
AC Digital Input Module
(T7404)
6
Industrial Control Services
in the field, the redundant modules are connected so that each
sensor connects to one of the redundant modules. These
configurations are illustrated in Figure
4
, showing triple
redundant input modules. Each AC digital input module is
hot replaceable. In triple redundant input configurations, if a
fault occurs on one module, it can be removed and replaced
while the system continues to sense the inputs from the
remaining two input modules.
Figure
4
. Fault Tolerant Digital Input Configurations.
Field Wiring
For field wiring details, refer to PD
-
7901
-
I/O Termination
Assembly.
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