National Instruments NI USB-9234 - Manual (Page 17)

© National Instruments Corporation 17 NI USB-9234 User Guide and Specifications
AC cutoff frequency response
Input range ............................................. ±5 V
AC voltage full-scale range
Minimum ........................................ ±5 V
pk
Typical ............................................ ±5.1 V
pk
Maximum........................................ ±5.2 V
pk
Common-mode voltage
(AI– to earth ground) ............................. ±2 V max
IEPE excitation current (software-selectable on/off)
Minimum ........................................ 2.0 mA
Typical ............................................ 2.1 mA
Power-on glitch ...................................... 90 mA for 10 ms
IEPE compliance voltage ....................... 19 V max
If you are using an IEPE sensor, use the following equation to make sure
that your configuration meets the IEPE compliance voltage range.
must be 0 to 19
where V
common-mode
is the common-mode voltage of the
NI USB-9234,
V
bias
is the bias voltage of the IEPE sensor,
V
full-scale
is the full-scale voltage of IEPE sensor
10 4
0.5
0.0
–0.5
–1.0
3 2 1 0 9 8 7 6 5
Gain (dB)
Frequency (Hz)
V
common mode –
V
bias
V
full scale –
+ +