GB/T 19671-2022Safety of machinery - Two-hand control devices - Principles for design and selection (English PDF)

1 Scope

This document specifies the safety requirements for a two-hand control device (THCD) and the dependence between the output signal and the manually operated actuating device.

relationship.

This document presents the main characteristics of THCD used to achieve a safe state, and also presents the functional characteristics of the three types of THCD combination. This document does not apply to devices intended to be used as enabling devices, keep-run devices or special control devices.

This document does not specify which machines require the use of THCD, nor does it specify what type of THCD is used in a specific application. In addition, as much as possible

Although guidelines are given, this document does not specify the distance between THCD and the danger zone (see 8.8).

This document presents THCD design requirements and selection guidelines based on risk assessment, including prevention of deprecation, failure avoidance, and compliance verify.

Note 1.THCD only provides protection to its operator.

Note 2.For a specific machine, it may be specified in the Class C standard whether it is appropriate to use a two-handed control device as a protective device. If there is no standard or inappropriate,

The machine manufacturer is then responsible for carrying out a risk assessment and determining the applicable protective measures.

This document applies to all THCDs using various energy sources, including.

--- THCD is fully assembled and ready to install;

--- THCD assembled by machine builder or integrator is required.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references

For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 15706-2012 Risk Assessment and Risk Reduction of Machinery Safety Design General Principles (ISO 12100.2010, IDT)

GB/T 16855.1-2018 Safety-related components of machinery safety control systems Part 1.General principles for design (ISO 13849-1.

2015, IDT)

GB/T 16855.2-2015 Safety-related components of machinery safety control systems Part 2.Confirmation (ISO 13849-2.2012,

IDT)

GB/T 19876-2012 The safety of machinery and the positioning of safety guards related to the approach speed of human body parts (ISO 13855.

2010, IDT)

IEC 62061 Functional safety of electrical, electronic and programmable electronic control systems related to the safety of machinery and electrical safety (Safetyof trolsystems)1)

1) IEC 62061.2005 AMD1.2012 AMD2.2015 has been replaced by IEC 62061-2021.

Note. GB 28526-2012 Functional safety of electrical, electronic and programmable electronic control systems related to electrical safety of machinery (IEC 62061.2005,

IDT)

GB/T 19670 | GB/T 18717.1 | GB/T 18717.2 | GB/T 17889.7 | […]