Download Super E50 User Manual

Control Network Specifications
-2
Appendix H
5
form corrosive materials or vapors, excessive moisture, impact or crushing
damage, and electrical noise.
H.5
z
Control room cabing can be run overhead or under the floor.
z
It is recommended that the secondary control network cabling be routed
differently than that of the primary network. This helps ensure uninterrupted
communications if the primary network suffers physical damage.
z
Use fiber-optic cable for all distance greater than 100m or between buildings
or in areas that might have high electromagnetic interference.
Extending the Control Network with Media Converters
For longer control network distancees, media converters are used to connect 10BaseT
copper cable to 10Base FL fiber-optic or 100BaseT copper cable to 100BaseFX fiberoptic cable. These compact devices are simple to use, easy to insatll, and require no
software changes. All signal activity, including collision data, is detected in any
combination of connected segments or devices.
Note:
The media converters do not inflict any repeater (hop) dalay and are
completely transparent to normal network operation. The media converters do
not count as hops in the four-hop cascade limit for the Super E50 system.
Because the incoming signals from either medium are restored by the
converters, the distance limitations imposed by the Super E50 system do not
apply. Therefore, normal maximum media lengths can be achieved on both
sides of the converters.
Caution: we recommended you do not use RJ-45 to 10BaseFL repeaters because
each device adds one hop to your control network
When using fiber media converters to extend the distance between hubs, two
converters are required per run of fiber optic cable: one to convert from10BaseT cable
to fiber optic cable and one to convert from fiber optic cable back to 10BaseT cable.
The maximum fiber optic cable distance possible for each segment varies with the
hardware. Refer to the manufacturer’s documentation for the maximum length for your
applications.
Super E50 User Manual
129