9 Appendix
9.3 Glossary
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Repeater
Amplifier for signals transmitted via a bus.
Root-connecting
Creating a new potential group using a power supply module. This allows sensors and loads to be
supplied individually.
RS 485
Serial interface in accordance with EIA standards, for fast data transmission via multiple transmitters.
Serial
Type of information transmission, by which data is transmitted bit by bit via a cable.
Setting parameters
Setting parameters of individual stations on the bus and their modules in the configuration software of
the master.
Shield
Conductive screen of cables, enclosures and cabinets.
Shielding
Description of all measures and devices used to join installation components to the shield.
Short-circuit proof
Characteristic of electrical components. A short-circuit proof part withstands thermal and dynamic loads
which can occur at its place of installation due to a short circuit.
Station
A functional unit or I/O components consisting of a number of elements.
TCP
Abbreviation for Transmission Control Protocol, connection-oriented transport protocol within the
Internet protocol suite. Certain error detection mechanisms (i.e. acknowledgements, time-out moni-
toring) can guarantee a safe and error free data transport.
Terminating resistance
Resistor on both ends of a bus cable used to prevent interfering signal reflections and which provides
bus cable matching. Terminating resistors must always be the last component at the end of a bus
segment.
To ground
Connection of a conductive component with the grounding connection via a grounding installation.
Topology
Geometrical structure of a network or the circuitry arrangement.
UDP
Abbreviation for User Datagram Protocol. UDP is an transport protocol for the connectionless data
between Ethernet hosts.
Unidirectional
Working in one direction.
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