This document specifies the safety requirements of a two-hand control device (THCD) and the
dependency of the output signal from the actuation by hand of the control actuating devices.
This document describes the main characteristics of THCDs for the achievement of safety and sets out
combinations of functional characteristics for three types. It does not apply to devices intended to be
used as enabling devices, as hold-to-run devices or as special control devices.
This document does not specify with which machines THCDs shall be used. It also does not specify which
types of two-hand-control device shall be used for a specific application. Moreover, while guidance is
given, it does not specify the required distance between the THCD and the danger zone (see 8.8).
This document provides requirements for design and guidance on the selection (based on a risk
assessment) of THCDs including the prevention of defeat, the avoidance of faults and verification of
compliance.
NOTE 1 A THCD only offers protection for the person using it.
NOTE 2 For specific machines, the suitability of a two-hand control as a suitable protective device can be
defined in a type-C standard. If such a standard does not exist or is not appropriate, the risk assessment and
determination of suitable protective measures is the responsibility of the manufacturer of the machine.
This document applies to all THCDs, independent of the energy used, including:
— THCDs which are fully assembled for installation;
— THCDs which are assembled by the machine manufacturer or integrator.
This document is not applicable to THCDs manufactured before the date of its publication.
Required fields are indicated with *
