Chapter 3
I/O Information
©
National Instruments Corporation
3-9
Universal Serial Bus
Figure 3-6 shows the location and pinouts for the Universal Serial Bus
(USB) connectors on the NI PXI-8101/8102. Table 3-7 lists and describes
the USB connector signals.
Figure 3-6.
USB Connector Location and Pinout
Note
Install a noise-suppression ferrite (included in your shipping kit) around all attached
external USB cables to ensure that your device meets all EMC standards applicable to your
country. Install the ferrite so that each USB cable loops through the ferrite as shown in
Figure 3-7. The ferrite should be installed so that it is approximately 50–75 mm (2–3 in.)
from the end of the cable that plugs into the controller. The ferrite should accommodate
from 2–4 USB cables depending on cable diameter.
Table 3-7.
USB Connector Signals
Pin
Signal Name
Signal Description
1
VCC
Cable Power (+5 V)
2
D–
USB Data –
3
D+
USB Data +
4
GND
Ground
USB
4
1
NI PXI-8101
Embedded Controller
