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APPENDIX
For current information see: 1194
Appendix
Glossary
AS
Abbreviation for Australian Standard.
ASI (Actor-Sensor-Interface)
Bus system for the lowest level of automation. Facilitates the simple
connection of sensors, actuators and integrated systems to the first
control level. See → Master-Slave principle. Up to 248 binary inputs and
outputs per grid, one cable for information and energy, reversepolarity
protected connection technology, 100 m cable length or up to 300 m
with repeaters, open tree structure of grid, protection class up to IP 67,
cycle time <5 ms, high immunity to interference and fault tolerance.
ASME
Abbreviation for the American Society of Mechanical Engineers (USA).
Assembly
A ready-to-install cable. It is cut to the appropriate length and fitted
with connecting elements (plugs, cable lugs, etc.) at the ends.
ASTM
Abbreviation for the American Society of Testing and Materials.
ATEX approval
This approval is required for the intended use of devices and protection
systems in areas at risk to explosions.
Attenuation
Attenuation is the reduction of the signal amplitude during transmis-
sion to a medium. It increases with the rising frequency and cable
length. The signal level is impaired in the process.
Attenuation a
The reduction of the optical signal power between two cross-sectional
surfaces of a fibre optic cable due to losses. The unit of measurement
is decibels (dB).
Attenuation coefficient a
The attenuation relative to the length of a fibre optic cable. The stand-
ard unit of measurement is decibel/kilometre (dB/km).
Automotive cable
Vehicle cables are cores and cables used in passenger cars and trucks
(e. g. ÖLFLEX® TRUCK at Lapp).
AWG
Abbreviation for American Wire Gauge. Standard expression for the
wire diameter. The smaller the AWG value, the bigger the wire diameter.
The actual values (mm) depend on the core resolution, regardless of
whether a fixed conductor or a strand is used.
AWM
UL marking for Appliance Wiring Material.
B
Backbone
Backbone or secondary wiring is the connection between the building
distributor and the individual floor distributors in a structured wiring
system.
Backscatter
A small fraction of the light that is deflected from its course due to
dispersion travels in a reverse direction, i. e. in the light waveguide
back to the transmitter. By observing the chronological progression of
the backscattered light using a beam splitter on the transmitter, it is
possible to measure not only the length and damping of an installed
light waveguide from one end but also local irregularities, e. g. light
losses in splices.
Backtwist
The term relates to the stranding process. The technical design of the
stranding machine twists the elements to be processed into a strand
without torsion.
BALUN
Balun is a term combining “balanced” and “unbalanced”. Baluns are
used for adjusting impedance and symmetry in the various transmis-
sion media in copper grids.
Banding
Wrapping a bundle of wires with relatively narrow paper, textile, plastic
or metal strips.
Bandwidth
Frequency range of a fibre optic cable within which data can be trans-
mitted within a particular time frame. The greater the bandwidth, the
more data that can be transmitted. The transmission speed depends
on the bandwidth of the entire network.
Bandwidth product
The bandwidth product is what results when the bandwidth of a glass
fibre cable is multiplied with the length of the measured section.
Bandwidth-length product
Measurement for the frequency range that can be transmitted by a fibre
optic cable one kilometre in length. It is a constant value.
BASEC
Abbreviation for the British Approvals Service for Cables. Certification
body – Great Britain and Northern Ireland.
Basic raw materials
In addition to the basic raw material, synthetic materials contain
a range of other components such as stabilisers, softeners, filler
and colour.
Batteries Act
The Battery Act came into force in 2009 and also covers the registra-
tion and return of batteries.
Battery cables
Link between battery and generator in the engine. They are developed,
manufactured and delivered in accordance with customer require-
ments/product specifications.
Baud
Unit for a modulation rate in the transmission of communications.
One step per second. 1 bit/s = baud, 1 Mbit/s = 1 Mbaud → see Bit
Bel
1 Bel = 10 decibels. In highfrequency technology, the common unit of
measurement for attenuation and, like decibel, a dimensionless ratio.
Bending capacity
The bending capacity indicates how far a product can bend without
forfeiting function.