INSTRUCTION MANUAL
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CHAPTER 1
GENERAL INFORMATION
GENERAL DESCRIPTION
The Laser Sentinel is an electro-sensitive protective equipment (ESPE). It employs active
opto-electronic protective devices responsive to the diffuse reflection of a radiation
(AOPDDRs), according to the definition and requirements of international safety stan
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dard IEC 61496-3. The optical radiation is a Class 1 infrared laser generated within the
device.
If the device is applied to a machine that presents a risk of personal injury, it provides
protection by making the machine revert into a safe condition before a person reaches
the hazardous points.
The working principle is: the invisible beam of the laser creates a two-dimensional
safety area that must be necessarily crossed in order to reach the dangerous point. In
this way, the dangerous movement of the machine can be stopped before anyone
reaches the hazard point.
The safety area can be horizontal and by using a Graphic User Interface, its shape can be
planned according to application needs.
The beam is emitted in short interval pulses and they are reflected by the objects in the
safety area. The device calculates the distance from the objects by measuring the time
interval between the transmission of the pulse and its reception after being reflected
(time-of-flight principle).
The safety area is scanned by a mirror that deflects the light pulses over 275 ° around
the device by rotating at a constant speed. In this way, all the opaque objects that have
a certain dimension can be detected in the safety area.
Within the sensing range of the device, two areas can be monitored simultaneously:
one is the Safety Zone, which is used to detect operators or objects entering a hazard
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ous area; the other is the Warning Zone, which can be defined with a longer distance
than a Safety Zone, allowing a configuration to detect objects that are closely approach
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ing the Safety Zone.
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