Archived 2016 Lapp Group International Catalog

Appendix Glossary

ÖLFLEX ® ACCESSORIES FLEXIMARK ® SILVYN ® SKINTOP ® EPIC ® HITRONIC ® ETHERLINE ® UNITRONIC ® APPENDIX of applications. The registers provide a colour template for designs, but also include safety and signal colours and comply with the colour spec- ifications in DIN standards. Rated current Current determined by the manufacturer, primarily at an ambient tem- perature of 40°C, which the connector can carry on a permanent basis and which simultaneously flows though all contacts which are con- nected to the largest possible conductor. In the process, not exceeding the upper limit temperature. Rated voltage Value of a voltage, measured according to the connector assembly and referring to specific operating conditions. REACH REACH directive (EC) No, 1907/2006 on registration, evaluation, authorisation and restriction of chemical substances With the REACH directive, the EU created a harmonised system for the registration, evaluation, authorisation and restriction of chemicals – referred to as REACH for short. The purpose of the directive is to ensure a high level of protection for human health and the environment. Receiver sensitivity The light output required by the receiver for low interference signal transmission. For digital signal transmission, the average light output (in W or dBm) required to achieve a bit error rate of 10 – 9 is normally specified. Receiver, optical Assembly for converting optical signals into electrical signals. It consists of a photodiode with a connecting fibre and plug and a low-noise ampli- fier and electronic signal processing circuits. Where possible, the main components of the receiver are normally combined into a compact sub-unit known as the reception module. Reel To keep setup times and transport costs down, the cable industry tries to supply large cables and long cable lengths on reels. In addition, this saves on connecting points and the associated fittings with longer cable lengths. The length supplied is limited by various factors, includ- ing the tensile strength and flexibility of the cable and the mass or cable volume. There are a large number of different reel sizes in the cable industry. Reel size choice Most winding systems in the cable industry now have tables showing the capacity and the product lengths and bending radii that can be wound, ensuring that the correct choice of reel can be made. Reel structure Reels consist of a circular core, which is bounded on both sides by flanges of larger diameter. The flange diameter is also the nominal size of the reel. Steel sockets are fitted in the centre of the reel flanges to hold the drive axes or barrels. These prevent damage to the reel flanges when winding and unwinding. On one reel flange (up to 1800 mm nominal size) there is a through hole for inserting one end of the cable; on larger reels, an inlet spiral is fitted to hold the end of the cable. This means that both ends of the wound length of cable are accessible and final inspection of the cable length can be carried out. Shipping reels are normally made of pine or spruce wood.

Reeling This refers to the ability of cables to withstand constant winding and unwinding over a long period of time without sustaining damage. For mobile consumers (e. g. a crane), the cable length required for the different working positions is carried on a reel. Constant winding and unwinding makes high demands on the cable construction, which means that only special cables are suitable. Reference earth Part of earth considered as conductive that lies outside the zone of influence of any earthing arrangement. Reflexion Signal reflections occur at coupling points between components such as plugs and cables and, in copper networks, can be attributed to differ- ent characteristic impedances: In cases of extreme differences in characteristic impedance, this leads to signal distortion. Refractive index The factor n, by which the light velocity in an optically dense medium (e. g. glass) is smaller than in free space. More accurate term: Phase refraction index. Refractive index distribution, index profile Progression of the refractive index n across the cross-sectional area of a fibre optic cable. Resistance Resistance = Voltage/Current: “Obstruction” of the current flow, expressed in Ohm. The lower the cross-section, the greater the resist- ance. The more Ohms, the weaker the current flow. See also → Corrosion resistance, ozone resistance, radiation-resistant cables. Resistant The cable has a resistance to certain substances, i. e. they do not destroy it. Retention of cable glands The ability of a cable gland to limit the movement of a secured cable under static load. RFID RFID stands for Radio Frequency Identification and means that data can be transmitted with no contact or line of sight. RJ45 An RJ45 connection is an eight-pin miniature connector system, e. g. for patch cables. The connector is standardised to comply with the ISO/IEC 11801 cabling standard. RoHS The EC directive 2011/65/EU for limiting the use of certain hazardous substances in electrical and electronic equipment governs the use of hazardous substances in equipment and components. Along with the applicable implementation in national law are referred to by the abbre- viation RoHS (Restriction of (the use of certain) hazardous substances). Route warning tape In excavations, the greatest damage occurs on cables already laid in the ground. For this reason, route warning tapes are laid around 40 cm above the laid cables, which draws the attention of excavator drivers to the cable route when excavating.

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