Rockwell Automation 9904-RPFM ControlNet Modular Repeater Medium-distance Fiber Module Installation Instructio - Manual (Page 9)

ControlNet Modular Repeater Medium Distance Fiber Module 9
Publication 9904-IN011A-EN-P - October 2000
Choose Fiber Cable Types
Multi-fiber cables for backbone use are available with a wide range of fiber counts;
between 2 and 216 fibers. The following figure shows an example of a multi-fiber
backbone cable and two fiber interconnect cable.
The type of fiber cable you choose to use depends on the network environment.
Consult your installation professional to determine
the best type of cable to use for your environmental
conditions.
Estimate Cable Lengths
The maximum length of a fiber cable section for the
9904-RPFM is dependent on the quality of the fiber,
number of splices, and the number of connectors.
The total attenuation for a cable section must be
less than 13.3dB.
Typically cable attenuation for a wavelength of 1300nm is less than 1.5dB/km.
Each fiber system has different constraints, therefore determining maximum fiber
optic cable lengths differs for each system. The 9904-RPFM is designed to solve
medium distance applications that require 3km (9843ft) between two ControlNet
products. We guarantee up to 3km, but you can achieve greater distances by
increasing the quality of the fiber cable and termination connector media. The
medium distance module provides ground isolation between nodes and is not
disrupted by the noise that affects traditional copper media.
IMPORTANT
Avoid splicing your cable. Connectors can cause considerable
attenuation and limit the maximum length of your system. Be
certain to check the attenuation of different cable sections
after the cable is installed.
zipcord
30689-M
multi-fiber
backbone cable