Rockwell Automation 1715-OF8I Redundant I/O System User Manual - Manual (Page 83)

Rockwell Automation Publication 1715-UM001C-EN-P - March 2014 83
Installation Instructions Chapter 2
An independent watchdog arrangement also monitors the module operation and
provides additional fault containment by activating a shutdown mechanism if a
fault is detected.
The adapter module also monitors the input data paths and can detect faults
within each input channel. A visual indication of the module status and
individual channel status is provided by an array of front panel indicators.
The range of termination assemblies can accept one or two input modules. Each
assembly provides passive signal load termination and fuse over-voltage
protection on each input channel. The system provides flexible and scalable input
connectivity through mating termination assemblies with the relevant number of
input modules.
IMPORTANT If a fault occurs during normal operation in a duplex-configured system, an
input module can be removed and replaced without disrupting the flow of
input data.