National Instruments Isolated Analog Input Modules SCC-AI14 - Manual (Page 11)

© National Instruments Corporation 11 SCC-AI Series Isolated Analog Input Modules
Scaling Voltage Measurements
If you configured the SCC-AIXX using MAX and you are using NI-DAQ,
the voltage reading you get from the E Series DAQ device accounts for the
voltage scaling effect of the SCC-AIXX. Otherwise, since the voltage
measurement from the E Series DAQ device is scaled by the gain given in
Table 1-1, you must divide the voltage reading returned by the E Series
DAQ device by this gain to get the correct input voltage.
Specifications
These ratings are typical at 25 °C unless otherwise stated.
Input Characteristics
Number of input channels ...................... 2 NRSE
Isolation.................................................. Bank isolation (isolation
per module) 1
Input/output signal range, gain,
and bandwidth ........................................ Refer to Table 1-1
Input impedance
SCC-AI01, SCC-AI02 .................... 1 M
Ω
All others......................................... 100 M
Ω
Gain error ............................................... 4.5% max (trimmable to zero)
Gain stability .......................................... 150 PPM/
°C
Offset error ............................................. 40 mV max (RTI 2 )
Offset stability........................................ 225
µV/°C
Nonlinearity ........................................... 0.0128% typ
0.0260% max
Common-mode rejection ratio ............... 100 dB typical at 60 Hz
Output slew rate,
dependent on BW (filtering) .................. 0.8 V/
µs max
1 The SCC-AIXX does not provide isolation between the two channels of the module. For more information on this topic,
refer to the
Connecting the Input Signals section.
2 This specification is calculated relative to the input range of the module.