BS EN 61784-1-2008 工业通信网络.轮廓.现场总线轮廓

National foreword This British Standard is the official UK implementation of EN 61784-1:2008. It is identical with IEC 61784-1:2007. It supersedes BS EN 61784-1:2004 which is withdrawn. Together with BS EN 61158-2, BS EN 61158-3-16, BS EN 61158-4-16, BS EN 61158-5-16 & BS EN 61158-6-16, it partially supersedes BS EN 61491:1999, which will be withdrawn upon publication of a revised edition currently in progress and which will be implemented as a Technical Report. The UK participation in its preparation was entrusted to Technical Committee AMT/7, Industrial communications: process measurement and control, including fieldbus. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. This European Standard was approved by CENELEC on 2008-05-01. 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, 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.