National Instruments NI USB-9421 用户手册

© National Instruments Corporation

Threaded inserts are located in the NI USB-9421 for mounting it to a panel. 
Refer to Figure 6 for dimensions.

Figure 6.  Module Dimensions in Millimeters (Inches)

Plug one end of the USB cable into the NI USB-9421 and the other end into 
an available USB port on the computer. Refer to the NI-DAQmx for USB 
Devices Getting Started Guide that shipped with your device, and is also 
accessible from Start»All Programs»National Instruments»NI-DAQ, 
for more information.

The NI USB-9421 device has a green LED next to the USB connector. The 
LED indicator indicates device status, as listed in Table 1. When the device 
is connected to a USB port, the LED blinks steadily to indicate that the 
device is initialized and is receiving power from the connection.

If the LED is not blinking, it may mean that the device is not initialized or 
the computer is in standby mode. In order for the device to be recognized, 
the device must be connected to a computer that has NI-DAQmx installed 
on it. If your device is not blinking, make sure your computer has the latest 
version of NI-DAQmx installed on it, and the computer is not in standby 
mode.

Threaded Insert
M3 x 0.5
8.5 mm (0.34 in.) Max Depth

72.2 mm
(2.84 in.)

85.7 mm
(3.37 in.)

76.1 mm
(3.00 in.)