©
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. Figure 3 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, 0–5 V, 0–10 V,
±
60 mV,
±
300 mV,
±
1 V,
±
5 V, and
±
10 V.
Figure 4 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
V
IN
V
SUP
COM
I
IN
V
C
16-Bit
Isolated ADC
Filter
Filter
V
SUP
V
IN
V
C
To Analog
Input Circuitry
To Next Channel
>
100 M
Ω
Input
Impedance
COM
[c]FP-AI-110
Voltage
Source
+
–
I
IN
