National Instruments USB-621 Series User Manual page 205

Index
combicon, 2-4
desktop use, 1-6
device security, 1-8
DIN rail mounting kit, 1-6
fuse replacement, 3-4
information, A-1
labeling, 1-3
LED, 3-6
panel mounting, 1-7
signal labels, 1-3
signal wire management, 1-5
specifications, xviii
stacking, 1-6
USB cable strain relief, 1-4
using low impedance sources, 4-6
using PFI terminals
as static digital I/Os, 7-3
as timing input signals, 7-2
to export timing output signals, 7-3
using short high-quality cabling, 4-6
W
waveform generation signals, 5-5
Web resources, C-1
X
X1 encoding, 8-16
X2 encoding, 8-16
X4 encoding, 8-17
NI USB-621x User Manual I-12 ni.com