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Dytran accelerometer compatibility with NI-9230

Can anyone confirm the compatibility of Dytran IEPE accelerometers, model 3097A2 for instance, with the NI-9230?  I am not sure about the compliance voltage listed for the accelerometer, +18 to 30 volts, matches the 22 volt minimum requirement for the NI-9230.

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Will work 🙂 (if not something is wrong)

IEPE sensors are powered by a constant current source (4mA in case of the 9230) and the output signal (+-5V in case of the 3097A2) 'sits' on a bias voltage of +11V to 13V resulting in an sensor output voltage of +6V to +18V  giving you 4V headroom to the 22V max @4mA of the 9230.

If you (try to) supply a IEPE sensor with a constant voltage source without current limit (20mA max, or what'S defined in the sensor datasheet) you will destroy the sensor!

 

The compliance voltage describe the maximum voltage that the current source  is or should be able to output while sourcing the specified current (4mA in your case).

 

Even if you choose a IEPE sensor with a -+10V span and Bias voltage is at 13V you can use that sensor but migth get a open or broken cable warning if the maximum acceleration (aka max output ) is reached... 

 

NI and all IEPE sensor suppliers (and wikipedia  and ...) provide more information on how IEPE sensors work.

Other naming is  ICP or deltatron or CCLD or ...   there are some minor differences since there is no official standard .. and sometimes you need something special ( longer cable or lower power supply or ..) .... so it's a good idea to check. 

Greetings from Germany
Henrik

LV since v3.1

“ground” is a convenient fantasy

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It seem Yes it will work

bhovhann
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