Operating Instructions
Chapter
2
CLV 490 Bar Code Scanner
8 009 993/O824/20-12-2004
©
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 CLV is installed in a machine/panel with the result that the laser warning labels
are no longer visible, additional warnings (not included in the scope of delivery) must
be provided on the machine beside the emergence aperture of the laser beam.
Internal protective circuits
The CLV is equipped with monitoring circuits that deactivate the laser diode in the event of
a malfunction. No maintenance required to keep this product in compliance with laser
class II.
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
CLV outputs the message:
"Laser safety timeout"
on the terminal 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 CP-limits" mode as
well as in the pulse mode "Free-running", in reading mode, the laser diode is constantly
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 di-
doe is constantly pulsed.
Note
In the Reading mode, the CLV carries out a distance 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 CLV
black-yellow signed on
black-silver signed on device: