Contec AO-1604CI2-PCI, Руководство пользователя

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3. External Connection
40
AO-1604CI2-PCI
Input pin
+Common
Vcc Vcc
External power supply
+12V - +24VDC
External device
Plus common
Open-collector
output
Minus common
Board
Internal
circuit
Figure 3.8. Connection example with open-collector output (current sink type)
+Common
Vcc Vcc
+12V - +24VDC
Contact point
Board
External power supply
Internal
circuit
Input pin
Figure 3.9. Connection example with mechanical contact point
The relation of the data (internal logic) seen from the input signal and the PC side as an example of the
above figure is shown below.
Table 3.1. Relation between the input signal and the data (internal logic) seen from the PC side
Internal
logic
Contact
point
Input pin voltage
level
0 OFF High
1 ON Low
Reference
For the operation timings for control signal input, see “Timing of External Control Signals” in
Chapter 6 “Hardware”.