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Operating Instructions
Chapter
2
CLV490 Bar Code Scanner
8009993/RA61/2007-07-20
©
SICK AG · Division Auto Ident · Germany · All rights reserved
2-3
Safety information
Note
A set of laser warnings in German/US English and French/US English is included in the
delivery scope. The GB English/US English warnings can be pasted over with these if
necessary.
If the CLV490 is installed in a machine/panel with the result that the laser warning la-
bels are no longer visible, additional warnings in the same language(not included in
the scope of delivery) must be provided on the machine beside the emergence aper-
ture of the laser beam.
Internal protective circuits
The CLV490 is equipped with monitoring circuits that deactivate the laser diode in the event
of a malfunction.
Activation and deactivation of the laser diode is controlled by the reading pulse (trigger
source).
A timer (laser timeout) automatically deactivates the laser diode in Reading mode ("Sensor
input" and "Serial interface" trigger mode) if the reading interval has not ended after
10 minutes (default setting). However, it does not end the reading interval. In this case, the
CLV490 outputs the message:
"Laser safety timeout"
on the auxiliary interface. The reading interval must be terminated by resetting the trigger
signal. The laser diode is activated again by the next reading trigger.
The laser timeout can be set in the range of 1 min to 25 h or deactivated
(see
In the "Percentage Evaluation" mode, "Adjusting" mode and "Show RA-limits" mode
as well as in the pulse mode "Free-running", in reading mode, the laser diode is con-
stantly activated. In the pulse mode "Object Polling" the laser diode is activated due
to the parameterized search/pause ratio. In the "Background Analysis" function the
laser didoe is constantly pulsed.
Note
In the Reading mode, the CLV490 carries out a measurement referencing at regular
intervals. During referencing, it turns the laser diode on for a maximum of 10 seconds.
Fig. 2-1:
Laser warning labels on the CLV490
black-yellow signed on device:
black-silver signed on
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