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APPENDIX
For current information see:
www.lappgroup.com1201
Appendix
Glossary
Electric resistance
Resistance with which an electric circuit opposes the passage of the
current. Resistance is specified and measured in Ohms.
Electricity
Form of energy based on the flow of free electrons. Electricity is pro-
duced in generators.
Electromagnetic protection
Protection against faults that could affect the cable from outside
(immisions). Protection against faults caused by the cable (emissions).
Braid, e. g. copper (tin plated) → flexible → coverage. Protection against
external influences: mechanical, e.g. cables over edges; stepping on;
pulling of cables; chemical: e. g. oils; thermal: heat, cold.
Element
Individual component of cables, a collective term for cores, pairs, bun-
dles and carrier organs.
Elongation at break, ultimate elongation
Elongation at break is the ratio of the elongation to the initial length
when a break occurs.
Elongation, extension, stretch
Extension of a body by mechanical forces. In the cable industry, it is
tested using a mechanical testing method to determine the tensile
strength of all components.
ELOT
Hellenic Organization for Standardization. Certification body for
Greece.
EMC
Abbreviation for Electromagnetic Compatibility. The ability of a system,
machine or item of equipment to work satisfactorily in the electromag-
netic environment without itself causing any electromagnetic interfer-
ence that would be unacceptable for all systems, machines or equip-
ment in that environment.
EMK
Abbreviation for electromotive force.
EMS
Abbreviation for Electromagnetic Susceptibility. This is the functional
resistance of a specific object to electromagnetic interference factors.
EN
Abbreviation for European Standards.
EPDM
Abbreviation for Ethylene Propylene Dien Monomer rubber. Chemically
cross-linked elastomer with good electrical insulating properties and
outstanding flexibility at low and high temperatures.
EPIC
®
Abbreviation for Environmental Protected Industrial Connector. Regis-
tered trademark, a robust industrial connector from Contact.
ePLAN
®
ePLAN
®
is the leading CAE software for planning electrical designs and
documentation in machine and plant construction. The Lapp item data
and the cable type file enable the individual cores in the ePLAN
®
circuit
diagram to be assigned automatically. ePLAN
®
is produced by ePLAN
®
Software & Service GmbH & Co.KG. See
www.eplan.deEPR
Abbreviation for Ethylene Propylene Rubber.
Ethylene-Propylene- Rubber
See → EPDM
ETSI
Abbreviation for European Telecommunication Standards Institute. Its
duties include developing harmonised standards for an integrated
European communication system.
Explosive atmospheres
See VDE 0165 Part 1. Cables with a thermoplastic, duroplastic or min-
eral insulated metal sheath can be used for fixed routing. There may
not be any cavities in the core bundle (not hose cable). The extruded
embedding material and the fillers, if used (press extruded), must be
“non-hygroscopic”. Flame retardant in compliance with IEC 60332-1.
Cables for mobile and transportable equipment must have connecting
cables with an outer sheath made of heavyduty polychloroprene or an
equivalent synthetic elastomer or a heavy-duty rubber insulated cable
or connecting cables with a comparably robust construction.
Extension cord
A mobile cable assembled with a coupling connector and socket. The
couplings are integrally moulded onto the cable using thermoplastics
and contain protective contacts.
Extrusion line
It is powered by a motor and coils through a cylinder in a spiral. The
filler is made up of thermoplastic prepared in the form of granules.
Granules, i. e. a free-flowing mixture of grains of equal size, are the
delivery form of various plastics for cable manufacture; in other words,
an extruder is a system in which a continuous supply of granules is
heated, compressed, mixed and homogenised.
F
Farad
Unit of measurement for electrical capacitance.
FDDI
Abbreviation for Fibre Distributed Data Interface. Network type made
up of a double ring with a 100 Mbit/s transmission rate and using wave-
guides as the transmission medium.
Fibre cover
Made up of one or more materials and is used to mechanically insulate
the fibres and to protect them against damage.
Fieldbus technology
Sensors and actuators are conventionally connected to a controller or
evaluation unit using an analogue 4 – 20 mA signal. With this technol-
ogy, a 2-core cable is necessary for each connection between the
sensor or actuator and the controller. In addition, an input/output cir-
cuit (I/O) must be provided for each sensor and actuator in the control-
ler (normally a PLC or PC). The picture looks very different when using
a field bus system. In this case, all devices are connected to a bus
cable (2, 4 or 5 cores depending on the field bus system). An interface
card is used instead of the input/output circuits. This saves on I/O
cards, reduces the space required in the control cabinet and perma-
nently cuts the wiring costs. In conventional systems, information (e. g.
measured values or a fault signal) can only be transmitted in one direc-
tion and in very limited amounts. This can be from the sensor to the
controller or from the controller to the actuator. By contrast, in a field