Справочник Пользователя для National Instruments USB-9221

© National Instruments Corporation

The USB-9201/9221 provides connections for eight analog input channels. 
The USB-9201/9221 with screw terminal has a 10-terminal, detachable 
high voltage screw-terminal backshell. The USB-9201/9221 with DSUB 
has a 25-pin DSUB connector.

Each channel has a terminal or pin, AI, to which you can connect a voltage 
signal. The USB-9201/9221 also has a common terminal or pin, COM, that 
is internally connected to the isolated ground reference of the module. 
Refer to Table 2 for the terminal assignments of the USB-9201/9221 with 
screw terminal. Refer to Figure 7 for the pin assignments of the 
USB-9201/9221 with DSUB.

The high voltage screw terminal backshell must be installed when using 

hazardous voltages (>42.4 V

pk

, 60 VDC).

Double-blink

Connected to USB full speed port. Device 
performance might be affected. Refer to the 

 section for more information.

Quadruple-blink

Device error. Refer to 

ni.com/support

.

Table 1.  LED State/Device Status (Continued)