Rockwell Automation 1786-RPFRXL ControlNet Fiber Ring Modules Installation Instructions - Manual (Page 8)

8 ControlNet Fiber-optic Ring Repeater Modules
Rockwell Automation Publication 1786-IN003D-EN-P - April 2011
About Fiber Topology
The 1786-RPFRL/B or 1786-RPFRXL/B long or extra-long modules can be
used to create a redundant optical link between segments. When used in a ring
topology, a single media failure between any two repeater modules in a ring will
not impact the communication link.
The repeaters detect the failure of an optical link. When a failure occurs, the
affected channel port status indicator will be one of the following:
• Red, indicating a faulty link
• Flashing green/off, indicating no network activity is present
Refer to Interpret the Status Indicators on page 28 for more information.
In addition, a relay contact connector on the 1786-RPFRL/B and
1786-RPFRXL/B modules indicates a remote faulty link. See
page 32 for more
information on the relay contact connector.
We recommend that you install the duplex optical cables of the two optical
channels along different routes. For more information on cabling, refer to
the ControlNet Fiber Media Planning and Installation Guide,
publication
CNET-IN001 .
The fiber repeater consists of the following:
• A 1786-RPA/B repeater adapter
• Up to two 1786-RPFRL/B or 1786-RPFRXL/B long or extra-long fiber
repeater modules
• Up to four 1786-RPCD copper fiber repeater modules
• Up to four 1786-RPFS or 1786-RPFM short- or medium-distance fiber
repeater modules