Road traffic signal systems

This European Standard specifies requirements for Road Traffic Signal Systems, including their development, design, testing, installation and maintenance. In particular, it forms the electrotechnical part of the following two standards issued by CEN: – EN 12368, Traffic control equipment ― Signal heads – EN 12675, Traffic signal controllers ― Functional safety requirements Each of these standards above should be used with this standard either singly or together to define an operational equipment or system. This should be achieved by using the electrotechnical methods and testing defined in this standard. Where Road Traffic Signal Systems are to be used with other systems, e.g. public lighting or railway signalling and communication, this standard should comply with the other respective standard to ensure that overall safety is not compromised. Only permanently or temporarily installed Road Traffic Signal Systems are included in this standard. Central office and portable signalling systems are not covered.


Diese Europäische Norm legt Anforderungen für Straßenverkehrs-Signalanlagen fest, einschließlich ihrer Entwicklung, Konstruktion, Prüfung, Errichtung und Instandhaltung. Insbesondere bildet sie den elektrotechnischen Teil der folgenden zwei von CEN herausgegebenen Normen: – EN 12368, Anlagen zur Verkehrssteuerung – Signalleuchten; – EN 12675, Steuergeräte für Lichtsignalanlagen – Funktionale Sicherheitsanforderungen. Jede der angegebenen Normen muss mit dieser Norm entweder einzeln oder zusammen angewendet werden, um ein betriebsfähiges Gerät oder eine betriebsfähige Anlage festzulegen. Dazu müssen die in der vorliegenden Norm festgelegten elektrotechnischen Methoden und Prüfungen angewendet werden. Wenn Straßenverkehrs-Signalanlagen in Verbindung mit anderen Anlagen betrieben werden, z. B. Straßen¬beleuchtung oder Eisenbahnsignal- und kommunikationstechnik, müssen die Anforderungen dieser Norm mit den entsprechenden Normen übereinstimmen, damit die Sicherheit des Gesamtsystems nicht beeinträchtigt wird. Die vorliegende Norm gilt nur für fest oder vorübergehend errichtete Straßenverkehrs-Signalanlagen. Zentrale und ortsveränderliche Signalanlagen werden nicht behandelt.

Systèmes de signaux de circulation routière

La présente Norme Européenne définit les exigences pour les systèmes de signaux de circulation routière, et comprend leur étude, leur conception, leurs essais, leur installation et leur maintenance. En particulier, elle constitue la partie électrotechnique des deux normes suivantes publiées par le CEN: – EN 12368, Equipement de régulation du trafic ― Signaux – EN 12675, Contrôleurs de signaux de circulation routière ― Exigences de sécurité fonctionnelle Il convient que chacune des normes ci-dessus soit utilisée avec la présente norme, soit individuellement soit ensemble, pour définir un équipement ou un système opérationnel. Pour ce faire, il convient d’utiliser les méthodes et essais électrotechniques définis dans la présente norme. Lorsque les systèmes de signaux de circulation routière sont utilisés avec d’autres systèmes tels que ceux d’éclairage public, de signalisation ferroviaire et de télécommunications, il convient que cette norme soit conforme à l’autre norme correspondante afin d’assurer que la sécurité de l’ensemble ne soit pas compromise. Seuls les systèmes de signaux de circulation routière installés de façon permanente ou temporaire sont compris dans la présente norme. Les postes centraux et les systèmes de signalisation portables ne sont pas couverts.

Sistemi prometne signalizacije

Ta evropski standard določa zahteve za sisteme prometne signalizacije, vključno z njihovim razvojem, načrtovanjem, preskušanjem, vgradnjo in vzdrževanjem.
Predvsem tvori elektrotehnični del naslednjih dveh standardov, ki jih je izdal CEN:
- EN 12368, oprema za nadzor prometa – signalne glave,
- EN 12675, nadzorniki prometnih signalov – zahteve za funkcionalno varnost.
Vsak od zgornjih standardov se mora uporabljati s tem standardom, posamično ali skupaj, za določanje delovne opreme ali sistema. To naj se doseže z uporabo elektrotehničnih metod in preskušanja, določenega v tem standardu.
Kjer se sistemi prometne signalizacije uporabljajo z drugimi sistemi, kot so npr. javna razsvetljava, železniška signalizacija in komunikacija, mora biti ta standard v skladu z drugim tovrstnim standardom, da zagotovi celotno varnost.
V ta standard so vključeni samo stalni ali začasno postavljeni sistemi prometne signalizacije. Osrednji pisarniški in prenosni signalni sistemi niso zajeti.

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Standards Content (Sample)

SIST EN 50556:2011
SIST HD 638 S1:2002
SIST HD 638 S1:2002/A1:2007
Sistemi prometne signalizacije
Road traffic signal systems
Systèmes de signaux de circulation routière
Ta slovenski standard je istoveten z: EN 50556:2011
93.080.30 Cestna oprema in pomožne Road equipment and
naprave installations
SIST EN 50556:2011 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50556:2011

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SIST EN 50556:2011

EN 50556

February 2011

ICS 93.080.30 Supersedes HD 638 S1:2001 + A1:2006

English version

Road traffic signal systems

Systèmes de signaux de circulation Straßenverkehrs-Signalanlagen

This European Standard was approved by CENELEC on 2011-01-02. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia,
Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50556:2011 E

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SIST EN 50556:2011
EN 50556:2011 - 2 -

This European Standard was prepared by CENELEC Task Force BTTF 69-3, Road traffic signal systems.

The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as
EN 50556 on 2011-01-02.

This document supersedes HD 638 S1:2001 + A1:2006.

The main changes with respect to HD 638 S1:2001 + A1:2006 are the following:

− update of the normative-references;

− editorial revision;

− reduction of the classes;

− adaptation to the level of technology.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights.
The following dates were fixed:

– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2012-01-02

– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-01-02


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SIST EN 50556:2011
- 3 - EN 50556:2011
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Electrical supply and limits . 10
4.1 Nominal voltages . 10
4.2 Operating voltage range . 10
4.3 Low voltage . 11
4.4 Overvoltage .

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