3. Connection and Installation
44
AIO-121602LN-USB, AIO-120802LN-USB
Connecting I/O Signals
The following sections show examples of how to connect digital I/O signals.
All the I/O signals are TTL level, and input or output can be set in 8 bit unit by software.
I/O Circuit
Figure 3.22. I/O Circuit
Example of Connection
When switch is "ON", the corresponding bit is "0". When switch is "OFF" in contrast, the corresponding bit is "1".
When "1" is output to a relevant bit, the corresponding LED comes on. When "0" is output to the bit, in contrast, the
LED goes out.
Figure 3.23. Connection Example Using DIO00 for Input and DIO08 for Output
Take care not to short the outputs to digital ground as this may cause a fault.
10k
Ω
Vcc
Unit
GND
GND
INPUT/OUTPUT
External circuit
74LV245
2k
Ω
DIO00
Switch
DGND
DGND
LED
DIO08
U
ni
t s
id
e
CAUTION
Содержание AIO-120802LN-USB
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