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GB/T 16754-2021   Safety of machinery—Emergency stop function—Principles for design (English Version)
Standard No.: GB/T 16754-2021 Status:to be valid remind me the status change

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Word Count: 8500 words Price(USD):200.0 remind me the price change

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Implemented on:2021-12-1 Delivery: via email in 1 business day
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Standard No.: GB/T 16754-2021
English Name: Safety of machinery—Emergency stop function—Principles for design
Chinese Name: 机械安全 急停功能 设计原则
Chinese Classification: J09    Hygiene, safety and labor protection
Professional Classification: GB    National Standard
Issued by: SARM AND SAC
Issued on: 2021-05-21
Implemented on: 2021-12-1
Status: to be valid
Superseding:GB 16754-2008 Safety of machinery - Emergency stop - Principles for design
Language: English
File Format: PDF
Word Count: 8500 words
Price(USD): 200.0
Delivery: via email in 1 business day
Safety of machinery - Emergency stop function - Principles for design 1 Scope This document specifies functional requirements and design principles for the emergency stop function on machinery, independent of the type of energy used. The requirements for this document apply to all machines, with exception to: ——machines where an emergency stop would not reduce the risk; ——hand-held or hand-operated machines. It does not deal with functions such as reversal or limitation of motion, deflection of emissions (e.g. radiation, fluids), shielding, braking or disconnecting, which can be part of the emergency stop function. Note: The requirements for the realization of the emergency stop function based on electrical/electronic technology are described in IEC 60204-1. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 15706-2012 Safety of machinery - General principles for design - Risk assessment and risk reduction (ISO 12100:2010, IDT) ISO 4413 Hydraulic fluid power - General rules and safety requirements for systems and their components ISO 4414 Pneumatic fluid power - General rules and safety requirements for systems and their components ISO 13849-1 Safety of machinery - Safety-related parts of control systems - Part 1: General principles for design IEC 60204-1:2005 Safety of machinery - Electrical equipment of machines - Part 1: General requirements IEC 60947-5-5:2005 Low-voltage switchgear and controlgear - Part 5-5: Control circuit devices and switching elements - Electrical emergency stop devices with mechanical latching function IEC 62061 Safety of machinery - Functional safety of safety- related electrical, electronic and programmable electronic control systems 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 15706-2012 and the following apply. 3.1 emergency stop(E-stop) emergency stop function function which is intended to ——avert arising or reduce existing hazards to persons, damage to machinery or to work in progress, and; ——be initiated by a single human action. [Source: GB/T 15706-2012, 3.40] 3.2 emergency stop equipment safety related parts of a control system which perform the emergency stop function Note: Typically emergency stop equipment is divided into input, processing and output elements. 3.3 emergency stop device manually actuated control device used to initiate an emergency stop function [Source: IEC 60947-5-5:2005, 3.2] 3.4 machine actuator power mechanism of the machine used to effect motion Note: Example of machine actuators are motor, solenoid, pneumatic or hydraulic cylinder. 3.5 safety function function of a machine whose failure can result in an immediate increase of risk(s) [Source: GB/T 15706-2012,3.30] 3.6 span of control of emergency stop device(s) predetermined section of the machinery under control of specific emergency stop device(s) 3.7 protective shroud mechanical measure provided to reduce the possibility of unintended actuation of an emergency stop device 3.8 emergency situation hazardous situation needing to be urgently ended or averted Note: An emergency situation can arise during normal operation of the machine (for example due to human interaction or as a result of external influences) or as a consequence of a malfunction or failure of any part of the machine. [Source: GB/T 15706-2012, 3.38, modified] 3.9 operator control station assembly of one or more control actuators fixed on the same panel or located in the same enclosure Note: Actuator is a part of a device to which an external manual action is to be applied (see IEC 60204-1:2005, 3.1). [Source: IEC 60204-1:2005, 3.13, modified] 4 Safety requirements 4.1 General 4.1.1 Emergency stop function 4.1.1.1 The purpose of the emergency stop function is to avert actual or impending emergency situations arising from the behaviour of persons or from an unexpected hazardous event. The emergency stop function is to be initiated by a single human action. 4.1.1.2 The emergency stop function shall be available and operational at all times. It shall override all other functions and operations in all operating modes of the machine without impairing other protective functions (e.g. release of trapped persons, fire suppression). When the emergency stop function is activated: ——it shall be maintained until it is manually reset; ——it shall not be possible for any start command to be effective on those operations stopped by the initiation of the emergency stop function. The emergency stop function shall be reset by intentional human action. Resetting of the emergency stop function shall be operated by disengagement of an emergency stop device (see 4.1.4). The reset shall not initiate machine start up. Note: The emergency stop function cannot be considered as measure of prevention of unexpected start up as described in GB/T 15706-2012. 4.1.1.3 The emergency stop function is a complementary protective measure and shall not be applied as a substitute for safeguarding measures and other functions or safety functions. 4.1.1.4 The emergency stop function shall not impair the effectiveness of other safety functions. Note: For this purpose, it can be necessary to ensure the continuing operation of auxiliary equipment such as magnetic chucks or braking devices. 4.1.1.5 The emergency stop function shall be so designed, that after actuation of the emergency stop device, hazardous movements and operations of the machine are stopped in an appropriate manner, without creating additional hazards and without any further intervention. Note: An "appropriate manner" can include: ——choice of an optimal deceleration rate taking into account the necessary design restraints of the machine; ——selection of the stop category (see 4.1.3); ——necessity for a predetermined shutdown sequence. Depending on the machine and the specific risks, the emergency stop function can initiate other functions other than stopping to minimize the risk of harm (e.g. reversal or limitation of motion, rate of braking) which can be part of the emergency stop function but not dealt with in this Standard. 4.1.1.6 The emergency stop function shall be so designed that a decision to activate the emergency stop device does not require the consideration of the resultant effects. 4.1.2 Span of control of emergency stop device(s) The span of control of each emergency stop device shall cover the whole machine. As an exception, a single span of control may not be appropriate when, for example, stopping all linked machinery could create additional hazards or unnecessarily affect production. Each span of control can cover section(s) of a machine, an entire machine or a group of machines (see Figure 1). Different spans of control may overlap. The assignment of spans of control shall be determined taking into account the following: a) the physical layout of the machine, based on the visible area of the machine; b) the possibility to recognize hazardous situations (e.g. visibility, noise, odour); c) any safety implications relating to the production process; d) the foreseeable exposure to hazards; e) the possible adjacent hazards. 4.1.2.1 More than one span of control can be applied, if the following requirements are met: ——the spans of control shall be clearly defined and identifiable; ——emergency stop devices shall be readily associated with the hazard requiring an emergency stop; ——the span of control of an emergency stop device shall be identifiable at the operating position of each emergency stop device (see also 4.1.1.6). Note: The clear identification could be realized by pictogram or by the location itself. Reading text or instructions associated to the emergency stop device or requiring prior knowledge should be avoided. Example: Such pictogram could be place next to an emergency stop device and would indicate the span of control of the device itself. ——actuation of an emergency stop device shall not create additional hazard(s) or increase the risk(s), in any span of control; ——actuation of an emergency stop device in one span of control shall not prevent the initiation of an emergency stop function in another span of control; ——information for use of the machine shall include information on the span of control of emergency stop device. So far as practicable, emergency stop devices with different spans of control shall not be located near each other. Key: 1——emergency stop device; 2——span of control; 3——section of machine or machine. Figure 1 Examples demonstrating the concept of span of control 4.1.3 Stop categories The emergency stop shall function in accordance with either of the following stop categories (see also IEC 60204-1). The relevant stop category shall be selected by the risk assessment. Stop category 0 Stopping by immediate removal of power to the machine actuators. Note 1: Additional braking can be necessary. Examples of stop category 0 are: ——switching off the electrical power to the electric motor(s) of the machine by electromechanical switching devices; ——mechanical disconnection (declutching) between the hazardous elements and their machine actuator(s); ——blocking the fluid power supply to the hydraulic/pneumatic machine actuators; ——removing the power needed to generate a torque or force in an electrical motor using the Safe torque off (STO) function of a power drive system in accordance with IEC 61800-5-2. Stop category 1 Stopping movements and operations with power available to the machine actuators to achieve the stop and then removal of power when the stop is achieved. Examples of stop category 1 are: ——deceleration of motion then removal of the electrical power to the motor(s) when motion has ceased by electromechanical switching devices; ——using the Safe stop 1 (SS1) function of a power drive system in accordance with IEC 61800-5-2. Note 2: For removal of power, it can be sufficient to remove the power needed to generate a torque or force. This can be achieved by declutching, disconnecting, switching off, or by electronic means (e.g. a Power Drive System (PDS) in accordance with IEC 61800-5-2), without necessarily performing isolation. 4.1.4 Disengagement (e.g. unlatching) of the emergency stop device The effect of an activated emergency stop device shall be sustained until the actuator of the emergency stop device has been disengaged. This disengagement shall only be possible by an intentional human action on the device where the command has been initiated. The disengagement of the device shall not restart the machinery but only permit restarting. The instructions for use of the machine shall state that, after actuation and before disengaging the device(s), the machinery shall be inspected in order to detect the reason for actuation.
Foreword I Introduction III 1 Scope 2 Normative references 3 Terms and definitions 4 Safety requirements 4.1 General 4.2 Operating conditions, environmental influences 4.3 Emergency stop device 4.4 Use of wires or ropes as actuators 4.5 Prevention of unintended actuation of an emergency stop device 4.6 Portable operator control stations Bibliography
Referred in GB/T 16754-2021:
*GB/T 15706-2012 Safety of machinery — General principles for design - Risk assessment and risk reduction
*GB/T 95-2002 Plain washers - Product grade C
*GB/T 2664-2009 Mens suits and coats
*GB 4706.1-2005 Household and Similar Electrical Appliances – Safety - Part 1: General Requirements
*GB 17625.1-2022 Electromagnetic compatibility—Limits—Part 1: Limits for harmonic current emissions (equipment input current ≤ 16A per phase)
*GB/T 14048.5-2017 Low-voltage switchgear and controlgear-Part 5-1:Control circuit devices and switching element-Electromechanical control circuit devices
*GB 17625.1-2022 Electromagnetic compatibility—Limits—Part 1: Limits for harmonic current emissions (equipment input current ≤ 16A per phase)
*QB/T 1333-2018 Handbag and Knapsack
*GB 2762-2022 National Food Safety Standard - Maximum Levels of Contaminants in Foods
*GB/T 22849-2014 Knitted T-shirt
*GB 5749-2022 Standards for drinking water quality
*GB 14748-2006 Safety Requirements for Wheeled Child Conveyances
*GB/T 1591-2018 High strength low alloy structural steels
*GB 4943.1-2011 Information technology equipment -Safety - Part 1: General requirements
*GB 2763-2021 National Food Safety Standard-Maximum Residue Limits for Pesticides in Food
*GB/T 35590-2017 Information technology―General specification for portable digital equipments used power bank
*QB/T 1858-2004 Perfume and cologne
*HG/T 20592-2009 Stee1 Pipe F1anges (PN designated)
*GB 3565-2005 Safety requirements for bicycles
*GB/T 39335-2020 Information security technology—Guidance for personal information security impact assessment
*GA 374-2019 Burglary-resistant electronic locks
*GB/T 19001-2016 Quality management systems―Requirements
*GB 4943.1-2022 Audio/video,information and communication technology equipment—Part 1: Safety requirements
*GB 4806.7-2016 National Food Safety Standard - Food Contact Plastic Materials and Articles
*GB/T 35590-2017 Information technology―General specification for portable digital equipments used power bank
*GB 150-2011 Pressure Vessels (Collection GB150.1~150.4-2011)
*GB/T 5750-2006 Standard examination methods for drinking water
*JB/T 10391-2008 Specification for Yseries(IP44)three asynchronous motor (Frame size 80~355)
*GB 14880-2012 National Food Safety Standard for the Use of Nutritional Fortification Substances in Foods
*GB 9706.1-2020 Medical electrical equipment—Part 1: General requirements for basic safety and essential performance
GB/T 16754-2021 is referred in:
*GB 19815-2021 Centrifuge—Safety requirements
*GB 40161-2021 Filters—Safety requirements
*GB 17957-2021 Rock drilling machines and pneumatic tools—Safety requirements
*GB/T 30574-2021 Safety of machinery—Implementation criteria for safeguarding
*GB/T 41975-2022 Ink-jet digital printing press for books and periodicals
Code of China
Standard
GB/T 16754-2021  Safety of machinery—Emergency stop function—Principles for design (English Version)
Standard No.GB/T 16754-2021
Statusto be valid
LanguageEnglish
File FormatPDF
Word Count8500 words
Price(USD)200.0
Implemented on2021-12-1
Deliveryvia email in 1 business day
Detail of GB/T 16754-2021
Standard No.
GB/T 16754-2021
English Name
Safety of machinery—Emergency stop function—Principles for design
Chinese Name
机械安全 急停功能 设计原则
Chinese Classification
J09
Professional Classification
GB
ICS Classification
Issued by
SARM AND SAC
Issued on
2021-05-21
Implemented on
2021-12-1
Status
to be valid
Superseded by
Superseded on
Abolished on
Superseding
GB 16754-2008 Safety of machinery - Emergency stop - Principles for design
Language
English
File Format
PDF
Word Count
8500 words
Price(USD)
200.0
Keywords
GB/T 16754-2021, GB 16754-2021, GBT 16754-2021, GB/T16754-2021, GB/T 16754, GB/T16754, GB16754-2021, GB 16754, GB16754, GBT16754-2021, GBT 16754, GBT16754
Introduction of GB/T 16754-2021
Safety of machinery - Emergency stop function - Principles for design 1 Scope This document specifies functional requirements and design principles for the emergency stop function on machinery, independent of the type of energy used. The requirements for this document apply to all machines, with exception to: ——machines where an emergency stop would not reduce the risk; ——hand-held or hand-operated machines. It does not deal with functions such as reversal or limitation of motion, deflection of emissions (e.g. radiation, fluids), shielding, braking or disconnecting, which can be part of the emergency stop function. Note: The requirements for the realization of the emergency stop function based on electrical/electronic technology are described in IEC 60204-1. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 15706-2012 Safety of machinery - General principles for design - Risk assessment and risk reduction (ISO 12100:2010, IDT) ISO 4413 Hydraulic fluid power - General rules and safety requirements for systems and their components ISO 4414 Pneumatic fluid power - General rules and safety requirements for systems and their components ISO 13849-1 Safety of machinery - Safety-related parts of control systems - Part 1: General principles for design IEC 60204-1:2005 Safety of machinery - Electrical equipment of machines - Part 1: General requirements IEC 60947-5-5:2005 Low-voltage switchgear and controlgear - Part 5-5: Control circuit devices and switching elements - Electrical emergency stop devices with mechanical latching function IEC 62061 Safety of machinery - Functional safety of safety- related electrical, electronic and programmable electronic control systems 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 15706-2012 and the following apply. 3.1 emergency stop(E-stop) emergency stop function function which is intended to ——avert arising or reduce existing hazards to persons, damage to machinery or to work in progress, and; ——be initiated by a single human action. [Source: GB/T 15706-2012, 3.40] 3.2 emergency stop equipment safety related parts of a control system which perform the emergency stop function Note: Typically emergency stop equipment is divided into input, processing and output elements. 3.3 emergency stop device manually actuated control device used to initiate an emergency stop function [Source: IEC 60947-5-5:2005, 3.2] 3.4 machine actuator power mechanism of the machine used to effect motion Note: Example of machine actuators are motor, solenoid, pneumatic or hydraulic cylinder. 3.5 safety function function of a machine whose failure can result in an immediate increase of risk(s) [Source: GB/T 15706-2012,3.30] 3.6 span of control of emergency stop device(s) predetermined section of the machinery under control of specific emergency stop device(s) 3.7 protective shroud mechanical measure provided to reduce the possibility of unintended actuation of an emergency stop device 3.8 emergency situation hazardous situation needing to be urgently ended or averted Note: An emergency situation can arise during normal operation of the machine (for example due to human interaction or as a result of external influences) or as a consequence of a malfunction or failure of any part of the machine. [Source: GB/T 15706-2012, 3.38, modified] 3.9 operator control station assembly of one or more control actuators fixed on the same panel or located in the same enclosure Note: Actuator is a part of a device to which an external manual action is to be applied (see IEC 60204-1:2005, 3.1). [Source: IEC 60204-1:2005, 3.13, modified] 4 Safety requirements 4.1 General 4.1.1 Emergency stop function 4.1.1.1 The purpose of the emergency stop function is to avert actual or impending emergency situations arising from the behaviour of persons or from an unexpected hazardous event. The emergency stop function is to be initiated by a single human action. 4.1.1.2 The emergency stop function shall be available and operational at all times. It shall override all other functions and operations in all operating modes of the machine without impairing other protective functions (e.g. release of trapped persons, fire suppression). When the emergency stop function is activated: ——it shall be maintained until it is manually reset; ——it shall not be possible for any start command to be effective on those operations stopped by the initiation of the emergency stop function. The emergency stop function shall be reset by intentional human action. Resetting of the emergency stop function shall be operated by disengagement of an emergency stop device (see 4.1.4). The reset shall not initiate machine start up. Note: The emergency stop function cannot be considered as measure of prevention of unexpected start up as described in GB/T 15706-2012. 4.1.1.3 The emergency stop function is a complementary protective measure and shall not be applied as a substitute for safeguarding measures and other functions or safety functions. 4.1.1.4 The emergency stop function shall not impair the effectiveness of other safety functions. Note: For this purpose, it can be necessary to ensure the continuing operation of auxiliary equipment such as magnetic chucks or braking devices. 4.1.1.5 The emergency stop function shall be so designed, that after actuation of the emergency stop device, hazardous movements and operations of the machine are stopped in an appropriate manner, without creating additional hazards and without any further intervention. Note: An "appropriate manner" can include: ——choice of an optimal deceleration rate taking into account the necessary design restraints of the machine; ——selection of the stop category (see 4.1.3); ——necessity for a predetermined shutdown sequence. Depending on the machine and the specific risks, the emergency stop function can initiate other functions other than stopping to minimize the risk of harm (e.g. reversal or limitation of motion, rate of braking) which can be part of the emergency stop function but not dealt with in this Standard. 4.1.1.6 The emergency stop function shall be so designed that a decision to activate the emergency stop device does not require the consideration of the resultant effects. 4.1.2 Span of control of emergency stop device(s) The span of control of each emergency stop device shall cover the whole machine. As an exception, a single span of control may not be appropriate when, for example, stopping all linked machinery could create additional hazards or unnecessarily affect production. Each span of control can cover section(s) of a machine, an entire machine or a group of machines (see Figure 1). Different spans of control may overlap. The assignment of spans of control shall be determined taking into account the following: a) the physical layout of the machine, based on the visible area of the machine; b) the possibility to recognize hazardous situations (e.g. visibility, noise, odour); c) any safety implications relating to the production process; d) the foreseeable exposure to hazards; e) the possible adjacent hazards. 4.1.2.1 More than one span of control can be applied, if the following requirements are met: ——the spans of control shall be clearly defined and identifiable; ——emergency stop devices shall be readily associated with the hazard requiring an emergency stop; ——the span of control of an emergency stop device shall be identifiable at the operating position of each emergency stop device (see also 4.1.1.6). Note: The clear identification could be realized by pictogram or by the location itself. Reading text or instructions associated to the emergency stop device or requiring prior knowledge should be avoided. Example: Such pictogram could be place next to an emergency stop device and would indicate the span of control of the device itself. ——actuation of an emergency stop device shall not create additional hazard(s) or increase the risk(s), in any span of control; ——actuation of an emergency stop device in one span of control shall not prevent the initiation of an emergency stop function in another span of control; ——information for use of the machine shall include information on the span of control of emergency stop device. So far as practicable, emergency stop devices with different spans of control shall not be located near each other. Key: 1——emergency stop device; 2——span of control; 3——section of machine or machine. Figure 1 Examples demonstrating the concept of span of control 4.1.3 Stop categories The emergency stop shall function in accordance with either of the following stop categories (see also IEC 60204-1). The relevant stop category shall be selected by the risk assessment. Stop category 0 Stopping by immediate removal of power to the machine actuators. Note 1: Additional braking can be necessary. Examples of stop category 0 are: ——switching off the electrical power to the electric motor(s) of the machine by electromechanical switching devices; ——mechanical disconnection (declutching) between the hazardous elements and their machine actuator(s); ——blocking the fluid power supply to the hydraulic/pneumatic machine actuators; ——removing the power needed to generate a torque or force in an electrical motor using the Safe torque off (STO) function of a power drive system in accordance with IEC 61800-5-2. Stop category 1 Stopping movements and operations with power available to the machine actuators to achieve the stop and then removal of power when the stop is achieved. Examples of stop category 1 are: ——deceleration of motion then removal of the electrical power to the motor(s) when motion has ceased by electromechanical switching devices; ——using the Safe stop 1 (SS1) function of a power drive system in accordance with IEC 61800-5-2. Note 2: For removal of power, it can be sufficient to remove the power needed to generate a torque or force. This can be achieved by declutching, disconnecting, switching off, or by electronic means (e.g. a Power Drive System (PDS) in accordance with IEC 61800-5-2), without necessarily performing isolation. 4.1.4 Disengagement (e.g. unlatching) of the emergency stop device The effect of an activated emergency stop device shall be sustained until the actuator of the emergency stop device has been disengaged. This disengagement shall only be possible by an intentional human action on the device where the command has been initiated. The disengagement of the device shall not restart the machinery but only permit restarting. The instructions for use of the machine shall state that, after actuation and before disengaging the device(s), the machinery shall be inspected in order to detect the reason for actuation.
Contents of GB/T 16754-2021
Foreword I Introduction III 1 Scope 2 Normative references 3 Terms and definitions 4 Safety requirements 4.1 General 4.2 Operating conditions, environmental influences 4.3 Emergency stop device 4.4 Use of wires or ropes as actuators 4.5 Prevention of unintended actuation of an emergency stop device 4.6 Portable operator control stations Bibliography
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Keywords:
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