New! - Norman Equipment Co.

Design and operating principleOptoelectronicSafety light barriersThe safety light barriersystems of the SLB range areactive optoelectronicprotective devices (AOPD)fulfilling the Control Category2 or 4 in accordance with EN954-1 or EN 61496. Thesesystems are used as entryguards on hazardous zones,danger points and entrances.They protect human lifewithout restricting theproduction flow.Typical applications for safetylight barriers are on robots,automatic-processing plants,transfer lines, rack storagesand pallet loaders.The entire safety light barriersystem includes a lightemitter, a light receiver and asafety monitoring module.The safety monitoring moduleevaluates the signals of theemitter.If the light beam is interrupted,a signal is emitted to bring thedangerous movement of themachine to standstill.The safety monitoring moduleintegrates functions such asstart and restart interlock aswell as a contactormonitoring.The maintenance-free safetysensors of the system withprotection class IP 67 have anintegrated soiling check.Because of their small size,safety light barriers can befitted almost everywhere.Safety light grids /light curtainsThe safety light curtains andsafety light grids of the SLCand SLG meet therequirements of ControlCategory 2 or 4 to EN 954-1and Type 2 or Type 4 to EN61496.They safeguard danger pointsand hazardous areas ondifferent applications, e.g.presses, robot stations,injection moulding machines,pallet machines, etc.In these active optoelectronicprotective devices (AOPD), theemitter and receiver are fittedin two separate enclosures.An invisible infrared signal issent from the emitter andevaluated by the receiver. Ifthe light beam is interruptedby an object or a person, astop signal is emitted to bringthe machine to standstill.The protection field is definedby the height and width of theprotection field. Theprotected height is the rangebetween the first and lastinfrared light beam of a lightcurtain. The protected heightdefines the physical size ofthe system to be used.The protected width oroperating range is thedistance between thetransmitter and receiver unit.For an accurate detection ofobjects with different sizes inthe hazardous area,the user can choose betweenlight grids and light curtainswith different resolutions.Here, the following ruleapplies: the smaller thedistance between twoadjacent light beams, themore accurate the detectionsensitivity of the AOPD.For the detection of bodyparts, a distinction is madebetween finger, hand andbody protection.EN 999 or EN 294 sets thebiometric data for fingerprotection to 14 mm, for handdetection to 40 mm, for legdetection up to 70 mm and forbody detection to over 70mm.Safety light grids with 2, 3 or 4individual beams are generallyused to detect the penetrationof the entire human body.Safety light curtains aremultiple beam systems (> 5individual beams) and canalso detect smaller objects incase of intrusion into theprotected field. Themaintenance- free safety lightcurtains and light grids can besmoothly fitted using an M12connector and have adiagnostic LED indication forstatus messages.Depending on the type ofsafety light curtain or light gridused, the components havean integrated evaluation withProtected width (operating range)start/restart interlock andcontactor monitoring.Additional functions such asblanking, muting andcascading of the light curtainsare available as well.These functions are simplyconfigured in the AOPDthrough the contactconfiguration (no configurationsoftware required).The SLC and SLG productseries therefore offer amaximum of flexibility forsafeguarding different dangerpoints.Protectied height268Light beam