Contec DIO-1616T-LPE, Руководство пользователя

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3. External Connection
DIO-1616T-LPE
31
Output Circuit
Output Circuit
External device
Output pin
Vcc
10k Ω
GND GND
Un-connected
Board
+5V output
Signal
commmon
Vcc
74LS07
(Open-collector)
* Output pin represent output signals.
Figure 3.5. Output Circuit
The output circuit of interface is illustrated in Figure 3.5.
Signal outputs are open-collector outputs; individual output signals are sent to the external device as
active low signals. Note that each signal output must be pulled up at the external device as it is not pulled
up internally.
CAUTION
When the PC is turned on, all output are reset to OFF.
Connection to the LED
O-20 (CN1 : 48 pin)
LED
2k Ω
Vcc (CN1 : 39 pin)
Bo
ar
d s
id
e
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 3.6. An Example to use Output O-00