GB/T 41351-2022 English PDF (GBT41351-2022)

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GB/T 41351-2022: Safety of machinery - Safety-related wireless control devices - General specification
GB/T 41351-2022
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 13.110
CCS J 09
Safety of machinery - Safety-related wireless control devices
- General specification
ISSUED ON: MARCH 09, 2022
IMPLEMENTED ON: OCTOBER 01, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3 
Introduction ... 5 
1 Scope ... 7 
2 Normative references ... 7 
3 Terms and definitions ... 9 
4 Technical requirements ... 10 
4.1 Safety functions and performance ... 10 
4.2 Requirements for main parts ... 12 
4.3 Ergonomics ... 13 
4.4 Climatic conditions ... 14 
4.5 Mechanical properties ... 14 
4.6 Electrical properties ... 15 
4.7 Electromagnetic compatibility ... 16 
5 Validations and tests ... 16 
5.1 Validation of safety functions and performance ... 16 
5.2 Main parts ... 17 
5.3 Ergonomics ... 18 
5.4 Climatic conditions ... 18 
5.5 Mechanical properties ... 18 
5.6 Electrical properties ... 19 
5.7 Electromagnetic compatibility ... 20 
6 Information for use ... 20 
6.1 General requirements ... 20 
6.2 Enclosure identification ... 20 
6.3 Operating instructions ... 21 
Bibliography ... 22 
Safety of machinery - Safety-related wireless control devices
- General specification
1 Scope
This document specifies the technical requirements for safety-related wireless control
devices and their validation and test methods, as well as the requirements for
information for use of safety-related wireless control devices.
This document applies to safety-related wireless control devices that transmit and
receive safety-related signals.
This document does not apply to safety-related wireless control devices used in
explosive atmospheres.
2 Normative references
The contents of the following documents, through normative references in this text,
constitute indispensable provisions of this document. Among them, for dated references,
only the edition corresponding to that date applies to this document. For undated
references, the latest edition (including all amendments) applies to this document.
GB/T 2423.5-2019 Environmental testing - Part 2: Test methods - Test Ea and
guidance: Shock
GB/T 2423.7-2018 Environmental testing - Part 2: Test methods - Test Ec: Rough
handling shocks, primarily for equipment-type specimens
GB/T 2423.10-2019 Environmental testing - Part 2: Test methods - Test Fc:
Vibration (sinusoidal)
GB/T 2423.22-2012 Environmental testing - Part 2: Test methods - Test N: Change
of temperature
GB/T 4208-2017 Degrees of protection provided by enclosure (IP code)
GB 4793.1-2007 Safety requirements for electrical equipment for measurement,
control, and laboratory use - Part 1: General requirements
GB/T 5169.11-2017 Fire hazard testing for electric and electronic products - Part 11:
Glowing/hot-wire based test methods - Glow-wire flammability test method for end-
products (GWEPT)
The safety functions, which can be achieved by the safety-related wireless control
device, shall be described in the operating instructions.
The stop/emergency stop function shall take precedence over the machine start function.
Resetting after an emergency stop shall not be dangerous.
4.1.2 Performance level (PL) or safety integrity level (SIL)
The manufacturer shall provide at least the following main safety-related parameters:
- Performance level (PL) or safety integrity level (SIL);
- Category (Cat.);
- Mean hourly probability of dangerous failure (PFHD).
When necessary, the manufacturer shall also provide the following compliance
verification information:
- Mean time to dangerous failure per channel (MTTFD);
- Diagnostic coverage (DC);
- Mean cycles to dangerous failure (B10D);
- Common cause failure (CCF).
Note: See GB/T 30175-2013 for the relationship between PL and SIL.
4.1.3 Response time
Under normal and/or fault conditions (for example, component failure or transmission
signal interference), the time between the command issued by the control unit and the
control signal output by the receiver shall not exceed the range given by the
manufacturer.
During the working period, it shall repeatedly send the data frame. The interval between
two data frames shall be within the range given by the manufacturer. If out of range,
the receiver shall bring the equipment into a safe state.
4.1.4 Prevent misuse
It shall take measures (e.g., passwords or special keys) to prevent unauthorized
personnel from operating the safety-related wireless control device.
Each control unit shall be able to identify its corresponding machine.
When the machine is controlled by a local control device (control device other than the
control unit), measures shall be taken to prevent the machine from being out of control
due to the misuse of the control unit.
Parameters, such as transmission frequency and address assignment of wireless security
control devices, shall only be set and managed by authorized professionals.
4.1.5 Power supply safety
Changes in the supply voltage shall not be dangerous. When performing one or more
potentially dangerous movements, if the supply voltage exceeds the allowable range,
the control unit shall generate an audio-visual alarm signal. If the cell voltage of the
control unit drops to a level where reliable signal transmission cannot be guaranteed,
the control unit shall issue a stop command; then issue a command to no longer send
data, until the control unit is turned on again.
4.1.6 Multiple control units and multiple machines
When multiple control units correspond to the same receiver, measures shall be taken
to ensure that only one control unit works at the same time. If it is necessary to transfer
control from one control unit to another control unit, it can only be activated after the
receiver has completed the current command and received the command to transfer
control. However, in any case, the receiver shall respond to the shutdown command
issued by each control unit.
When multiple control units correspond to multiple receivers, within the coverage range
of the control unit's transmission signal, measures shall be taken to prevent mutual
effects, so as to prevent the machine from producing unexpected actions.
4.2 Requirements for main parts
4.2.1 Transmitter
The effective distance of the transmitter shall not be less than 30 m.
The frame information sent by the transmitter shall be sent continuously in a periodic
cycle. The transmission period of a single frame of information shall not be greater than
0.15 s. The frame information shall contain the check code. The status of whether the
transmitter is activated shall be displayed on the control unit. Activation shall not cause
the action of the machine.
4.2.2 Receiver
The receiver shall confirm the address code for each frame of information, and then
confirm the command function code. The loss of the address code shall not cause an
emergency stop of the machine. Each receiver shall only accept command signals from
the paired address control unit. If the control unit fails, permanently changing the
a height of 1000 mm. During the test, the device shall be active. During and/or after the
test, the control unit shall at least enter and maintain a safe state.
4.5.4 Degree of protection provided by enclosure
The degree of protection provided by enclosure of the control unit and receiver of the
safet...