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EMITTER:
unit emitting infrared beams, consisting of a set of optically-synchronised LEDs.
The emitting unit, combined with the receiving unit (installed in the opposite position),
generates an optical “curtain”, i.e. the detecting area.
START INTERLOCKING DEVICE (= START):
device preventing machine automatic start if
the ESPE is live or the voltage is disabled and enabled once again.
RESTART INTERLOCKING DEVICE (= RESTART):
device preventing machine automatic
restart after sensor activation during a dangerous phase of machine operating cycle, after a
change of machine operating mode, and after a variation in machine start control devices.
CONTROLLED MACHINE:
machine having the potentially-dangerous points protected by
the light curtain or by another safety system.
MACHINE OPERATOR:
qualified person allowed to use the machine.
QUALIFIED OPERATOR:
a person who holds a professional training certificate or having a
wide knowledge and experience and who is acknowledged as qualified to install and/or use
the product and to carry out periodical test procedures.
WORKING POINT:
machine position where the material or semifinished product is worked.
RECEIVER:
unit receiving infrared beams, consisting of a set of optically-synchronised
phototransistors. The receiving unit, combined with the emitting unit (installed in the opposite
position), generates an optical “curtain”, i.e. the detecting area.
RISK:
probability of occurrence of an injury and severity of the injury itself.
CROSSING HAZARD:
situation under which an operator crossing the area controlled by the
safety device and this latter stops and keeps the machine stopped until the hazard is
eliminated, and then enters the dangerous area. Now the safety device could not be able to
prevent or avoid an unexpected restart of the machine with the operator still present inside
the dangerous area.
OFF STATUS:
status when the output circuit is interrupted and does not allow current
stream.
ON STATUS:
status when the output circuit is operational and allows current stream.
RESPONSE TIME:
max. time elapsing between the occurrence of the event leading to
sensor activation and the reaching of the inactive state by the output signal switching device
(OSSD).
TEST PIECE:
opaque object having a suitable size and used to test safety light curtain
correct operation.
TYPE (OF ESPE):
the Electrosensitive Protective Equipment (ESPE) have different
reactions in case of faults or under different environmental conditions. The classification and
definition of the "type" (ex. type 2, type 4, according to IEC 61496-1) defines the minimum
requirements needed for ESPE design, manufacturing and testing.
DANGEROUS AREA:
area representing an immediate or imminent physical hazard for the
operator working inside it or who could get in contact with it.
Содержание SG4-14-030-OO-P
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