GB/T 20438.4-2017 PDF in English
GB/T 20438.4-2017 (GB/T20438.4-2017, GBT 20438.4-2017, GBT20438.4-2017)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Name of Chinese Standard | Status |
| GB/T 20438.4-2017 | English | 415 |
Add to Cart
|
0-9 seconds. Auto-delivery.
|
Functional safety of electrical/electronic/programmable electronic safety-related systems -- Part 4: Definitions and abbreviations
| Valid |
| GB/T 20438.4-2006 | English | 959 |
Add to Cart
|
4 days
|
Functional safety of electrical/electronic/programmable electronic safety-related systems -- Part 4: Definitions and abbreviations
| Obsolete |
Standards related to (historical): GB/T 20438.4-2017
PDF Preview
GB/T 20438.4-2017: PDF in English (GBT 20438.4-2017) GB/T 20438.4-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 25.040
N 10
GB/T 20438.4-2017 / IEC 61508-4:2010
Replacing GB/T 20438.4-2006
Functional safety of electrical / electronic /
programmable electronic safety-related systems -
Part 4: Definitions and abbreviations
(IEC 61508-4:2010, IDT)
Foreword ... 4
Introduction ... 6
1 Scope ... 9
2 Normative references ... 10
3 Definitions and abbreviations ... 11
3.1 Safety terms ... 12
3.2 Equipment and devices ... 14
3.3 Systems - general aspects ... 19
3.4 Systems - safety-related aspects ... 22
3.5 Safety functions and safety integrity ... 24
3.6 Fault, failure and error (see Figure 4) ... 28
3.7 Lifecycle activities... 36
3.8 Confirmation of safety measures ... 37
Bibliography ... 42
Index ... 44
ISSUED ON: DECEMBER 29, 2017
IMPLEMENTED ON: JULY 01, 2018
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 4
Introduction ... 6
1 Scope ... 9
2 Normative references ... 10
3 Definitions and abbreviations ... 11
3.1 Safety terms ... 12
3.2 Equipment and devices ... 14
3.3 Systems - general aspects ... 19
3.4 Systems - safety-related aspects ... 22
3.5 Safety functions and safety integrity ... 24
3.6 Fault, failure and error (see Figure 4) ... 28
3.7 Lifecycle activities... 36
3.8 Confirmation of safety measures ... 37
Bibliography ... 42
Index ... 44
Foreword
GB/T 20438 "Functional safety of electrical/electronic/programmable electronic
safety-related systems" consists of the following seven parts:
- Part 1: General requirements;
- Part 2: Requirements for electrical/electronic/programmable electronic
safety-related systems;
- Part 3: Software requirements;
- Part 4: Definitions and abbreviations;
- Part 5: Examples of methods for the determination of safety integrity levels;
- Part 6: Guidelines on the application of GB/T 20438.2 and GB/T 20438.3;
- Part 7: Overview of techniques and measures.
This Part is Part 4 of GB/T 20438.
This Part was drafted in accordance with the rules given in GB/T 1.1-2009.
This Part replaces GB/T 20438.4-2006 "Functional safety of
electrical/electronic/programmable electronic safety-related systems - Part 4:
Definitions and abbreviations". Compared with GB/T 20438.4-2006, the main
technical changes in this Part are as follows:
- add the term and definition of "software on-line support tool" (see 3.2.10
and 3.2.11);
- add the term and definition of "application specific integrated circuit" (see
3.2.15);
- add the terms and definitions of "systematic safety integrity" and
"systematic capability" (see 3.5.6 and 3.5.9);
- add the terms and definitions of "no part failure" and "no effect failure" (see
3.6.13 and 3.6.14);
- add the terms and definitions of "mean time to restoration" and "mean repair
time" (see 3.6.21 and 3.6.22).
This Part uses translation method to identically adopt IEC 61508-4:2010
"Functional safety of electrical/electronic/programmable electronic safety-
related systems - Part 4: Definitions and abbreviations".
Functional safety of electrical / electronic /
programmable electronic safety-related systems -
Part 4: Definitions and abbreviations
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.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
|