1 Scope
1.1 This part of GB/T 20438 contains the definitions and explanation of terms that are used in GB/T 20438.1~GB/T 20438.7.
1.2 The definitions are grouped under general headings so that related terms can be understood within the context of each other. However, it should be noted that these headings are not intended to add meaning to the definitions.
1.3 GB/T 20438.1, GB/T 20438.2, GB/T 20438.3 and GB/T 20438.4 are basic safety publications, although this status does not apply in the context of low complexity E/E/PE safety-related systems (see 3.4.3 of GB/T 20438.4-2017). As basic safety publications, they are intended for use by technical committees in the preparation of standards in accordance with the principles contained in IEC Guide 104 and ISO/IEC Guide 51. GB/T 20438.1, GB/T 20438.2, GB/T 20438.3 and GB/T 20438.4 are also intended for use as stand-alone publications. The horizontal safety function of GB/T 20438 does not apply to medical equipment in compliance with the IEC 60601 series.
1.4 One of the responsibilities of a technical committee is, wherever applicable, to make use of basic safety publications in the preparation of its publications. In this context, the requirements, test methods or test conditions of this basic safety publication will not apply unless specifically referred to or included in the publications prepared by those technical committees.
1.5 Figure 1 shows the overall framework of the GB/T 20438 series and indicates the role that this part plays in the achievement of functional safety for E/E/PE safety-related systems.
Foreword II
Introduction IV
1 Scope
2 Normative References
3 Definitions and Abbreviations
3.1 Safety Terms
3.2 Equipment and Devices
3.3 Systems - General Aspects
3.4 Systems - Safety-related Aspects
3.5 Safety Functions and Safety Integrity
3.6 Fault, Failure and Error (see Figure 4)
3.7 Lifecycle Activities
3.8 Confirmation of Safety Measures
Bibliography
Index
Figure 1 Overall Framework of the GB/T 20438 Series
Figure 2 Programmable Electronic System
Figure 3 Electrical/Electronic/Programmable Electronic System (E/E/PE System) - Structure and Terminology
Figure 4 Failure Model
Table 1 Abbreviations Used in GB/T 2
1 Scope
1.1 This part of GB/T 20438 contains the definitions and explanation of terms that are used in GB/T 20438.1~GB/T 20438.7.
1.2 The definitions are grouped under general headings so that related terms can be understood within the context of each other. However, it should be noted that these headings are not intended to add meaning to the definitions.
1.3 GB/T 20438.1, GB/T 20438.2, GB/T 20438.3 and GB/T 20438.4 are basic safety publications, although this status does not apply in the context of low complexity E/E/PE safety-related systems (see 3.4.3 of GB/T 20438.4-2017). As basic safety publications, they are intended for use by technical committees in the preparation of standards in accordance with the principles contained in IEC Guide 104 and ISO/IEC Guide 51. GB/T 20438.1, GB/T 20438.2, GB/T 20438.3 and GB/T 20438.4 are also intended for use as stand-alone publications. The horizontal safety function of GB/T 20438 does not apply to medical equipment in compliance with the IEC 60601 series.
1.4 One of the responsibilities of a technical committee is, wherever applicable, to make use of basic safety publications in the preparation of its publications. In this context, the requirements, test methods or test conditions of this basic safety publication will not apply unless specifically referred to or included in the publications prepared by those technical committees.
1.5 Figure 1 shows the overall framework of the GB/T 20438 series and indicates the role that this part plays in the achievement of functional safety for E/E/PE safety-related systems.
Contents of GB/T 20438.4-2017
Foreword II
Introduction IV
1 Scope
2 Normative References
3 Definitions and Abbreviations
3.1 Safety Terms
3.2 Equipment and Devices
3.3 Systems - General Aspects
3.4 Systems - Safety-related Aspects
3.5 Safety Functions and Safety Integrity
3.6 Fault, Failure and Error (see Figure 4)
3.7 Lifecycle Activities
3.8 Confirmation of Safety Measures
Bibliography
Index
Figure 1 Overall Framework of the GB/T 20438 Series
Figure 2 Programmable Electronic System
Figure 3 Electrical/Electronic/Programmable Electronic System (E/E/PE System) - Structure and Terminology
Figure 4 Failure Model
Table 1 Abbreviations Used in GB/T 2
