Glossary, Bending radius, Is nee – Rockwell Automation 1786-series ControlNet Coax Media Planning and Installation Guide User Manual
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Publication CNET-IN002B-EN-P - June 2010
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Glossary
The following terms and abbreviations are used throughout this manual. For
definitions of terms not listed here, refer to the Allen-Bradley Industrial
Automation Glossary, publication
analog circuit
A circuit in which the signal can vary continuously between specified limits.
attenuation
The decrease in magnitude of a signal. The total attenuation on a fiber-optic
cable is a function of the material and the length of the cable.
bending radius
The minimum radius to which a cable can be bent without damage.
bridge
An interface between links in a communication network that routes messages
from one link to another when a station on one link addresses a message to a
station on another link.
bus
A single path or multiple parallel paths for power or data signals to which
several devices may be connected at the same time.
bus topology
A link topology in which all stations are connected single path or multiple
parallel paths for power or data signals to which several devices may be
connected at the same time.
channel
A path for a signal.
chassis
A hardware assembly that houses devices, such as I/O modules, adapter
chassis, processor modules, and power supplies.
coax
Coaxial cable. A transmission line in which one conductor is centered inside
and isolated from a metal tube that serves as the second conductor.
control network
Control of plant floor devices, such as I/O chassis, robots, and other
intelligent devices.
controller
A unit, such as a programmable controller or relay panel, that controls
machine or process elements.
ControlNet network
An open control network that uses the producer/consumer model to
combine the functionality of an I/O network and peer-to-peer network, while
providing high-speed performance for both functions.
dielectric
A nonconductor of electricity.
digital circuit
A switching circuit that has only two states: on and off.
drop cable
Connects a device to a tap. Typically, drop cables are shorter in length than
compared to the trunk.