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ControlNet Modular Repeater Medium Distance Fiber Module
Publication 1786-IN011B-EN-P - October 2000
Specifications for 1786-RPFM Fiber Optic Cable
The quality of the fiber cable determines the distance you can achieve. Consult
your local distributor for attenuation specifications prior to purchasing your fiber
media components. The table below provides specifications for fiber optic cable:
The medium-distance fiber module (1786-RPFM) is designed for use with 62.5/
125µm multi-mode optic fiber and plastic or ceramic ST type connectors. The
wavelength used is 1300 nm.
Estimate Cable Lengths
The maximum length of a fiber cable section for the 1786-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.
Item
Description
Fiber Type
62.5/125
µm
Fiber Termination Type
ST
(Plastic or ceramic)
Fiber Operating Wavelength
1300nm
Optical Power Budget
13.3db
1
1
This includes all loss associated with the fiber link, including: splices, fiber attenuation, bulkhead connectors,
and the 1786–RPFM ST terminations.
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.