Advantech PCIE-1751 User Manual page 28

Digital Output
A digital input/output (DI/O) channel can be configured by software to perform digital
input measurement, which is the power-on default configuration, or digital output
generation. When performing digital output generation, a voltage logic level is gener-
ated between the digital output (DO) terminal and the digital ground (DGND) termi-
nal. This is shown in Figure 3.3.
Figure 3.3 Digital output signal connection
Each digital output channel can source or sink only a finite amount of current. If this
limit is exceeded, the output voltage will not stay at the specified voltage logic level.
Refer to the device specifications for the maximum source and skin current values.
PCIE-1751 User Manual 20