This Standard specifies requirements and makes recommendations for the design, integration and validation of safety-related electrical, electronic and programmable electronic control systems (SRECS) for machines (see Notes 1 and 2). It is applicable to control systems used, either singly or in combination, to carry out safety-related control functions on machines that are not portable by hand while working, including a group of machines working together in a co-ordinated manner.
Note 1: In this standard, the term “electrical control systems” is used to stand for “Electrical, Electronic and Programmable Electronic (E/E/PE) control systems” and “SRECS” is used to stand for “safety-related electrical, electronic and programmable electronic control systems”.
Note 2: In this standard, it is presumed that the design of complex programmable electronic subsystems or subsystem elements conforms to the relevant requirements of IEC 61508. This standard provides a methodology for the use, rather than development, of such subsystems and subsystem elements as part of a SRECS.
This Standard is an application standard and is not intended to limit or inhibit technological advancement. It does not cover all the requirements (e.g. guarding, non-electrical interlocking or non-electrical control) that are needed or required by other standards or regulations in order to safeguard persons from hazards. Each type of machine has unique requirements to be satisfied to provide adequate safety.
This Standard:
— is concerned only with functional safety requirements intended to reduce the risk of injury or damage to the health of persons in the immediate vicinity of the machine and those directly involved in the use of the machine;
— is restricted to risks arising directly from the hazards of the machine itself or from a group of machines working together in a co-ordinated manner;
Note 3: Requirements to mitigate risks arising from other hazards are provided in relevant sector standards. For example, where a machine(s) is part of a process activity, the machine electrical control system functional safety requirements should, in addition, satisfy other requirements (e.g. GB/T 21109) insofar as safety of the process is concerned.
— does not specify requirements for the performance of non-electrical (e.g. hydraulic, pneumatic) control elements for machines;
Note 4: Although the requirements of this standard are specific to electrical control systems, the framework and methodology specified can be applicable to safety-related parts of control systems employing other technologies.
— does not cover electrical hazards arising from the electrical control equipment itself (e.g. electric shock, see GB 5226.1).
The objectives of specific Clauses in this Standard are as given in Table 2.
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2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 5226.1-2008 Electrical safety of machinery — Electrical equipment of machines — Part 1: General requirements (IEC 60204-1:2005, IDT)
GB/T 15706.1-2007 Safety of machinery — Basic concepts, general principles for design — Part 1: Basic terminology, methodology (ISO 12100-1:2003, IDT)
GB/T 15706.2-2007 Safety of machinery — Basic concepts, general principles for design — Part 2: Technical principles (ISO 12100-2:2003, IDT)
GB/T 16855.1-2008 Safety of machinery — Safety related parts of control systems — Part 1: General principles for design (ISO 13849-1:2006, IDT)
GB/T 16855.2-2007 Safety of machinery — Safety-related parts of control systems — Part 2: Validation (ISO 13849-2:2003, IDT)
GB/T 16856.1-2008 Safety of machinery — Principles of risk assessment (ISO 14121-1:2007, IDT)
GB/T 16856.2-2008 Safety of machinery — Safety-related parts of control systems — Part 2: Validation (ISO/TR 14121-2:2007, IDT)
GB/T 17799.2-2003 Electromagnetic compatibility — Generic standards — Immunity for industrial environments (IEC 61000-6-2:1999, IDT)
GB 18209.1-2010 Electrical safety of machinery — Indication, marking and actuation — Part 1: Requirements for visual, acoustic and tactile signals (IEC 61310-1:2007, IDT)
GB 18209.2-2010 Electrical safety of machinery — Indication marking and actuation — Part 2: Requirements for marking (IEC 61310-2:2007, IDT)
GB 18209.3-2010 Electrical safety of machinery — Indication, marking and actuation — Part 3: Requirements for the location and operation of actuators (IEC 61310-3:2007, IDT)
GB/T 20438.2-2006 Functional safety of electrical/electronic/programmable electronic safety-related systems D Part 2: Requirements for electrical/electronic/programmable electronic safety-related systems (IEC 61508-2:2000, IDT)
GB/T 20438.4-2006 Functional safety of electrical/electronic/programmable electronic safety-related systems D Part 4: Definitions and abbreviations (IEC 61508-4:1998, IDT)
GB/T 21109.1-2007 Functional safety — Safety instrumented systems for the process industry sector — Part 1: Framework definitions system hardware and software requirements (IEC 61511-1:2003, IDT)
IEC 61508-3 Functional safety of electrical/electronic/programmable electronic safety-related systems — Part 3: Software requirements
