Providing safety with optoelectronicprotective devices

IEC 62046/TS/Ed.1 contains essential information for selec-ting, using, connecting and inspecting no-contact safety equipment and circuit mats. It is intended for persons creating standards, machine manu- facturers, testing centres and anyone occupied with profes- sional installation of safety equipment. Regional requirements or machine-specific C standards must be observed with hig- her priority, however. Basic iterative process for selecting optoelectronic safety equipment1.Determine the protected area Perform an evaluation of risk as described in ISO 14121 (EN 1050) for each hazardous area. Determine the location and size of the protected area. The properties of the machine should be taken into consideration, as should the possibilities forbypassing the safety equipment and any possible consequences. 2.Define the protective function

Protective functionApplicationLeuze lumiflex products

Machine stop caused by detecting a hand or finger Machine stop caused by detecting a person entering the hazardous areaPreventing from restarting if the presence of a person is detectedCombination of access guarding and preventing restart When the operator is very close to thehazardous areaFor hazardous areas that are accessibleand when the hazardous area is somewhat further away 4.Calculate the safety distance The basic principle is that the appropriate regional and machinespecific form of calculation should always be used in determin-ing the minimum distance from the safety equipment to the hazardous area (for example IEC 62046/TS/Ed.1, ISO 13855(EN 999), ANSI B11.19-1990).The Leuze lumiflexOnline Safety Know-how Wizard at www
Detecting persons inside hazardous areas that are not completely visible and triggering a stop caused by another piece of safety equipment (for example a guard door switch) 3.Suitable safety category for control system andprotective equipment Optoelectronic safety equipment is available in different cate-gories of safety performance. When selecting safety equip-ment, fitters must make certain that the safety performanceprovides a suitable level of risk reduction. Standard ISO 13849 (EN 954) contains a method for selecting the safetycategory of the machine control system to meet the risk inquestion. In reference to the safety-related capability in de- tecting and responding to errors, the standardised sensor types of IEC 61496-1 roughly correspond to the control unitcategories of ISO 13849.
For hand and finger detection with access from behind, to secure hazar- dous areas or on mobile transport systems Safety light curtainsSingle-beam and multi-beam safetylight barriers, safety switchesSafety laser industrial scanner, horizontallypositioned safety light curtainsSafety light curtains with a host/guestdesign, safety laser scanners .safety-at- work.leuze.de cansupport you with in-teractive calculatingassistance in determi- ning safety distancesin accordance with ISO 13855.

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