Advantech PCIE-1760 handleiding
Handleiding
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PCIE-1760 User Manual 8
2.1 Signal Connection and Pin Assignments
2.1.1 Isolated Digital Input Signal Connection
A digital input channel senses the state of the external sensor or switch, and passes
it through a galvanic isolator (opto-coupler) to the internal circuit. This prevents the
internal components and the host devices (e.g. PC) from damaging when such fault
conditions arise. The device supports both wet contact and dry contact configurations
for digital input signal connection, which can be configured by onboard jumpers for
each channel independently.
For wet contact configuration, an external voltage source is applied between the pos-
itive digital input (DI+) terminal and the negative digital input (DI−) terminal through a
switch as shown in Figure 2.1. If the switch is closed, circuit loop is formed among the
external source, the switch, and the opto-coupler. The current flowing on this loop is
sensed by the opto-coupler, and the digital input state is ON. On the other hand, if the
switch is open, no current flows through the opto-coupler, and the digital input state is
OFF. The voltage of the external source must meet the minimum value of ON state as
specified in the device specifications for proper operation.
An external signal source can also be used for a digital input channel. This is shown
in Figure 2.1 and Figure 2.2 for wet and dry contact configuration, respectively. The
signal source toggles between a high level voltage and a low level voltage, which
results in digital input ON and OFF states.
Figure 2.1 Digital input signal connection with wet contact configuration
The input voltage, which is the voltage between the DI+ terminal and the DI− terminal
for wet contact configuration and between the DI− terminal and the DIGND terminal
for dry contact configuration, must be either higher than the minimum value of ON
state or lower than the maximum value of OFF state for a deterministic result. If the
input voltage is between these two values, the result is undetermined, which may be
ON or OFF. In addition, do not input a voltage higher than the maximum allowable
value of ON state or lower than the minimum allowable value of the OFF state, other-
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Productinformatie
| Merk | Advantech |
| Model | PCIE-1760 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 2552 MB |
Caratteristiche Prodotto
| Connectiviteitstechnologie | Bedraad |
| Intern | Ja |
| Hostinterface | PCI-E |
| Output interface | PCIe |
