Advantech PCI-1752, Quick Start Manual

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Chapter 3
– 27 – PCI-1752/54/56 User’s Manual
Advantech Co., Ltd.
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3.3 Isolated Digital Input Connections
The PCI-1754 has 64 isolated digital input channels designated
IDI00~IDI63, and PCI-1756 has 32 isolated digital input channels
designated IDI00~IDI31.
Interrupt function of the DI signals
There are 4 channels (IDI00, IDI16, IDI32 and IDI48) in PCI-1754 and 2
channels (IDI00 and IDI16) in PCI-1756 can be used to generate
hardware interrupts. A user can setup the configuration of interrupts
by programing the interrupt control register. For detailed information,
please refer to
Section 4.1 Interrupt Function.
Isolated Inputs
Each of isolated digital input channel accepts 10~50 V
DC
voltage
inputs, and accept bi-directional input. It means that you can apply
positive or negative voltage to an isolated input pin (V
in
). Every 16
input channels share one common pins. Figure 3-7 shows how to
connect an external input source to one of the card’s isolated input
channels
Fig. 3-7 Isolated digital input connection
PC 5V
IDI channels
Internal External
Protection
Circuit
Bi-direction
diode
S Vin
(COM)