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• In the case of S1 =
edge + t.
A pulse during the time t triggers the timer again.
Switch 3 = b:
The signal "object present" is
transferred to the switching
output after a delay.
• In the case of S1 =
output switches ON after the
rising edge + t.
• In the case of S1 =
output switches OFF after the
rising edge + t.
A pulse during the time t triggers
the timer again.
Operation
Check the safe functioning of the through-beam sensor.
Display by LEDs and function check output.
• Green LEDs are lit = supply voltage o.k.
• Red LEDs are lit (receiver) = light reception (no object between
transmitter and receiver).
• Red LEDs flashing = reception deteriorating (e.g. by soiling of the
lenses or maladjustment).
• Yellow LED is lit = output switched.
The function check output indi-
cates a wrong object detection
(soiling of the lenses, maladjust-
ment) by means of a 5 Hz
signal.
When the object is again clearly
detected, the output provides
again a continuous signal.
Maintenance: Keep the lens of the sensor free from soiling.
the output switches ON after the falling
Objekt
1
0
the
S1 =
1
0
the
S1 =
1
0
1
fc-out
0
1
U
B
0
-t-
-t-
-t-
-t-
100ms
fault
t'
-t-
t' -t-
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