Advantech UNO-3082, Руководство пользователя

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UNO-3084 User Manual 18
2.5.2 Isolated Inputs
Each of isolated digital input channels accepts 0 ~ 50 VDC voltage inputs,
and accepts bi-directional input. The voltage range is -3 ~ 3 VDC for logic
0 (low), -50 ~ -10 VDC and 10 ~ 50 VDC for logic 1 (high). It means that
you can apply positive or negative voltage to an isolated input pin (Vin).
All channels share two common pins (I.GND). Figure 2.8 shows how to
connect an external input source to an UNO-3084 isolated input channel.
Please note that DI0 and DI2 may be configured as gate control pins of
Counter 0 and Counter 1; While DI1 and DI3 may be configured as input
pins of Counter 0 and Counter 1.
Figure 2.5: Digital Input Wet Contact Diagram
2.5.3 Interrupt Function of the DI Signals
DI0 and DI1 can be used to generate hardware interrupts. Users can setup
the configuration of them by programming the interrupt control register.
The channels are connected to the interrupt circuitry. Users can disable/
enable interrupt function, select trigger type or latch the port data by set-
ting the Interrupt Control Register of the UNO-3084. When the interrupt
request signals occur, then the software will service these interrupt
requests by ISR (Interrupt Service Routine). The multiple interrupt
sources provide the card with more capability and flexibility.