Isolated Digital Input; Figure 3.3:Isolated Digital Input Connection - Advantech PCIE-1756 User Manual

3.3.2 Isolated Digital Input

Each of isolated digital input channels accepts bi-directional 10 ~ 30 V
DC
voltage inputs. Meaning that you can apply positive or negative voltage to
an isolated input pin (V ). Every 16 input channels share one common
IN
pin. Figure 3.3 shows how to connect an external input source to one of
the card's isolated input channels.
Figure 3.3: Isolated Digital Input Connection
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