Specifications

Chapter 3
– 21 – PCI-1762 User’s Manual
Advantech Co., Ltd.
www.advantech.com
Chapter 3
3. Signal Connections
3.1 Overview
Maintaining signal connections is one of the most important factors in
ensuring that your application system is sending and receiving data
correctly. A good signal connection can avoid unnecessary and costly
damage to your PC and other hardware devices. This chapter provides
useful information about how to connect input and output signals to
the PCI-1762 via the I/O connector.
3.2 Isolated Digital Input Connections
The PCI-1762 has 16 isolated digital input channels designated
IDI0~IDI15.
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
). The figure
below shows how to connect an external input source to one of the
card’s isolated input channels
Figure 3-1: Isolated digital input connection
PC 5V
IDI channels
InternalExternal
Protection
Circuit
Bi-direction
diode
S Vin
IDI
ECOM