Datalogic SG2 Instruction Manual

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Datalogic SG2 Instruction Manual Manual pdf 60 page image

SG2 EXTENDED Instruction Manual5615. GLOSSARYACTIVE OPTOELECTRONIC PROTECTIVE DEVICE (AOPD): its detection function is achieved thanksto the use of optoelectronic receivers and emitters detecting the optical beams interruptions inside thedevice caused by an opaque object present inside the specified detecting area.An active optoelectronic protective device (AOPD) can operate both in emitter-receiver mode and inretro-reflective light curtains.BLOCK CONDITION (=BREAK): status of the light curtain taking place when a suitably-sized opaqueobject (see DETECTING CAPACITY) interrupts one or several light curtain beams.Under these conditions, OSSD1 and OSS2 light curtain outputs are simultaneously switched OFF withinthe device response time.CONTROLLED MACHINE: machine having the potentially-dangerous points protected by the lightcurtain or by another safety system.CROSSING HAZARD: situation under which an operator crossing the area controlled by the safetydevice and this latter stops and keeps the machine stopped until the hazard is eliminated, and thenenters the dangerous area. Now the safety device could not be able to prevent or avoid an unexpectedrestart of the machine with the operator still present inside the dangerous area.EMITTER: unit emitting infrared beams, consisting of a set of optically-synchronised LEDs. The emittingunit, combined with the receiving unit (installed in the opposite position), generates an optical “curtain”,i.e. the detecting area.DANGEROUS AREA: area representing an immediate or imminent physical hazard for the operatorworking inside it or who could get in contact with it.DETECTING CAPACITY (= RESOLUTION): limit of the parameter of the sensor function specified bythe supplier, that will enable the electrosensitive protective equipment (ESPE). In case of an activeoptoelectronic protective device (AOPD), with resolution we mean the minimum dimension, which anopaque object must have in order to interrupt at least one of the beams that constitute the sensitivearea.ELECTROSENSITIVE PROTECTIVE EQUIPMENT (ESPE): assembly of devices and/or componentsworking together to activate the protective disabling function or to detect the presence of something andincluding at least: a sensor, command/control devices and output signal switching devices.FINAL SWITCHING DEVICE (FSD): part of the control system connected to machine safety andbreaking the circuit towards machine primary command element (MPCE) when the output signalswitching device (OSSD) reaches the inactive condition.OUTPUT SIGNAL SWITCHING DEVICE (OSSD): part of the electrosensitive protective equipment(ESPE) connected to machine control system that, when the sensor is triggered during standardoperating mode, is switched to the inactive status.MACHINE OPERATOR: qualified person authorised for machine use.MACHINE PRIMARY COMMAND ELEMENT (MPCE): electrically-powered element having the directcontrol of machine regular operation so as to be the last element, in order of time, to operate when themachine has to be enabled or blocked.MIN. INSTALLATION DISTANCE: min. distance necessary to allow machine dangerous moving partsto completely stop before the operator can reach the nearest dangerous point. This distance shall bemeasured from the middle point of the detecting area to the nearest dangerous point. The factorsaffecting min. installation distance value are: machine stop time, safety system overall response time,barrier resolution.N.O.: normally openedN.C.: normally closedOFF STATUS: status when the output circuit is interrupted and does not allow current stream.

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