Before Using this Device
SF4C Safety light curtain
16
Do not arrange several receivers facing one emitter, or vice versa, as this could produce a
non-sensing area or cause mutual interference.
EXAMPLE
Correct installation
Sensing
area
Sensing area
Protective structure
Dangerous
part
Dangerous
part
Incorrect installation
Dangerous
part
Dangerous
part
Sensing area
Sensing area
2.4.2 Safety
Distance
!
DANGER!
Calculate the safety distance correctly and always maintain a
distance equal to or greater than the safety distance between the
sensing area of this device and the dangerous parts of the machine.
If the safety distance is miscalculated or not sufficient, the machine
will not stop quickly enough when a human body or an object
reaches the dangerous parts, which may result in serious injury or
death.
The safety distance is the minimum distance that must be maintained between the light curtain
and the dangerous parts of the machine so that the machine can be stopped before a human
body or an object can reach the dangerous parts.
The safety distance is calculated based on the equation described on the next page when a
person moves (normal intrusion) at a straight angle into the sensing area of the sensor.
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