National Instruments NI 9215 - Manual (Page 13)

© National Instruments Corp. 13 NI 9215 Operating Instructions and Specifications
Connecting Single-Ended Voltage Signals to the
NI 9215
To connect single-ended voltage signals to the NI 9215 with screw
terminal, you must also connect the ground signal to the COM
terminal to keep the common-mode voltage in the specified range,
as shown in Figure 6. For more information about the
common-mode voltage range, refer to the
Specifications section.
Figure 6. Connecting a Single-Ended Voltage Signal to the
NI 9215 with Screw Terminal
+
–
AI+
AI–
COM
Voltage
Source
NI 9215 with
Screw Terminal