When choosing the type of input or output
module for your system (or DL05/DL06/
DL105 I/O type), it is very important to
have a solid understanding of sinking and
sourcing concepts. Use of these terms
occurs frequently in discussion of input or
output circuits. It is the goal of this section
to make these concepts easy to understand,
so you can make the right choice
the first time when selecting the type of I/O
points for your application. This section
provides short definitions, followed by
general example circuits.