This document specifies the concept phase of the development of safety-related parts of control systems (SRP\/CS) on tractors used in agriculture and forestry and on self-propelled ride-on machines and mounted, semi-mounted and trailed machines used in agriculture. It can also be applied to mobile municipal equipment (such as street-sweeping machines). This document is not applicable to: \u2014 aircraft and air-cushion vehicles used in agriculture; \u2014 lawn and garden equipment. This document specifies the characteristics and categories required of SRP\/CS for carrying out their safety-related functions. It does not identify performance levels for specific applications. NOTE 1 Machine specific type-C standards can specify performance levels (AgPL) for safety-related functions in machines within their scope. Otherwise, the specification of AgPL is the responsibility of the manufacturer. This document is applicable to the safety-related parts of electrical\/electronic\/programmable electronic systems (E\/E\/PES), as these relate to mechatronic systems. It covers the possible hazards caused by malfunctioning behaviour of E\/E\/PES safety-related systems, including interaction of these systems. It does not address hazards related to electric shock, fire, smoke, heat, radiation, toxicity, flammability, reactivity, corrosion, release of energy, and similar hazards., unless directly caused by malfunctioning behaviour of E\/E\/PES safety-related systems. It also covers malfunctioning behaviour of E\/E\/PES safety-related systems involved in protection measures, safeguards, or safety-related functions in response to non-E\/E\/PES hazards. Examples included within the scope of this document: \u2014 SRP\/CS’s limiting current flow in electric hybrids to prevent insulation failure\/shock hazards; \u2014 electromagnetic interference with the SRP\/CS; \u2014 SRP\/CS’s designed to prevent fire. Examples not included within the scope of this document: \u2014 insulation failure due to friction that leads to electric shock hazards; \u2014 nominal electromagnetic radiation impacting nearby machine control systems; \u2014 corrosion causing electric cables to overheat. This document is not applicable to non-E\/E\/PES systems (such as hydraulic, mechanic or pneumatic). NOTE 2 See also ISO 12100 for design principles related to the safety of machinery. This document is not applicable to safety-related parts of control systems manufactured before the date of its publication.<\/p>\n
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| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | Annex ZA (informative)Relationship between this European Standard and the essential requirements of Directive 2006\/42\/EC aimed to be covered <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | Foreword <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | Introduction <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 1 Scope <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 2 Normative references 3 Terms and definitions 4 Abbreviated terms <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 5 Concept \u2014 UoO 5.1 Objectives 5.2 Prerequisites 5.3 Requirements 5.3.1 Basic requirements and ambient conditions <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 5.3.2 Limits of UoO and its interfaces with other UoO 5.3.3 Mapping and allocation of relevant functions to involved UoO, sources of stress 5.3.4 Additional determinations 5.4 Work products <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 6 HARA \u2014 Determination of the AgPLr 6.1 Objectives 6.2 Prerequisites 6.3 Requirements 6.3.1 Procedures for preparing a HARA 6.3.2 Tasks in the HARA 6.3.3 Participants in HARA 6.3.4 Classification of a potential harm <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 6.3.5 Classification of exposure in the situation observed 6.3.6 Classification of a possible avoidance of harm <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 6.3.7 Selecting the AgPLr <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 6.4 Work products 7 Functional safety concept 7.1 Objectives 7.2 Prerequisites 7.3 Requirements 7.3.1 Safety goals 7.3.2 Functional safety requirements <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 7.3.3 Value of MTTFD 7.3.4 Value of DC 7.3.5 Selection of categories, MTTFDC, DC and SRL <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 7.3.6 Achieving the AgPLr <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 7.3.7 Compatibility with other functional safety standards 7.3.8 Joining E\/E\/PES 7.3.9 Alternate combinations of SRP\/CS to achieve overall AgPL 7.4 Work products <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | Annex A (normative) Designated architectures for SRP\/CS <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Annex B (informative) Simplified method to estimate channel MTTFDC <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | Annex C (informative) Determination of diagnostic coverage (DC) <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | Annex D (informative) Estimates for common-cause failure (CCF) <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | Annex E (informative) Systematic failure <\/td>\n<\/tr>\n | ||||||
| 50<\/td>\n | Annex F (informative) Characteristics of safety-related functions that are often fundamental to risk reduction <\/td>\n<\/tr>\n | ||||||
| 53<\/td>\n | Annex G (informative) Example of a risk analysis <\/td>\n<\/tr>\n | ||||||
| 58<\/td>\n | Annex H (normative) Compatibility with other functional safety standards <\/td>\n<\/tr>\n | ||||||
| 60<\/td>\n | Annex I (informative) Joined systems alternative compliance method <\/td>\n<\/tr>\n | ||||||
| 61<\/td>\n | Annex J (normative) Alternate combinations of SRP\/CS to achieve overall AgPL <\/td>\n<\/tr>\n | ||||||
| 63<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Tractors and machinery for agriculture and forestry. Safety-related parts of control systems – Concept phase<\/b><\/p>\n |