IDEC SG4 Type 4 Finger & Hand - Manual (Page 65)

Instruction Manual SG4-B Series
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OUTPUT SIGNAL SWITCHING DEVICE (OSSD): part of the ESPE
connected to machine control system. When the sensor is enabled
during standard operating conditions, it switches to disabled status.
PROTECTED AREA: area where a specified test object is detected by
the ESPE.
PROTECTIVE DEVICE: device having the function to protect the
operator against possible risks of injury due to the contact with
machine potentially-dangerous parts.
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.
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.
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).
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.
RISK: probability of occurrence of an injury and severity of the injury
itself.
SAFETY LIGHT CURTAIN: it is an active optoelectronic protective
device (AOPD) including an integrated system consisting of one or
several emitting elements and one or several receiving elements
forming a detection area with a detecting capacity specified by the
supplier.
START INTERLOCKING DEVICE (= START): device preventing
machine automatic start if the ESPE is live or the voltage is disabled
and enabled once again.
TEST PIECE: opaque object having a suitable size and used to test
safety light curtain correct operation.