ISO 13856-3-2013 pdf free.Safety of machinery一Pressure- sensitive protective devices – Part 3: General principles for design and testing of pressure-sensitive bumpers, plates, wires and similar devices.
This part of Iso 13856 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 ISO 13856-1 or ISO 13856-2, and the majority of which are produced for specific applications and are not available as “off-the-shelf’ items.
This part of ISO 13856 also gives specific requirements for the following pressure-sensitive
protective devices:
a) pressure-sensitive bumpers;
b) pressure-sensitive plates;
c) 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.
NOTE 1 For the relationship between safety and reliability, see ISO 13849-1:2006.4.2.
NOTE 2 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 IEC 60204-1 used for the normal operation, including emergency stopping of machinery.
NOTE 3 SpecifIc requirements for particular applications are intended to be Set forth In relevant type-C standards (see ISO 12100 and Introduction).
Additional requirements can be necessary where pressure-sensitive protective devices are used in locations accessible to elderly or disabled people or children.
NOTE 4 While requirements are given for the immunity of the device to electromagnetic disturbances, these are not Intended to coverall aspects of electromagnetic compatibility (EMC).
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
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12100 and the fllowing apply.
4.1 General
The majority of pressure-sensitive protective devices covered by this part of Iso 13856 are made for specific applications. Where appropriate, the device manufacturer and the machine builder shall agree on the application specific requirements in accordance with a risk assessment and specify the essential force-travel data for the application.
The pressure-sensitive protective device shall have dimensions and be positioned such that the sensor will detect by touch the approach of a person or part of a person to a hazardous situation or a hazard zone.
In general, there are two types of application, as follows.
a) The device is used to stop the hazardous parts of machinery that are remote from the sensor. In this application, the distance between the sensor and the moving parts of the machine shall be such that the machine stops before any part of the body can reach the hazardous zone. The distance shall be calculated on the basis of the principles presented in ISO 13855. See the example given in C.4.2.
b) The sensor is mounted on the hazardous part of the machine or adjacent to it, so that the machine will stop or reverse to a safe position after the sensor is actuated and before injury can occur. See the example given in C.3.1O.
The following basic requirements apply to all the pressure-sensitive protective devices covered by this part of ISO 13856. Additional specific requirements are given for pressure-sensitive bumpers, pressure- sensitive plates and pressure-sensitive wires. These specific requirements according to 4,3. to 4,.5 take precedence over the basic requirements given in 42.
4.2 Basic requirements
4.2.1 Actuating Force
For the test method, see Z.U and 215.
The lowest actuating force(s) necessary to cause the output signal switching device to go to an OFF state shall not exceed those specified in Table 2. when applied
— in the reference direction(s),
— over the effective sensing surface,
— at the relevant approach speed(s),
— with the sensor in the mounting orientations,
— with the relevant test piece, and
— over the temperature range,
which the manufacturer of the pressure-sensitive protective device has specified or which have been agreed by the manufacturer of the pressure-sensitive protective device and the machine builder(s).ISO 13856-3 pdf free download.