National Instruments cFP-Al-110, FP-Al-110 Taking Measurements with the [c]FP-AI-110

© National Instruments Corp. 5 FP-AI-110 and cFP-AI-110
Taking Measurements
with the [c]FP-AI-110
The [c]FP-AI-110 has eight single-ended input channels. All eight
channels share a common ground reference that is isolated from
other modules in the FieldPoint system. Figure3 shows the analog
input circuitry on one channel.
Figure 3. FP-AI-110 Analog Input Circuit
Measuring Voltage with the [c]FP-AI-110
The input ranges for voltage signals are 0–1 V, 0–5V, 0–10 V,
±60mV, ±300 mV, ±1V, ±5V, and ±10V.
Figure4 shows how to connect a voltage source without an
external power supply to one channel of the [c]FP-AI-110.
Figure 4. Voltage Source without External Power Supply
VIN
VSUP
COM
IIN
V
C
16-Bit
Isolated ADC
Filter
Filter
VSUP
VIN
VC
To Analog
Input Circuitry
To Next Channel
>100 MΩ
Input
Impedance
COM
[c]FP-AI-110
Voltage
Source
+
–
IIN