IDEC SE1L, Manual

Page: 8 / 20

8
SE1L
Safety Laser Scanner
SE1L origin point
Unprotected
area
Protection
zone
180° 0°
90°
Warning
zone1
Warning zone 2
Similarly, when an object is detected in a warning zone,
the WARNING signal will turn OFF. The distance is
measured by the Time of Flight (TOF) principle. When
the motor rotates, the pulse laser beam is emitted within
the scanning range of 190º and is reflected back from an
object within the range. The distance can be calculated as
follows:
L =
1
−
2
× C × T
L = Distance to the object
C = Speed of light
T = Time difference
Operating Principle
Scanning Range
The figure below shows the scanning range of the SE1L.
Protection zone and warning zones 1 and 2 are configured
using the SLS Configurator. When an object enters the
protection zone, the OSSD signal will turn from ON to OFF.
TOF Operating Principle
Object
Distance to object (L)
Photodiode
Laser
Time difference
Emitted pulse laser
Received pulse laser
Scanning Area
The scanning area of the SE1L consists of a protection
zone and two warning zones. A protection zone is an
area that is directly connected to an OSSD signal. When
an object is detected in the protection zone, the SE1L
switches the OSSD signal to OFF (triggers the switch that
stops the machine or the AGV). For moving applications,
the OSSD signal is used as an emergency stop signal.
Protection Zone
Below are examples of protection zones configured by
manual mode and auto mode with the SLS Configurator.
The operator must configure the software so that the
hazardous areas are fully protected.
Manual configuration of protection zone
Configurable
Points
Auto configuration of protection zone
Background
Distance
between
protection
zone and
background
x
The operator must test to make sure that the
protection zone is properly configured before
operation.
x
The configured protection zone must have a
minimum safety distance.
x
The minimum sensing width varies with distance.
x
When setting the protection zone, take into
consideration additional safety distances.
Note:
x
Before operation, evaluate detection capability by using the actual object.
x
For details on SLS Configurator, see user’s manual.
TOF Operating Principle
(14/04/28)