© 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 ESeries DAQ device accounts for the
voltage scaling effect of the SCC-AIXX. Otherwise, since the voltage
measurement from the ESeries DAQ device is scaled by the gain given in
Table1-1, you must divide the voltage reading returned by the ESeries
DAQ device by this gain to get the correct input voltage.
SpecificationsThese ratings are typical at 25 °C unless otherwise stated.
Input Characteristics
Number of input channels......................2 NRSE
Isolation..................................................Bank isolation (isolation
permodule)1
Input/output signal range, gain,
and bandwidth........................................Refer to Table 1-1
Input impedance
SCC-AI01, SCC-AI02.................... 1 MΩ
All others.........................................100 MΩ
Gain error...............................................4.5% max (trimmable to zero)
Gain stability..........................................150 PPM/°C
Offset error.............................................40 mV max (RTI2)
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,
referto the Co nnecting the Input Signals section.
2 This specification is calculated relative to the input r ange of the module.