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ni.com
Chapter 1
Getting Started with the cDAQ Controller
Caution
Do
not
hot-swap VGA devices while the cDAQ controller is in a
hazardous location or connected to high voltages.
USB Ports
The cDAQ controller supports common USB mass-storage devices such as USB Flash drives
and USB-to-IDE adapters formatted with FAT16 and FAT32 file systems. LabVIEW usually
maps USB devices to the
U:
,
V:
,
W:
, or
X:
drive, starting with the
U:
drive if it is available.
You can also use these ports to connect a computer keyboard and mouse for cDAQ-9138/9139
for Windows programming. Go to
and enter Info Code
exswh5
for up-to-date
information about supported NI devices for the cDAQ controller.
Note
For optimal performance, NI recommends that you use the upper two USB
ports for high-throughput USB peripherals, such as mass storage devices or
expansion I/O controller.
Go to
and enter Info Code
exyerk
for information about best practices for data
logging performance with the NI cDAQ-9138/9139.
Refer to Figure 1-1 for the location of the four USB ports on the cDAQ controller. Refer to
Table 1-4 for USB pin locations and signal descriptions.
Caution
Do
not
hot-swap USB devices while the cDAQ controller is in a
hazardous location or connected to high voltages.
Ethernet Ports
The cDAQ controller has two tri-speed RJ-45 Ethernet ports, shown in Figure 1-1.
Refer to Figure 1-18 for Ethernet pin locations and signal descriptions. The Ethernet signal
names are listed as Fast Ethernet signal name, RX/TX +/-, and then Gigabit Ethernet signal
name, (RX/TX_
x
+/-).
Table 1-4.
USB Port Pin Locations
Pinout
Pin
Signal Name
Signal Description
1
VCC
Cable power (+5 V)
2
D-
USB data-
3
D+
USB data+
4
GND
Ground
Pin 1
Pin 4