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Chapter 6
Digital I/O
©
National Instruments Corporation
6-7
Figure 6-4.
USB-6212/6216 Digital I/O Connections
Caution
Exceeding the maxim
u
m inp
u
t voltage ratings, which are listed in the
NI USB-621x Specifications
, can damage the DAQ device and the comp
u
ter. NI is
not
liable for any damage res
u
lting from s
u
ch signal connections.
Getting Started with DIO Applications in Software on USB-6212/6216
Devices
Yo
u
can
u
se the USB-6212/6216 device in the following digital I/O
applications:
•
Static digital inp
u
t
•
Static digital o
u
tp
u
t
Note
For more information abo
u
t programming digital I/O applications and triggers in
software, refer to the
NI-DAQmx Help
or the
LabVIEW Help
in version 8.0 or later.
+5 V
LED
TTL
S
ign
a
l
+5 V
S
witch
I/O Connector
D GND
U
S
B-6212/6216 Device
P0.<0..
3
>
P1.<0..
3
>
Digit
a
l
I
s
ol
a
tor
s
I
s
ol
a
tion
B
a
rrier
(U
S
B-6216
device
s
only)
When
us
ing
a
U
S
B-6216,
yo
u
m
us
t connect
D GND
a
nd/or AI GND
to the loc
a
l gro
u
nd
on yo
u
r
s
y
s
tem.