Contec PIO-16, Руководство пользователя

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3. External Connection
PIO-16/16RY(PCI)
31
Connecting Output Signals
Connect the output signals to a current-driven controlled device such as a relay or LED.
The connection requires an external power supply to feed currents.
The board controls turning on/off the current-driven controlled device using a digital value.
Output Circuit
External circuit
Output pin
Board
External
Power Supply
Output pin
Vcc
* Output Pin: O-xx
Semiconductor relay
Semiconductor relay
Load
Load
Output
common
Figure 3.7. Output Circuit
The output circuits of interface blocks of the board are illustrated in Figure 3.7.
The signal outputs are semiconductor relay outputs using a rated output current of up to 100 mA per
channel.
CAUTION
When the PC is turned on, all output are reset to OFF.
Connection to the LED
O-20 (CN1 : 21pin)
LED 5.1k
Ω
Output common (CN1 : 20pin)
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.
External
power supply
12 - 24 VDC
+
-
Bo
ar
d s
ide
Figure 3.8. An Example to use Output O-20