Rockwell Automation T3464 ICS Regent AC Guarded Digital Output Module - Manual (Page 10)

AC Guarded Digital Output Module (T3464)
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Industrial Control Services
Fault Tolerant Configuration
For fault tolerant operation, two Guarded modules are
connected in parallel as shown in Figure 4. In this
configuration, operation continues even if one module fails.
In the fault tolerant configuration, a failed module can be
removed and replaced without interrupting operation of the
loads.
Figure 4. Fault Tolerant Configuration.
Fault Tolerant Configuration with Redundant
Actuators
When redundant actuators are installed in the field, the level
of fault protection can be extended to include the field wiring
and actuators. Each actuator should be connected to an
individual guarded output module as shown in Figure 5.
In this configuration continuous operation can be maintained
even if a module, field wiring or load fault occurs.