Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 413)

Section
7B
7B-1
Fiber Optic Connections
Page 1B-1 begins illustrations of typical small and large system
configurations and the modules that can be used. Most inter-module
communication is accomplished through fiber optics.
Most I/O devices, including handwheels, the standard MTB panel, and the
operator panel, are connected to the control through an “I/O ring”. Ring
devices each have an optical transmitter and receiver. Optical transmitters
are connected to optical receivers using fiber optic cable to form the I/O
ring.
The I/O ring must be complete; each transmitter must be connected to a
receiver or an I/O ring communications error will occur.
Each module using the I/O ring must be included in the I/O Assignment
file. The I/O Assignment file is edited using the I/O Assignments utility of
the Offline Development System (ODS).
Fiber optic cables can be damaged by excessive bend radii, excessive
pulling forces, or crushing forces. If the transmissive core is scratched or
nicked, transmission characteristics may deteriorate noticeably and
mechanical failure (breakage) of the core will be accelerated.
The following fiber optic cable installation recommendations should be
taken into account:
Avoid pulling cable over sharp edges.
Do not install cable in areas where it is likely to suffer impact damage
(from such things as dropped tools).
Avoid installing cable in areas where it will experience repeated flexing,
particularly with small radii.
Support cable in long vertical runs.
7B.0
Section Overview
7B.1
Fiber Optic Cable
Specifications