Operating Instructions
Chapter
2
CLV 42x bar code scanner
Safety information
8 009 981/O078/16-08-2004
©
SICK AG · Division Auto Ident · Germany · All rights reserved
2-3
Note
The device is supplied with an additional set of laser warning labels in German/US English
and in French/US English. If necessary, these can be used to cover the GB English/
US English warning.
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
Explanation
The CLV is equipped with monitoring circuit-breakers that switch off the laser diode if
problems arise with the laser beam. No maintenance required to keep this product in
compliance with laser class II.
Activation and deactivation of the laser diode when reading is controlled by the reading
pulse (trigger source).
A timer (laser timeout) automatically deactivates the laser diode 10 minutes (default setting)
after a continuous reading pulse is initiated in reading mode with switching input pulse
modes "Sensor Input" and "Serial Interface". In this case, the CLV outputs the message:
"Laser safety timeout"
via the terminal interface.
The reading pulse interval is to be terminated by resetting the pulse signal. The laser diode
is activated again by the next reading pulse.
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, "Show CP-limits" and
"AutoSetup" mode as well as in the pulse modes "Free Running" and “Continuous
Read“, in reading mode, the laser diode is constantly activated. In the "reflector
polling" trigger mode the laser diode is switched on for each 20th scan.
Fig. 2-1:
Laser warning labels found on the CLV
CLV 420/422
CLV 421
black-yellow signed on device:
black-silver signed on device: