?