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Industrial Ethernet Book 103

Technology has piqued the interest of manufacturers. This is because, in general, shielded single-pair Ethernet cabling offers all of the features required to fulfil the mega trend described above. They are fast, space-saving, cheap and simple to implement. For this reason, i n d u s t r y , w h o s e automation profile is now largely based on 1000 Mbit Ethernet ( 1 0 0 B A S E - T X ) , i s showing increasing interest in solutions w i t h s i n g l e - p a i r Ethernet. In fact, within building automation developers are actively considering the different possibilities provided by integrating single-pair Ethernet within the hierarchy and structure of contemporary building cabling. Then there are also numerous other application areas, which present attractive opportunities for the development of single-pair Ethernet. The interest in single-pair Ethernet also reflects a general trend in standardised network cabling, and diversification of structured cabling for specific application areas. ISO/IEC JTC1 SC25 WG3 currently includes activities or projects which deal with the realisation and implementation of the technical results of IEEE 802.3 within structured building cabling. Single-pair transmission channels What do the standards activities look like for single-pair Ethernet communication? First of all, standardisation is a continuous, dynamic process, which develops and publishes new standards, revokes existing papers or updates and launches new standards projects. Therefore, this white paper is just intended to be a snap shot of the state of standardisation. Standards activities in IEEE802.3 defi ne the Ethernet transmission protocol and defi ne the minimal requirements for link segments (link segments are not identical but similar to the transmission channel of cabling). ISO/IEC JTC1 SC25 WG3 defi nes the required cabling and in doing so relies on the component standards for cables and connectors, which are given in the IEC standards groups. As already mentioned, the following IEEE 802.3 standards have already been published: IEEE 802.3bp 1000 BASE-T1 “Physical Layer Specifi cations and Management Parameters for 1 Gb/s Operation over a single Twisted Pair Copper Cable”. In this, single-pair Ethernet transmission 1 2 3 4 5 New designs offer the ability to transmit Ethernet according to 1000Base T1 over a single-pair cabling channel. via a 15 m UTP channel (Type A, unshielded) and a 40 m STP channel (Type B, shielded) is defi ned. Both channels are specifi ed for a bandwidth of 600 MHz, may contain up to four connections and guarantee a transmission capacity of 1 Gbit/s. IEEE 802.3bu “Physical Layer and Management Parameters for Power over Data Lines (PoDL) of Single Balanced Twisted-Pair Ethernet” Analogously to PoE (Power over Ethernet), this also specifi es the parallel provision of energy up to 50 W via single-pair Ethernet channels. ISO/IEC JTC1 SC25 WG3 currently includes activities or projects which deal with the realisation and implementation of the technical results of IEEE 802.3 within structured building cabling. Cross-section of SPE cable 1. 2. 3. 4 5. Conductor: Uncoated Cu (stranded), AWG26/7 Isolation stranding element: Cell-PP, wire ø: NW 1.25 mm, pair Alu-coated polyester film, metal-side external (PiMF) Tinned Cu-meshing, optical covering approximately 90% Halogen, flame-resistant compound SOURCE: HARTING SOURCE: HARTING Therefore, a technical report is being prepared under the title “TR ISO/IEC 11801- 99xy‚ One Pair Channels up to 600MHz”, which describes shielded single-pair transmission channels. The target applications are the so-called “non-automotive” segments or Industry 4.0, IoT and smart lighting in the style of IEEE 802.3bp. These transmission channels allow bidirectional transfer of 1 Gbit/s by using a balanced pair up to 40 m with simultaneous energy supply of end devices. The transmission channels typically consist of a permanent link 36 m in length which incorpo-rates up to four connections and two 2 m long patch cords. This document is scheduled for completion in 2018. As part of the restructuring and updating of ISO/IEC 11801 standards series (as 3rd Cabling design standards on European and international level scheduled for 2018/19. 31 11.2017 industrial ethernet book


Industrial Ethernet Book 103
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