Portable, Modular Signal Conditioning Modules
NI SCC-ACC01 Accelerometer Input
Specifications
SCC-ACC01
Analog Input
Number of input channels .................. 1 differential
Input range.......................................... ±5 VAC (fixed gain of 2)
Input coupling ..................................... AC
-3 dB cutoff frequency.................... 0.8 Hz
Filter type ............................................ Lowpass 3-pole Bessel
-3 dB cutoff frequency.................... 19 kHz
Passband flatness............................... ±0.3 dB, 10 Hz to 5 kHz
±1 dB, 5 Hz to 10 kHz
Maximum working voltage
(signal + common mode) ................ Each input should remain within
±12 V of ground
Overvoltage protection ....................... ±40 VAC + DC (powered on
or off)
Input impedance ................................. 5 MΩ in series with 0.39 µF
(powered on or off)
Model
SCC-ACC01
Channel
1
Description
Accelerometer input
Part Number
777459-19
The National Instruments SCC-ACC01 is a single-channel module that
accepts Integrated Electronic Piezoelectric (IEPE) compatible sensors
such as accelerometers and microphones. The NI SCC-ACC01 has an
amplifier with a gain of two, a 0.8 Hz highpass filter, and a 19 kHz
3-pole Bessel lowpass filter. The maximum input range is ±5 V. In
addition, this module has a 4 mA current source to power an
accelerometer or microphone.
When you install the SCC-ACC01 into the SC-2345, the carrier routes
the single output voltage to one input channel of the multifunction DAQ
device, channel x, where x is 0 through 7. For example, if installed into
the J1 socket of the SC-2345, the output voltage is routed to input
channel 0 of the DAQ device.
System noise....................................... 130 µVrms (referred to input)
Transfer Characteristics
Gain ....................................................
2
Gain error ............................................ ±1ꢀ
Gain-error temperature coefficient..... ±10 ppm/°C
Offset error.......................................... ±3 mV (referred to input)
Offset-error temperature coefficient.. ±1.± µV/°C
Nonlinearity......................................... 10 ppm of full scale
Recommended warm-up time............. 5 minutes
Amplifier Characteristics
CMRR .................................................. 80 dB at ±0 Hz
Output range ....................................... ±10 V
Excitation
Number of channels............................
1
Constant-current source ..................... 4 mA
Maximum voltage level
without losing regulation ............... 24 V
Drift .................................................... ±127 ppm/°C
Environment
Operating temperature ....................... 0 to 50 °C
Relative humidity ................................ 5 to 90ꢀ noncondensing
Power Requirements
Analog................................................. 89 mW
Digital.................................................. 420 mW
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NI [ National Instruments ]
