Archived 2016 Lapp Group International Catalog

Appendix Glossary

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

Patch cable Patch cable complying with EN 50173/ISO IEC 11801 is used to pro- vide a flexible connection between ports in patch fields and the con- nection to telecommunication sockets. Patch field A patch field is the switching device that is used to set up, establish and route connections.

plastics produce highly toxic gases when they burn, which form aggres- sive acids when they mix with extinguishing water and can, in turn, cause extremely severe corrosion damage.

Power dissipation factor Power that is converted into heat or other energy losses.

Preform Glass rod from which the glass fibres for light waveguides are drawn. When drawing the glass fibres, the ratio of core glass to shell glass is maintained. Print wheel This procedure is generally only a cost-effective option for average or large batches as a new print wheel is required for every change made to the print. Print wheels can, however, be used for geometrical logos and inverse printing. Print wheel results are also relatively easy to remove and wipe away. PROFIBUS The PROFIBUS network is based on the principle of master- slave com- munication. A central controller – the field bus master – cyclically reads the information from the field devices – the field bus slaves – and writes their output values. In a PROFIBUS DP network, a high-speed transmission rate of up to 12 Mbit/s is possible. It is based on the European standard EN 50170. Protective conductor (Symbol PE) A conductor that is necessary for certain protective measures against shock currents to create the electrical connection to subsequent parts. The protective conductor is marked in green/ yellow (GNYE) in cables. PTFE Abbreviation for polytetrafluoroethylene, TEFLON ® plastic (PTFE); a trade name of the company Du Pont de Nemours. PUR Abbreviation for polyurethane; a ductile, abrasion resistant thermo- plastic alternative to rubber, e. g. in ÖLFLEX ® 400P, ÖLFLEX ® 540P.

PE Abbreviation for polyethylene.

Photodiode Semiconductor diode that absorbs light and feeds the charged particles released to an external circuit as a photoelectric current. A distinction is made between PIN photodiodes and avalanche photodiodes. Photovoltaic Photovoltaics refers to the direct conversion of solar energy into elec- trical energy using solar cells. Photovoltaics is a branch of solar tech- nology, which includes other technical uses of solar energy. Pigtail Short part of a fibre optic cable on a laser diode or connector. The pigtail is the coupling link between a component and transmission fibre and is permanently fixed to the component. Pollution level Numerical value specifying the anticipated pollution of the micro-envi- ronment. Pollution levels 1, 2 and 3 are used. The pollution level is used to assign air gaps and creep distances. In industrial environments, the pollution level is typically 3. Polyamide Polyamide is a polymer. Polyamide is cold resistant with impact loads, impact resistant and abrasion resistant. Polycarbonate The prerequisite for resistance is that no aggressive components such as emollients (PVC) or solvents attach the polycarbonate. The material swells up, which can lead to stress cracks. Polychloroprene-rubber Synthetic rubber is resistant to solvents, has very good strength prop- erties and is flame resistant, however very expensive (high-quality rubber cables, Pattex glue). Polyethylene Polyethylene is a halogen-free plastic, but is highly flammable. By adding additional materials, PE can be made flame retardant and smokeless. Polyuretane Extremely impact resistant, difficult to strip, strong reset forces. (PUR, 11Y, Q). Polyvinylchloride Polyvinylchloride is a halogenated plastic. The halogens are chlorine, bromine, fluorine, iodine and astatine. Chlorine and fluorine are used to make plastics flame retardant and more resistant to external influ- ences. Cables with PVC sheathing are flame retardant. Halogenated PiMF Abbreviation for pairs in metal foil.

PVC Abbreviation for polyvinylchloride.

PVC-powder additive Additives are added to PVC mixtures as matting agents, lubricants, colour pigments, wax for smooth surfaces.

Q Quad Stranding type in which the four individual cores are twisted into a quad (telecommunications cables).

R RAL

The RAL colours with four-digit numbers have been a yardstick in col- ouring for more than 70 years. The collection of colours currently includes more than 200 colours. The basic collection for mat shades is the RAL 840-HR register. The collection for gloss shades is the RAL 841-GL register. The basic collections are continuously updated in line with the requirements of industry. These collections cover a wide range

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