New! - Norman Equipment Co.

Modes of operation and functionsMaster/Slave cascadingFor the SLC/SLG…M/Sproduct series, the masterlight curtain can be extendedwith another (slave) lightcurtain (cascading). In thisway, multiple protection fieldscan be generated. Aprotection field is createdbetween the emitter andreceiver of the master as wellas other protection fieldsbetween the slavecomponents.This device cascadingprovides for a comfortableand efficient protection ofcontiguous protection fieldsagainst reaching over orthrough the protection field.The slave light curtains areconnected to the master bymeans of an M12 connector.The master and slave lightcurtains are available indifferent sizes and resolutionsand allow for almost anycombination.MutingIf goods or objects must betransported in or out of thehazardous area withoutstopping the machine, thesafety light curtain must beautomatically and temporarilysuspended by the safetyrelatedparts of the controlsystem.To this end, two or four mutingsensors are used to detectwhether a person isapproaching the hazardousarea or a transport systementers or leaves the hazardousarea. Suitable muting sensorsare light barriers, proximityswitches or position switches.The integrated safety-mutingcontroller of the safety lightcurtain or light grid monitorsand controls the mutingprocess.The safety outputs are notdisabled.When the mutingfunction is used, an externalmuting lamp must beconnected as well in order toenable the system beingactivated. Any malfunction ofthe monitored signal sourcewill cause the OSSD’s to beswitched off.Depending on the application,different light curtains withintegrated muting function aswell as external or internalmuting sensors are available.Detailed product informationcan be found in this brochurefrom page 33.Blanking /Floating BlankingIf continuity of the productionprocess is required, a part ofthe protection field can beblanked without triggering astop signalIn this way, objects such aswork pieces can be fed or aconveyor belt can bepositioned at a fixed positionin the protection field.The integrated floatingblanking function of theSLC…B light curtains enablesa flexible blanking of up tothree adjacent light beams inthe protection field of the lightcurtain. This function isrequired to ensure that one,two or three adjacent lightbeams can be interrupted atan undefined position in theprotection field.In this way, objects such asfixtures or materials withslightly varying heights can befed through the light curtainwithout triggering a stopsignal. Five different floatingblanking functions areavailable. The distinguishingfeature of the different modesis the number of light beamsthat can be interrupted by anobject. In addition to that, itcan be defined whether theobject may interrupt theprotection field permanently oronly temporarily. Theinterrupted light beams can beat any position in theprotection field.Aport from the first infraredlight beam (the beam closestto the connector), any lightbeam can be used for floatingblanking.A complex programmingthrough software andcomputer or complicatedteach-in procedures is notrequired, as the floatingblanking functions areconfigured in the connector ofthe AOPD’s receiver unit.When floating blanking isapplied, the resolution of thelight curtain changes. Thetechnical documentation of thedifferent light curtains includesthe tables with the effectiveresolutions D to calculate theminimum safety distance to EN999.Further technical productinformation can be found inthis brochure.MasterSlave2721 21 Floating-Blanking-Area2 movable object