Fiber segment constraints, Simplex cable – Rockwell Automation 1786-series ControlNet Fiber Media Planning and Installation Guide User Manual
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Rockwell Automation Publication CNET-IN001C-EN-P - October 2011
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Topology and Signal Considerations Chapter 2
Fiber Segment Constraints
Every network that uses fiber repeaters must maintain a minimum signal level for
each fiber segment in order to achieve an effective signal strength. Attenuation of
a fiber segment is effected by the quality of the termination at each connector,
splices, bulkheads, and the fiber cable. At any time, the total amount of
attenuation shall not exceed the power budget of the type of repeater module that
is being used.
Select a Module Type
Based on Distance
Requirements
When choosing a module type to use in a configuration, a commonly asked
question is ‘Can I use a particular cable with a particular module?’ You must
select a module (and the corresponding cable type) based on the distance you
want to achieve.
There are two types of fiber cable supported: single and multi-mode. These two
cable types differ in that single-mode cable allows light to travel in a single path.
Multi-mode cable allows light to travel in multiple paths. Single-mode cable is
generally used in longer distance applications.
Of these two types of cores, there are three configurations of cable commonly
found in manufacturing environments:
•
•
•
All three cable configurations have either single- or multi-mode cores.
Simplex Cable
At each end, the cable is terminated with a connector appropriate to the type of
fiber module to which the cable is attached.
IMPORTANT
The attenuation values for connectors, splices, bulkheads, and cable are
available in the manufacturer’s specifications for your products.
31506-M