Archived 2016 Lapp Group International Catalog

Appendix Glossary

ÖLFLEX ® ACCESSORIES FLEXIMARK ® SILVYN ® SKINTOP ® EPIC ® HITRONIC ® ETHERLINE ® UNITRONIC ® APPENDIX

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.

EPR 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. 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 F Farad Unit of measurement for electrical capacitance.

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.de

For current information see: www.lappgroup.com

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