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SAFETY MANUAL The TMR architecture provides a flexibility that allows each system to be easily adapted to the different needs of any installation. This flexibility permits the user to choose from different levels of I/O fault protection and provides a variety of I/O interfacing and communications methods, thereby allowing the system to communicate with other equipment and field devices. Those elements of the system that are to be used in safety-related operations are certified to IEC 61508 SIL 3, DIN –V –VDE 0801, AK6. The remaining elements of the system are certified for non-interfering operation. This manual covers the release as specified in the certified module list. Doc No P8094 Page 26 of 67 Issue 14 September 2003
SAFETY MANUAL 2. SAFETY PRINCIPLES 2.1 INTRODUCTION This paragraph provides an overview of generic safety principles with emphasis on the system integration process. These principles are applicable to all safety-related systems, including, but not limited to, the 8000 series system. 2.2 SAFETY MANAGEMENT A prerequisite for the achievement of functional safety is the implementation of procedural measures applicable to the safety lifecycle; these are collectively referred to as a Safety Management System. The Safety Management System defines the generic management and technical activities necessary for functional safety. In many cases, the Safety Management and Quality systems will be integrated within a single set of procedures. It is highly recommended that the integrator have a quality management system in accordance with ISO9000. The safety management system shall include: • A statement of the policy and strategy to achieving functional safety. • A Safety Planning Procedure. This shall result in the definition of the safety lifecycle stages to be applied, the measures and techniques to be applied at each stage, and responsibilities for completing these activities. • Definitions of the records to be produced and methods of managing these records, including change control. The change control procedures shall include records of modification requests, the impact analysis of proposed modifications and the approval of modifications. The baseline for change control shall be defined clearly. • Configuration items shall be uniquely identified and include version information, e.g. system and safety requirements, system design documentation and drawings, application software source code, test plans, test procedures and results. • Methods of ensuring that persons are competent to undertake their activities and fulfil their responsibilities. Expansion of these requirements is included within the following sub-paragraphs. Doc Number P8094 Issue 14 September 2003 Page 27 of 67
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