Rockwell Automation T3488/T3488A ICS regent Monitored Guarded Output Modules - Manual (Page 10)

Monitored Guarded Output Modules (T3481/81A, 84, and 88/88A)
1 0 (Issue 2)
Industrial Control Services
Fault Tolerant Configuration
For fault tolerant operation, two monitored Guarded output
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.