36
U s i n g t h e I s o l a t e d D i g i t a l I / O
The isolated digital expansion I/O operates in the very same
manner as the standard isolated I/O. The only differences are
the location of the pull-up switches, and the method of supply-
ing an external pull-up voltage.
The pull-up switches are located on the bottom of the expansion board. They
operate in the same fashion as the standard I/O set pull-ups. Configuring and using
these switches is detailed in Section 8 of this document.
Another key difference is the method by which an external pull-up voltage is
Figure 9.1: Installing the Isolated Digital I/O Expansion Module
Tightening Torque
Specification For [A]:
4 to 5 lb-in
(0.45 to 0.56 N-m)
The I/O ground is common
when the Isolated I/O
module’s installed. VPULL,
however, is not common.
If you want to supply
an external pull-up supply
to multiple modules VPULL
must be connected to your
supply on each module!
Figure 9.2: The Isolated Digital I/O Module, Bottom View
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from