National Instruments DAQ 6527 User Manual
Page 41
Glossary
G-2
www.ni.com
C
C
Celsius
CAT I
installation category (overvoltage category) I—equipment for which
measures are taken to limit transient overvoltages to an appropriate low
level. Examples include signal-level, telecommunications, and electronic
equipment with transient overvoltages smaller than local-level mains
supplies.
cm
centimeters
CompactPCI
refers to the core specification defined by the PCI Industrial Computer
Manufacturer’s Group (PICMG)
D
DAQ
data acquisition—a system that uses the personal computer to collect,
measure, and generate electrical signals
DC
direct current
DIG+
positive data terminal
DIG–
negative data terminal
DIO
digital input/output
DMA
direct memory access—a method by which data can be transferred to or
from computer memory from or to a device or memory on the bus while the
processor does something else. DMA is the fastest method of transferring
data to or from computer memory.
G
GND
ground reference
H
Hz
hertz