1、BS EN 13149-2:2004ICS 35.240.60; 43.080.20; 45.060.01NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDPublic transport Road vehicle scheduling and control systems Part 2: WORLDFIP cabling specificationsThis British Standardwas published under theauthority of the
2、StandardsPolicy and StrategyCommittee on 31 July2009. BSI 2009ISBN 978 0 580 53499 7Amendments/corrigenda issued since publicationDate CommentsBS EN 13149-2:2004National forewordThis British Standard is the UK implementation of EN 13149-2:2004. Itsupersedes DD ENV 13149-2:2000 which is withdrawn.The
3、 UK participation in its preparation was entrusted to TechnicalCommittee EPL/278, Road transport informatics.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users
4、are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 13149-2:2004EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 13149-2July 2004ICS 35.240.60; 43.080.20; 45.060.01 Supersedes ENV 13149-2:2000 English versionPublic transp
5、ort - Road vehicle scheduling and control systems -Part 2: WORLDFIP cabling specificationsffentlicher Verkehr - Planungs- und Steuerungssystemefr Straenfahrzeuge - Teil 2: WORLDFIP Spezifikation frdie VernetzungThis European Standard was approved by CEN on 1 April 2004.CEN members are bound to compl
6、y with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secret
7、ariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
8、versions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Swit
9、zerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2004 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN
10、13149-2:2004: EBS EN 13149-2:2004EN 13149-2:2004 (E) 2 Contents page Foreword3 1 Scope4 2 Normative references4 3 Cabling specifications 4 3.1 General remarks .4 3.2 Characteristic impedance5 3.3 Polarity 5 3.4 Signal conductors5 3.5 Connections between devices 5 3.6 Connection/disconnection of a de
11、vice 5 3.7 Spur length6 3.8 Connectors7 3.9 Branch cable polarity:7 3.10 Cable jointing.8 3.11 Clustered connections to the bus8 3.12 Multiple clusters.9 3.13 Shield ground connection10 3.14 Shield connections at a device10 3.15 Noise from additional circuits 11 3.16 Trunk terminating load resistanc
12、e.11 3.17 Test tap connection.12 3.18 Test device 13 3.19 Power circuit initialisation 13 3.20 Continuous power conditions 13 3.21 Power circuit distribution and protection .13 3.22 Cabling inside a vehicle 13 3.22.1 General .13 3.22.2 Electrical isolation .13 3.22.3 Vehicle cable ducts.13 Annex A (
13、informative) Cable specifications 14 Annex B (informative) Data transmission trunk cable installation guidelines.15 Bibliography 17 BS EN 13149-2:2004EN 13149-2:2004 (E) 3 Foreword This document (EN 13149-2:2004) has been prepared by Technical Committee CEN/TC 278, “Road Transport and Traffic Telema
14、tics“, the secretariat of which is held by NEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2005, and conflicting national standards shall be withdrawn at the latest by February 2005.
15、 This document supersedes ENV 13149-2:2000 According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, H
16、ungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. BS EN 13149-2:2004EN 13149-2:2004 (E) 4 1 Scope This document defines the cabling specifications for an onboard data transm
17、ission bus between the different parts of equipment for service operations and monitoring of the fleet. This document is applicable to equipment installed onboard buses, trolley buses and tramways only as part of a bus fleet operation. This equipment include operations aid systems, automatic passeng
18、er information systems, fare collection systems, etc. Equipment directly related to the functioning of the vehicle (e.g. driver dashboard, engine management, brake systems, door opening systems) are excluded from the scope of this document and are dealt with in other standardisation bodies. This doc
19、ument is not applicable to tramways operated as part of a train, subway or metro operation. Two alternative transmission buses will be accepted. This document refers to one of them (known as WORLFIP and specified in EN 50170). A second set of standards will be published for the other solution (so ca
20、lled CAN). The selected bus system, between the two standardised alternatives, shall be subject to an agreement between each transport operating organisation and its equipment providers. This document covers the link between equipment inside a single vehicle. Although it could be applied to multiple
21、 vehicles, this application is not explicitly covered by this document. This document is the second part of a set of standards related to the onboard transmission bus, which will define the following aspects for each allowed transmission bus: choice of the bus and general applications rules (EN 1314
22、9-1) cabling specifications (EN 13149-2, this document) message content specifications (prCEN TS 13149-3, under development) 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For und
23、ated references, the latest edition of the referenced document (including any amendments) applies. EN 50170 General purpose field communication system EN 61158-2:1994 Fieldbus standard for use in industrial control systems; part 2: physical layer specification and service definition (IEC 61158-2:199
24、3) 3 Cabling specifications 3.1 General remarks The principles for the coupling of devices to the data transmission bus focus upon the longer term objectives which are to achieve the least necessary number of variants, rather than to allow for the profusion of interim and migratory solutions which m
25、ay occur initially. This is especially important for public transport road vehicles, which are generally equipped in different non-correlated stages (for example, first the fare collection system, then the radio and automatic location system some months or years later, etc.) BS EN 13149-2:2004EN 131
26、49-2:2004 (E) 5 It is important to understand that electrical connections onto the bus have some impact upon the network performance, and that the practice is dependant upon the principles relevant to transmission lines rather than simple electrical power circuits. Since one of the main objectives i
27、s to provide the minimum amount of cabling on vehicles the basic power concepts are also covered with flexibility to suit different circumstances. 3.2 Characteristic impedance The main trunk circuit shall be a single pair twisted and shielded cable of nominal characteristic impedance of 150 Ohms at
28、1Mhz with overall braided shield. This shall not be connected in the form of a ring. 3.3 Polarity The polarity of the signal conductors shall be maintained throughout the trunk: Pair 1 Wire 1 (White) - Data + Wire 2 (Black) - Data - 3.4 Signal conductors The signal conductors shall not be used for p
29、owering any devices. 3.5 Connections between devices The one pair cable can be run between devices in a daisy chain fashion but shall be terminated with a 150 resistor at each end. Key A device 1 B device 2 C device N X Data + White Y Data - Black Figure 1 Connection between devices 3.6 Connection/d
30、isconnection of a device To avoid the disruption to the trunk continuity when a device is removed, the cable shall be joined on the trunk side of the device connector. This will allow removal of a device without causing a failure to the remaining network. BS EN 13149-2:2004EN 13149-2:2004 (E) 6 Key
31、A device 1 D data Figure 2 Connection/disconnection of a device 3.7 Spur length To minimise the mismatch caused by a spur, the cable connection at the device shall be within 2,5 cm of the coupling transformer. Key A coupling transformer B connector D data Figure 3 Spur length BS EN 13149-2:2004EN 13
32、149-2:2004 (E) 7 3.8 Connectors Types of connectors are not mandatory but the following conventions are recommended: Cable Side - Socket (receptacles) Device Side - Plug (pins) Four way connectors Nine way connectors Terminal 1 a Data + Terminal 1 Screen 2bDat- 2 3 c DC + ve 3 4dDC -ve 4 56 Dat +7 -
33、8 DC +9 -When a connection that breaks into the trunk circuit is required a tap connection can be provided. This could be provided using a two pair branch cable. 3.9 Branch cable polarity: The polarity of the signal conductors shall be maintained. Pair 1 Wire 1 White Data + Wi2 Black D- Pair 2 Wire
34、1 Red Data + Wire 2 Green Data - See additional tables in annex, A which refers to cables for up to six pairs for additional circuits. Key A device 1 D+W data+white D-B data-black W white B black R red G green 1 Data+ 2 Branch cable 3 Drain wire connections to shields 4 Tap box Figure 4 Branch cable
35、 polarity BS EN 13149-2:2004EN 13149-2:2004 (E) 8 3.10 Cable jointing The wires shall be joined to maintain the data polarity. These shall be crimped and insulated to maintain the circuit integrity. The screen continuity shall be maintained by the drain wire. The cable sheath shall be clamped to pro
36、vide strain relief. See Figures 5 and 6. Key A ground terminal (only when required) B trunk C insulated screened box D branch Figure 5 Cable tap with branch cable Key B trunk Figure 6 Cable join with a connector (CC1) 3.11 Clustered connections to the bus Provided that individual devices are not les
37、s than 8kOhms input impedance, and up to 2,5 cm length spur as required in 3.6, then up to a maximum of four devices may be clustered within a minimum trunk length of 4 metres. EXAMPLE: To comply with the above branch cables of 0,7 m could be applied where devices are clustered onto the trunk. This
38、would provide six lengths of 0,7 m = 4,2 m which exceeds the 4 m minimum. BS EN 13149-2:2004EN 13149-2:2004 (E) 9 Key 1 device 1 2 device 2 3 device 3 4 device 4 A branches B trunk C multiple tap box Figure 7 Clustered connections to the bus 3.12 Multiple clusters The minimum distance between cluste
39、rs shall be not less than 4 metres, as shown in Figure 8. Figure 8 Multiple clusters Where there is a requirement to cluster devices, for example within an equipment rack, and connections to the trunk are made via a wired backplane, then active multi-port couplers (see Figure 9) or matching devices
40、such as passive attenuators (see Figure 10) should be applied either side of the cluster. See EN 61158-2:1994, section 12.2.2, Network Configuration rule No. 8. Key A active multiport coupler B trunk Figure 9 Application of an active multiport coupler BS EN 13149-2:2004EN 13149-2:2004 (E) 10 Key 1 t
41、runk 2 attenuator Figure 10 Application of an attenuator 3.13 Shield ground connection The trunk cable shield shall be connected directly to the vehicle ground at one point only. It is recommended that this shall be close to the vehicle power supply. The tail connection shall not be common to other
42、power return circuits and the resistances shall be as shown in Figure 11: Key A vehicle battery B power feeds C trunk shield D tail E vehicle chassis F other power returns Figure 11 Shield ground connection The tail connection shall be installed in a manner that minimises inductive or electrostatic
43、coupling from other circuits or equipment on the vehicle. The tail connection shall be crimped onto a ring terminal, which shall be connected onto the ground terminal of one of the tap boxes. 3.14 Shield connections at a device The cable shield connections at devices shall remain insulated from the
44、vehicle chassis except as above and devices should be connected as follows: BS EN 13149-2:2004EN 13149-2:2004 (E) 11 Key 1 connector shield insulated from cable shield 2 device 3 cable sheath 4 device shield 5 device ground Figure 12 Shield connections at a device The shield decoupling components sh
45、ould be provided in the cases where the device casing is connected to the ground. If the casing is metallic, it is recommended that this casing be connected to the vehicle ground. When necessary, shield-decoupling components should be provided within each device as follows: C = 4,7 nF 2 kv ceramic V
46、DR = EPV 7A 250 v a.c, 320 v d.c. 3.15 Noise from additional circuits Where it is possible to utilise a single connector to a device, the power circuits may be provided within the branch cables together with any additional circuits, which are specific to the device. In these circumstances any such e
47、xternal conditions shall be regarded as an integral part of the device itself and the noise limits of 5 mV rms. measured differentially over the band of 1 kHz to 4 Mhz referenced to the trunk, as detailed in EN 61158-2:1994 section 12.3.2, shall not be exceeded. 3.16 Trunk terminating load resistanc
48、e The trunk circuit on a vehicle shall be installed and maintained such that there are terminating load resistors at the extremities. These shall be equal to the characteristic impedance, i.e. 150 Ohms. EXAMPLE: Figure 13 shows various possible arrangements. BS EN 13149-2:2004EN 13149-2:2004 (E) 12
49、Key 1 device 1 2 device 2 N device N A terminating load resistor NOTE Termination within a device as diagram (iii) is not recommended due to extra difficulty in extending the trunk. Figure 13 Possible arrangements for trunk terminating load resistance 3.17 Test tap connection It is recommended that a test tap be provided that enables a test device to be connected to the trunk. The cable spur to the test device should include a minimum 6dB passive attenuator at the connector and a test lead of 1 m length. Key 1 device 1 2 device 2 N device N
