Complementary information
T
he safety laser scanner can be mounted and operated in any orientation.
Position and direction information in this document:
•
The top is the side of the safety laser scanner on which the optics cover is located.
•
The bottom is the side of the safety laser scanner opposite the optics cover.
•
The front is the side of the safety laser scanner on which the display is located.
The 90° angle of the sector of a circle scanned by the safety laser scanner points
in this direction.
•
The back is the side of the safety laser scanner opposite the display. The sector of
a circle not scanned by the safety laser scanner lies in this direction.
Further topics
•
"C
onnections", page 16
•
"Status indicators", page 135
3.3 Setup and function
The safety laser scanner is an electro-sensitive protective device (ESPE) which scans its
sur
roundings two-dimensionally using infrared laser beams.
The safety laser scanner forms a protective field using the invisible laser beams. This
protective field protects the hazardous area and enables hazardous point protection,
access protection or hazardous area protection. As soon as an object is situated in the
protective field, the safety laser scanner signals the detection by means of a signal
change at the safety output (OSSD for example). The machine or its control must safely
analyze the signals (for example using a safe control or safety relays) and stop the
dangerous state.
The safety laser scanner operates on the principle of optical time-of-flight measure‐
ment. It emits light pulses in regular, very short intervals. If the light strikes an object,
it is reflected. The safety laser scanner receives the reflected light. The safety laser
scanner calculates the distance to the object based on the time interval between the
moment of transmission and moment of receipt (∆t).
Figure 4: Principle of time-of-flight measurement
1
Transmitted light pulse
2
Reflected light pulse
3 PRODUCT DESCRIPTION
14
O P E R A T I N G I N S T R U C T I O N S | microScan3 – EtherCAT® 8025220/1L9Q/2023-08-14 | SICK
Subject to change without notice
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