PCI2307 Data Acquisition
Chapter 3 Connection Ways for Input and Output
3.1 Input Principle and wiring
DI0 ~ DI15 input principles are the same, the following description the DI0’s principle, the others are the same.
DI0 is the input signal. The following is the working principle of DI0: when DI0 is low-level, there is no voltage
difference between the 1 and 2 pin (than is, correspond with the DI0 and DG0) of the optocoupler U3, no internal
current, therefore the light-emitting diode is non-luminous, the internal dynatron is not on, in other words, the 3-pin and
4-pin are not connected together, the 3-pin output signal is low-level. When DI0 is high-level, the result is contrary to
above.
DI connection as follows
switch signal
DI0
DI15
DI7
DI8
DG0
switch device
DG1
switch device
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