1、- STD.BS1 BS EN 12675-ENGL 2001 m 1624669 0895938 351 m BRITISH STANDARD BS EN 12675:ZOOl Ifraffic signal controllers - Functional safety requirements The European Standard EN 126752000 has the status of a British Standard ICs 93.080.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRI
2、GJ LAW STD-BSI BS EN 12675-ENGL 2DO1 D lab24669 OB95919 298 W BS EN 12675:2001 Amd. No. Date This British Standad, having been prepared under the direction of the Electrotechnical Sector Committee, was published under the authority of the Standars Committee and comes into effect on 15 February 2001
3、Comments O BSI 022001 ISBN O 680 36886 6 National foreword This British Standard is the official English language version of EN 126752000. The UK participation in its preparation was entrusted to Technical Committee EPU526, Road traffic control signais, which has the responsibility to: - aid enquire
4、rs to understand the text; - present to the responsible European committee any enquiries on the - monitor related international and European developments and promulgate interpretation, or proposals for change, and keep the UK interests informed; them in the UK A list of organizations represented on
5、this committee its secretary. This standard contallis a number of performance criteria which are defined by the selection of a class. This procedure has been adopted to enable European members to select a class that meets the regulatory requirements of the member. Performance classes for application
6、 in the UK are contained in “-affic Signs Regulations and General Directions” (TSRG), published by The Stationery Office. Advice should be sought fi-om The Department of the Environment, Transport and the Regions when selecting classes. Cross-references The British Standards which implement internat
7、ional or European publications referred to in this document may be found in the BSI Stands Catalogue under the section entitled “International Stan- Correspondence Index”, or by using the “Find” facility of the BSI Staaidards Electronic Catalogue. A British Standard does not purport to include all t
8、he necessary provisions of a contract Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. be obtained on request to Summary of pages This document comprises a front cover, an inside fr
9、ont cover, the EN title page, pages 2 to 16, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. STD-BSI BS EN L2b75-ENGL 2001 Lb24bb9 0875720 TOT H EUROPEAN STANDARD NORME EUROPENNE EUROPAISCHE NORM EN 12675 October
10、 2000 _ ICs 93.080.30 English version Traffic signal controllers - Functional safety requirements Contr b) the display of a green signal to conflicting traffic; c) the failure to display the correct signal sequence to traffic; d) the failure to provide the correct timing of all signals. a) users of
11、traffic signals, drivers and passengers of vehicles (including public transport), pedestrians, cyclists and equestrians, persons with physical disabilities: b) maintenance and inspection personnel. Persons to be safeguarded are: O BSI 02-2001 STD-BSI BS EN L2b75-ENGL 2001 Lb24bb9 0895922 882 I Page
12、3 EN 12675:2000 1 Scope This European Standard specifies the functional safety requirements for traffic signal controllers. It is applicable to traffic signal control equipment permanently and temporarily installed, but excludes portable traffic control equipment. Traffic signal controllers, as defi
13、ned by this European Standard, are required to control conflicting traffic, both vehicular and pedestrian, e.g. junction signals, pedestrian crossings, shuttle signals, public transport signals, in a safe manner. The electrical safety requirements and additional traffic safety requirements, the inte
14、rfacing with external equipment and the test methods for verifymg compliance with this European Standard, are contained in HD 638. NOTE: National requirements may specify special conditions for public transport signals (PT) and for any other signal that is not specified in a European Standard. 2 Nor
15、mative references This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions
16、of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 12368, Trafic control equipment - Signal heads and poles. HD 638:1999, Road trafic signal systems.
17、3 Definitions For the purposes of this European Standard, the following definitions apply. 3.1 absent signal intended signal the luminous intensity of which does not comply with the signal “ON“ requirements as specified in HD 638:1999 3.2 bicycle signal traffic signal for the exclusive purpose of di
18、recting bicycle traffic at signalized locations 3.3 central control system for Co-ordinating and monitoring a network or group of traffic signals using a central computer, or equivalent device, and transmission systems 3.4 conflicting green (greenlgreen conflict) simultaneous display of green signal
19、s allowing conflicting traffic movements 3.5 conflicting signal groups two or more signal groups that will cause conflicting traffic movements if operated concurrently O BSI 02-2001 STD-BSI BS EH 12b75-ENGL 2001 W 1b24bb9 0895923 7Lq Page 4 EN 12675:2000 3.6 failure mode non-operational state of the
20、 traffic signal controller in which, as a result of a major fault, the normal operation mode is replaced with a flashing yellow or a signals off condition 3.7 green signal signal that is displayed to traffic having the colour “green“ as specified in EN 12368 3.8 major fault fault the occurrence of w
21、hich has the effect that the safe operation of the signal traffic system cannot be guaranteed as defined in the national requirements 3.9 manual operation mode operational state of the traffic signal controller in which the state of the signals to traffic is controlled manually by an operator 3.1 O
22、memory device means of storing information in a manner permitting its retrieval 3.1 I minor faults fault as defined in the national requirements, other than a major fault, that is capable of being identified and recorded 3.12 mode specific condition of a traffic signal controller used to control the
23、 signals to trafic. Examples are: - standby operation mode; - manual operation mode; - normal operation mode: -failure mode. 3.1 3 monitoring method of collecting information about the traffic signal controller including diagnostic checks used to detect a fault condition 3.14 national signal regulat
24、ion order and appearance of signal aspects, displayed to traffic, that are prescribed in national requirements 3.15 national signal sequence sequential order and appearance of signals, to traffic, to satisfy a specific national condition and/or application (e.g. signal start-up sequence) O BSI 02-20
25、01 STDmBSI BS EN 12b75-ENGL 2001 lb24bb9 0895924 la55 = Page 5 EN 12675:2000 3.16 normal operation mode any operational state of the traffic signal controller, other than failure mode, especially the operational state in which the signals are in accordance with the national signal regulation 3.1 7 p
26、edestrian signal traffic signal for the exclusive purpose of directing pedestrian traffic at signalized locations 3.1 8 portable traffic control equipment traffic signal control equipment designed for temporary applications and designed for easy transportation from one site to another 3.19 power sup
27、ply power source providing energy to an active device or circuit 3.20 public transport signals (PT) traffic signal for the exclusive purpose of directing public transport vehicles at signalized locations 3.21 red signal signal that is displayed to traffic having a colour “red” as specified in EN 123
28、68 3.22 safety timings time settings that, in the event of an error, can affect the safety of the traffic signal control equipment 3.23 shuttle signals set of traffic signals controlling a narrow section of road where traffic can only proceed in each direction alternatively 3.24 signal dynamic messa
29、ge supplied to road users 3.25 signal group group of signal heads that always receive identical signal light indications 3.26 signal head device which comprises one or more optical units, including the housing(s), together with all the mounting brackets, fixings, hoods, visors, cowls and background
30、screens, whose task is to convey a visual message to road users 3.27 standby operation mode operational state of the traffic signal controller in which a flashing yellow signal, or signals off condition, is permitted by the national signal regulation O BSI 02-2001 STD-BSI BS EN 22675-ENGL 2002 Page
31、6 EN 12675:2000 Lb24669 0895925 531 W 3.28 start-up sequence when requested under normal operation of the controller, it may be required to go through a controlled start-up sequence to change from the display of either “all signals off or “flashing yellow“ to normal operation mode 3.29 time settings
32、 all the time information relating to the traffic signal controller for a particular intersection 3.30 traffic control regulation of traffic by traffic signals or traffic signs 3.31 traffic signal controller equipment driving traffic signals 3.32 traffic signal control equipment traffic signal contr
33、oller, working together with the signal under control, and the associate interface equipment 3.33 unwanted signal unintended signal the luminous intensity of which does not comply with the signal “OFF requirements as specified in HD 638: 1999 3.34 yellow signal a signal that is displayed to traffic
34、having a colour “yellow“ as specified in EN 12368 4 Functional safety requirements 4.1 General This European Standard specifies the minimum safety requirements for traffic signal controllers to ensure the safe state of signals displayed to traffic. This safety consists of preventing a fault, or the
35、consequences of a fault, that could result in the display of information liable to present a hazard to road users. A hazard to road users is prevented by the ability of the traffic signal controller to detect a specified fault condition and to change to a safe state. The change to a safe state is de
36、termined by the ability of the traffic signal controller to respond to the occurrence of faults in accordance with clause 5. A fault condition may be dependent on the configuration of signal groups for specific application requirements. The specified fault condition shall be classified as a major or
37、 minor fault condition and acted on accordingly. Diagnostic checks shall be provided within the traffic signal controller for the detection of specified fault conditions. This is achieved by monitoring the appropriate: a) outputs; b) logic circuits; c) inputs. O BSI 02-2001 STD*BSI BS EN 12h75-ENGL
38、2OOL Lb24bb9 089592b 428 Page 7 EN 12675:2000 4.2 Application of power On application of power to the traffic signal controller, the controller shall undertake intemal checks to ensure that the operating programs start in a predefined condition. These checks shall ensure that all memories are initia
39、lized to their correct state and that all memory devices are checked. In the event of an error, the traffic signal controller shall not change to the control mode of operation. 4.3 Diagnostic checks of traffic signal controller logic system Diagnostic checks shall check the traffic signal controller
40、 logic system. The diagnostic check interval, and the action to be taken as a result of diagnostic checks, shall not be greater than 10 s. In the event of an error, the traffic signal controller shall change to the failure mode. 4.4 Classification of faults This European Standard defines the minimum
41、 specification for a traffic signal controller with respect to safety for the road user. This safety consists of avoiding the display of incorrect messages on signals that are liable to endanger road users (e.g. conflicting signals, missing or unwanted signals, wrong timing). The controller shall be
42、 capable of taking action as required by the selected class and taking into account the following: a) Where a class includes a “o“ there is no requirement to provide checks. Therefore, this European Standard does not specify the requirement to provide the function, the monitoring for the fault condi
43、tion or the action to be taken if the function is provided. b) For specified major and minor faults the traffic signal controller shall record the faulty signal group outputs, record the affected signals, and record the fault as specified in 5.4. c) For a traffic signal controller to comply with thi
44、s European Standard, it shall comply with the requirements to declare a fault class including a “1“ as follows: - For a traffic signal controller to comply with this European Standard, at least one of the classes AA1 , AEI as specified in 4.5.1 or AFI shall be declared. - For a traffic signal contro
45、ller to comply with this European Standard, class DAI as specified in 4.8 shall be declared, or at least one of the classes CAI, CBI , CC1 , or CDI as specified in clause 4.7.1, and class CE1 as specified in clause 4.7.2, shall be declared. d) The time interval for the traffic signal controller to d
46、etect the occurrence of a fault and change to a safe state shall be in accordance with HD 638: 1999, 5.2.2.3. e)The fault value of luminous intensity for an absent signal, signal “ON“ requirement of signal intensity for safety, shall be as specified in HD 638:1999, 5.2.1. f) The fault value of lumin
47、ous intensity for an unwanted signal, signal “OFF“ requirement of signal intensity for safety, shall be as specified in HD 638:1999, 5.2.1. 4.5 Conflict faults 4.5.1 Signal group conflicts (unwanted signals) The simultaneous display of configured conflicting signal groups shall have an effect accord
48、ing to one or more of the following classes: a) Green-green conflict Class MO: There is no requirement to check for conflicting green signals. O BSI 02-2001 Page 8 EN 12675:2000 Class AA1 : The occurrence of any signal group green signals displayed simultaneously with any conflicting signal group gr
49、een signals shall register a fault. b) Green-yellow conflict Class ABO: There is no requirement to check for conflicting green and yellow signals. Class ABI: The occurrence of any signal group green signals displayed simultaneously with any conflicting signal group yellow signais shall register a fault. c) Yellow-yellow conflict Class ACO: There is no requirement to check for conflicting yellow signals. Class AC1 : The occurrence of any signal group yellow signals displayed simultaneously with any conflicting signal group yellow signals shall register a fault. d) Gree
