土方机械.功能安全.第2部分:控制系统安全相关部件硬件和结构要求的设计和评估

[中文适用范围]： 本文件规定了开发和评估安全控制系统 (SCS) 所达到的机器性能水平 (MPLa) 的一般原则，该安全控制系统使用由土方机械中使用的所有能源（例如电子、电气、液压、机械）供电的组件及其设备，如 ISO 6165 中所定义。 本文件的原则适用于控制机器运动或减轻危险的机器控制系统 (MCS)；此类系统根据所需的机器性能水平（MPLr）进行评估。 以下系统不包括在本文件的范围内： ——不影响机器运动的感知系统（例如摄像机和雷达探测器）； ——灭火系统，除非该系统的激活干扰或激活另一个 SCS。 本文件不包括操作员能够意识到故障的其他系统或组件（例如挡风玻璃雨刷、头灯等）或主要用于保护财产的其他系统或组件。 声音警告不包括在诊断覆盖范围的要求中。 此外，本文件还解决了 ISO 12100 中定义的由 SCS 内的硬件组件减轻的重大危险。 本文件不适用于其发布之日之前生产的 EMM。 [外文原描述]： This document specifies general principles for the development and evaluation of the machine performance level achieved (MPL a ) of safety-control systems (SCS) using components powered by all energy sources (e.g. electronic, electrical, hydraulic, mechanical) used in earth-moving machinery and its equipment, as defined in ISO 6165. The principles of this document apply to machine control systems (MCS) that control machine motion or mitigate a hazard; such systems are assessed for machine performance level required (MPL r ) per ISO 19014-1 or ISO/TS 19014-5. Excluded from the scope of this document are the following systems: — awareness systems that do not impact machine motion (e.g. cameras and radar detectors); — fire suppression systems, unless the activation of the system interferes with, or activates, another SCS. Other systems or components whereby the operator would be aware of failure (e.g. windscreen wipers, head lights, etc.), or are primarily used to protect property, are excluded from this document. Audible warnings are excluded from the requirements of diagnostic coverage. In addition, this document addresses the significant hazards as defined in ISO 12100 mitigated by the hardware components within the SCS. This document is not applicable to EMM manufactured before the date of its publication.