Rockwell Automation T3408 ICS Regent DC Digital Input Modules - Manual (Page 6)

DC Digital Input Modules (T3401, 02, and 08)
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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 DC 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
Field wiring terminal blocks on the I/O chassis are used to
connect the field input signals and the common power return
signals to the module. The terminal blocks are located
directly above and below the slot where the module is