Table of Contents Table of Contents
Previous Page  1207 / 1218 Next Page
Information
Show Menu
Previous Page 1207 / 1218 Next Page
Page Background

ÖLFLEX

®

ACCESSORIES

FLEXIMARK

®

SILVYN

®

SKINTOP

®

EPIC

®

HITRONIC

®

ETHERLINE

®

UNITRONIC

®

APPENDIX

For current information see:

www.lappgroup.com

1207

Appendix

Glossary

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.

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.

PiMF

Abbreviation for pairs in metal foil.

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

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.

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