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GB/T 42125.18-2024Safety requirements for electrical equipment for measurement, control and laboratory use - Part 18: Particular requirements for control equipment (English PDF)

测量、控制和实验室用电气设备的安全要求第18部分：控制设备的特殊要求

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

November 28, 2024

Implementation date

December 1, 2025

Scope

GB/T 42125.18-2024 is the English-translated version of 测量、控制和实验室用电气设备的安全要求第18部分：控制设备的特殊要求.

GB/T 42125.18-2024 — Except for the following contents, Chapter 1 of GB/T 42125.1-2024 is applicable.

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Document preview — GB/T 42125.18-2024

National Standard of the People's Republic of China

ICS: 19.080; 25.040.01
Classification: N 09

Issued by: State Administration for Market Regulation, China National Standardization Administration

Preface
Introduction
1 Scope and purpose
2 Normative references
3 Terms and definitions
4 Experiment
5 Logo and Documentation
6 Protection against electric shock
7 Protection against mechanical hazards
8 Mechanical stress resistance
9 Prevent the spread of fire 20
10 Temperature limits and heat resistance of equipment
11 Protection against hazards from fluids and solid foreign matter
12 Protection against radiation (including laser sources), sound pressure and ultrasonic pressure
13 Protection against released gases and substances, explosions and implosions 27
14 Components and Assemblies 27
15 Protection using interlocking devices
16 Hazards caused by application
17 Risk Assessment 28
Appendix
Appendix E (Informative) Guidelines for reducing pollution levels
Appendix F (Normative) Routine test
Appendix AA (Informative) General Safety Plan for Control Equipment
Appendix BB (Informative) Isolation Boundary System Diagram
Appendix CC (Informative) Historical Technology of Secondary Circuits
Appendix DD (Normative) Flammability test for magnesium alloy fireproof enclosure or fire damper (see 9.3.2)
Appendix EE (Informative) Information/Documents and their relevance for use
Appendix FF (Informative) Measurement of electrical clearances and creepage distances
References

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

This document is part 18 of GB/T 42125 Safety requirements for electrical equipment for measurement, control and laboratory use.

The following parts have been published.

--- Part 1: General requirements;

--- Part 2: Particular requirements for laboratory equipment for material heating;

--- Part 3: Particular requirements for refrigeration equipment;

--- Part 4: Special requirements for climate and environmental tests and other temperature regulation equipment;

--- Part 5: Particular requirements for laboratory centrifuges;

--- Part 7: Safety requirements for hand-held and hand-operated probe assemblies for electrical measurement and test;

--- Part 10: Particular requirements for insulation resistance measurement and dielectric strength test equipment;

--- Part 14: Particular requirements for automatic and semi-automatic equipment for laboratory use for analytical and other purposes;

--- Part 17: Particular requirements for equipment used by children in educational institutions;

--- Part 18: Particular requirements for control equipment;

--- Part 19: Particular requirements for electric control valve actuators.

This document is equivalent to IEC 61010-2-201:2017 "Safety requirements for electrical equipment for measurement, control and laboratory use Part 2-201 Part 1: Special requirements for control equipment.

The following minimal editorial changes were made to this document.

--- In order to coordinate with the existing standards, the name of the standard is changed to "Safety Requirements for Electrical Equipment for Measurement, Control and Laboratory Use Part 18 Part 1: Special requirements for control equipment;

--- Deleted the informative Appendix L "Term Index".

Introduction

GB/T 42125 "Safety requirements for electrical equipment for measurement, control and laboratory use" is planned to consist of 20 parts.

--- Part 1: General requirements. The purpose is to specify the general safety requirements of electrical equipment for measurement, control and laboratory use and their accessories Require.

--- Part 2: Particular requirements for laboratory equipment for material heating. The purpose is to specify the special requirements for laboratory material heating equipment.

Security requirements.

--- Part 3: Particular requirements for refrigeration equipment. The purpose is to specify the special safety requirements for refrigeration equipment used in measurement, control and laboratories Require.

--- Part 4: Special requirements for climate and environmental tests and other temperature regulation equipment. The purpose is to specify climate and environmental tests Special safety requirements for testing and other temperature regulating equipment.

--- Part 5: Particular requirements for laboratory centrifuges. The purpose is to specify special safety requirements for laboratory centrifuges.

--- Part 6: Particular requirements for test and measuring circuits. The purpose is to specify special safety requirements for test and measuring circuits.

--- Part 7: Safety requirements for hand-held and hand-operated probe assemblies for electrical measurement and testing. The purpose is to specify the safety requirements for hand-held and hand-operated probe assemblies.

Safety requirements for head assemblies and related accessories.

--- Part 8: Particular requirements for hand-held and hand-operated current sensors for electrical measurement and testing. The purpose is to specify the requirements for hand-held and hand-operated current sensors.

Special safety requirements for current sensors.

--- Part 9: Particular requirements for household and professional hand-held multimeters capable of measuring mains voltage.

Particular safety requirements for hand-held multimeters for household and professional use for measuring mains supply voltage.

--- Part 10: Particular requirements for insulation resistance measurement and dielectric strength test equipment. The purpose is to specify the output voltage AC Safety requirements for equipment used for insulation resistance measurement and dielectric strength testing at 50V or DC 120V or above.

--- Part 11: Particular requirements for sterilizers and cleaning and disinfecting equipment for processing medical materials.

Particular safety requirements for sterilizers and washer-disinfectors.

--- Part 12: Particular requirements for laboratory mixing and stirring equipment. The purpose is to specify electric stirring and agitation equipment used for mechanical stirring and agitation.

Particular safety requirements for laboratory equipment and its accessories.

--- Part 13: Particular requirements for laboratory atomic spectrometers with thermal atomization and ionization. The purpose is to specify the requirements for laboratory atomic spectrometers with thermal atomization and ionization.

Particular safety requirements for atomic spectrometers for atomization and ionization.

--- Part 14: Particular requirements for automatic and semi-automatic equipment for laboratory analysis and other purposes. The purpose is to specify the Particular safety requirements for automatic and semi-automatic equipment for analytical and other purposes.

--- Part 15: Particular requirements for cabinet X-ray systems. The purpose is to specify special safety requirements for cabinet X-ray systems.

--- Part 16: Particular requirements for in vitro diagnostic (IVD) medical devices. The purpose is to specify the intended use for in vitro diagnostic medical purposes Special requirements for medical devices.

--- Part 17: Particular requirements for equipment used by children in educational institutions. The purpose is to specify the requirements for equipment used by student operators in educational institutions.

Particular safety requirements for equipment and accessories.

--- Part 18: Particular requirements for control equipment. The purpose is to specify the special requirements and related requirements for control equipment used in industrial environments identification test.

--- Part 19: Particular requirements for electric control valve actuators. The purpose is to specify the requirements for electric control valve actuators installed in industrial processes or discrete control Safety requirements for electric control valve actuators and solenoid coils in environments.

--- Part 20: Particular requirements for industrial communication circuits and communication port interconnections. The purpose is to specify the requirements for installation in process or discrete control Special safety requirements for industrial communication circuits in an environment.

Note. The correspondence between each part and the IEC 61010 series standards is as follows.

--- Part 1 corresponds to IEC 61010-1;

--- Part 2 corresponds to IEC 61010-2-010;

--- Part 3 corresponds to IEC 61010-2-011;

--- Part 4 corresponds to IEC 61010-2-012;

--- Part 5 corresponds to IEC 61010-2-020;

--- Part 6 corresponds to IEC 61010-2-030;

--- Part 7 corresponds to IEC 61010-031;

--- Part 8 corresponds to IEC 61010-2-032;

--- Part 9 corresponds to IEC 61010-2-033;

--- Part 10 corresponds to IEC 61010-2-034;

--- Part 11 corresponds to IEC 61010-2-040;

--- Part 12 corresponds to IEC 61010-2-051;

--- Part 13 corresponds to IEC 61010-2-061;

--- Part 14 corresponds to IEC 61010-2-081;

--- Part 15 corresponds to IEC 61010-2-091;

--- Part 16 corresponds to IEC 61010-2-101;

--- Part 17 corresponds to IEC 61010-2-130;

--- Part 18 corresponds to IEC 61010-2-201;

--- Part 19 corresponds to IEC 61010-2-202;

--- Part 20 corresponds to IEC 61010-2-203.

This document should be combined with GB/T 42125.1-2024 "Safety requirements for electrical equipment for measurement, control and laboratory use Part 1: General Requirements".

The part marked "Applicable" in this document indicates that the corresponding clauses of GB/T 42125.1-2024 apply to this document;

The part marked "replace" or "modify" indicates that the provisions of this document shall prevail. The part marked "add" in this document indicates that in addition to complying with in addition to the corresponding clauses of GB/T 42125.1-2024, the additional clauses in this document must also be complied with.

The clauses in GB/T 42125.1-2024 and the clauses added in this document are numbered starting with 101, for example 3.1.101, the appendix added in this document the numbering starts with AA, for example, Appendix AA, Appendix BB.

Safety requirements for electrical equipment for measurement, control and laboratory use Part 18: Particular requirements for control equipment

1 Scope and purpose

Except for the following contents, Chapter 1 of GB/T 42125.1-2024 is applicable.

1.1.1 Equipment to which this document applies

replace.

This document specifies the safety requirements and related qualification of any product that performs control equipment functions and/or their associated peripheral equipment in addition, these products are intended for use in controlling and commanding machines, automated manufacturing and industrial processes, such as discrete and continuous control.

The following are some examples.

---Programmable logic controller (PLC);

---Programmable Automation Controller (PAC);

---Distributed control system (DCS);

---Remote input and output (I/O);

---Programming and debugging tools (PADTs);

---Human-machine interface (HMI);

---Locator.

The above-specified equipment and components within the scope of this document are.

--- (Auxiliary) independent power supply;

---Peripheral devices such as digital and analog I/O, remote I/O;

---Industrial network equipment.

Control devices and their associated peripherals are intended for use in an industrial environment and may be supplied as open or closed equipment.

Note 1.Control equipment also intended to be used in other environments or for other purposes (for example. for use in building installations to control lighting or other electrical devices, or for cars, trains or ships), can have additional compliance requirements defined by safety standards based on these applications. These requirements may include such as. insulation, space and power limitations.

NOTE 2 Computing apparatus and similar equipment within the scope of IEC 60950 (intended to be replaced by IEC 62368) and complying with its requirements are considered suitable for use with this document.

However, some requirements of IEC 60950 for moisture and liquid resistance are not the same as those in GB/T 42125.1-2024.

Paragraph 2 of 5.4.4 is strict.

The control equipment covered by this document is intended for use in low voltage installations of overvoltage category II (IEC 60664-1). The rated supply voltage of the equipment is not exceeding AC effective value 1000V (50/60Hz), or DC 1000V.

The requirements of ISO/IEC Guide 51 and IEC Guide 104 that are relevant to this document have been included here.

1.1.2 Equipment not included in the scope of this document

This document does not cover the entire automation system, such as a complete assembly line. Control equipment (such as DCS and PLC), application of control equipment Programs and associated peripherals are considered to be components of the overall automation system (in this document, components cannot perform useful functions by themselves).

This document only considers the control equipment (such as DCS and PLC) as a component, and does not contribute to the safety of the entire automation system including installation and application.

These considerations are outside the scope of this document. For electrical installations and guidelines, refer to the IEC 60364 series of documents or appropriate national/local regulations.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 51 pages — is available in the English PDF.

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