Rockwell Automation 57C329 Remote I/O Communications, AutoMax - Manual (Page 62)

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3.9 Remote I/O Network Coaxial Cable
Maintenance
Over time, Remote I/O network operating efficiency may suffer from
gradual degradation of the network cabling components or changes
in the environmental conditions along the cable paths. In order to
prevent this from occurring, some preventive maintenance should be
performed on the network. See sections 3.9.1 through 3.9.3 for more
information.
3.9.1 Remote I/O Cable Documentation Maintenance
It is important to keep the network cable documentation upĆtoĆdate
with all of the changes that are made to the network.
3.9.2 Remote I/O Cable Design Maintenance
When old equipment is removed or new equipment is installed, new
sources of heat, electrical noise, or hazardous chemicals may appear
in the Remote I/O network's environment. Evaluate the effect these
changes will have on the performance of the network. If necessary,
take corrective actions such as reĆrouting certain cable segments or
installing additional cable shielding.
3.9.3 Remote I/O Cable Inspection
Inspect the Remote I/O cabling periodically for damage, shorts, or
discontinuity. To performthese tests, use the appropriate time
domain reflectometer (TDR). Time domain reflectometers can also be
used to performcable testing during installation or when trying to
locate a cable fault during troubleshooting. Be sure to document all
tests properly.