Справочник Пользователя для National Instruments USB-9221

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The high voltage screw terminal backshell must be installed when using 
hazardous voltages (>42.4 V

pk

, 60 VDC). Refer to Figure 8 while 

completing the following steps:

1.

Connect the leads to the screw terminal and secure with the strain 
relief. 

2.

Finish by snapping the backshell around the connector.

Figure 8.  High Voltage Screw Terminal Backshell

You can connect single-ended voltage signals to the USB-9201/9221. 
Connect the positive lead of the voltage signal to AI. Connect the ground 
signal to COM.

Figure 9.  Connecting a Single-Ended Voltage Signal to the USB-9201/9221

1

Strain Relief

1

COM

AI

Voltage

Source

USB-9201/9221

+

–