This part of ISO13856 establishes general principles and specifies requirements for the design and testing of those pressure-sensitive protective devices, with or without an external reset facility, that are not specified in either ISO13856-1 or ISO13856-2, and the majority of which are produced for specific applications and are not available as “off-the-shelf” items. This part of ISO13856 also gives specific requirements for the following pressure-sensitive protective devices: pressure-sensitive bumpers; pressure-sensitive plates; pressure-sensitive wires (trip wires). It deals with the design of a pressure-sensitive device with regard to safety and reliability rather than its suitability for particular applications. NOTE1 For the relationship between safety and reliability, see ISO13849-1:2006, 4.2. NOTE2 The machinery manufacturer and/or user is responsible for installing appropriate types of protective device based on a risk assessment. It is not applicable to specifying the dimensions of pressure-sensitive protective devices in relation to any particular application, or stopping devices according to IEC60204-1 used for the normal operation, including emergency stopping of machinery. NOTE3 Specific requirements for particular applications are intended to be set forth in relevant type-C standards (see ISO12100 and Introduction). Additional requirements can be necessary where pressure-sensitive protective devices are used in locations accessible to elderly or disabled people or children. NOTE4 While requirements are given for the immunity of the device to electromagnetic disturbances, these are not intended to cover all aspects of electromagnetic compatibility (EMC).