![background image](http://html2.mh-extra.com/html/national-instruments/ni-9215/ni-9215_getting-started_3412099011.webp)
Voltage
Source
+
–
AI+
AI–
COM
NI 9215 with
Screw/Spring
Terminal
COM
NI 9215
with BNC
AI+
AI–
+
–
Floating Differential Connections
1 M
Ω
Resistor
NI 9215 with
Screw/Spring
Terminal
AI+
AI–
COM
Voltage
Source
+
–
■
Connect the negative lead to COM through a 1 MΩ resistor to keep the signal
source within the common-mode voltage range.
■
The NI 9215 with screw terminal and the NI 9215 with spring terminal does
not read data accurately if the signal source is outside of the common-mode
voltage range.
NI 9215
with BNC
AI+
AI–
Voltage
Source
100 k
Ω
+
–
The NI 9215 with BNC has internal circuitry that maintains the common mode
voltage range.
© National Instruments
11
NI-9215 Getting Started
Содержание NI 9215
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