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© National Instruments Corp. 17 NI 9215 Operating Instructions and Specifications
The NI 9215 with BNC has a resistor that ensures the input voltage
does not drift outside of the common-mode range.
Figure 9. Input Circuitry for One Channel on the NI 9215 with BNC
AI
+
AI
–
Isolated
ADC
NI 9215 with BNC
+
–
Instrumentation
Amplifier
100 kΩ
Overvoltage
Protection
Overvoltage
Protection