National Instruments USB-621 Series User Manual

Index
© National Instruments Corporation I-5 NI USB-621x User Manual
USB-6212/6216, 6-4
block diagram, 6-5
circuitry, 6-5
connecting signals, 6-6
getting started with applications in
software, 6-7
I/O protection, 6-5
programmable power-up states, 6-6
static DIO, 6-5
DIN rail mounting kit, 1-6
documentation
conventions used in manual, xiii
NI resources, C-1
related documentation, xiv
double-buffered acquisition, 4-9
drivers (NI resources), C-1
duplicate count prevention, 8-37
enabling in NI-DAQmx, 8-39
example, 8-37
prevention example, 8-38
E
earth ground, connecting, 3-4
edge counting, 8-2
buffered, 8-3
on-demand, 8-2
sample clock, 8-3
single point, 8-2
edge-separation measurement
buffered two-signal, 8-20
single two-signal, 8-20
enabling duplicate count prevention in
NI-DAQmx, 8-39
encoders, quadrature, 8-16
encoding
X1, 8-16
X2, 8-16
X4, 8-17
equivalent time sampling, 8-26
examples (NI resources), C-1
exporting timing output signals using PFI
terminals, 7-3
F
features, counter, 8-34
field wiring considerations, 4-10
filters
counter, 8-35
PFI, 7-4
finite pulse train timing generation, 8-24
floating signal sources
connecting, 4-25
description, 4-25
using in differential mode, 4-27
using in non-referenced single-ended
mode, 4-30
using in referenced single-ended
mode, 4-31
when to use in differential mode, 4-25
when to use in non-referenced
single-ended mode, 4-26
when to use in referenced single-ended
mode, 4-25
FREQ OUT signal, 8-31
frequency
division, 8-26
generation, 8-25
generator, 8-25
measurement, 8-10
Frequency Output signal, 8-31
front panel
USB-6212/6216, A-13
USB-6218, A-21
fuse replacement (USB devices), 3-4

National Instruments USB-621 Series Specifications

General

Brand	National Instruments
Model	USB-621 Series
Category	Measuring Instruments
Language	English