8
Operation
8.1
Safety
Important information
DANGER
Hazard due to lack of effectiveness of the protective device
Persons and parts of the body to be protected may not be recognized in case of non-
observance.
b
Maintenance work, alignment work, fault diagnoses, and any changes to the inte‐
gration of the protective device in the machine must only be carried out by quali‐
fied personnel.
b
The effectiveness of the protective device must be checked following such work.
DANGER
Hazard due to lack of effectiveness of the protective device
Persons and parts of the body to be protected may not be recognized in case of non-
observance.
b
Make sure that the optical properties of the front screens of the sender and
receiver are not changed, e.g., by:
°
Beading water, mist, frost, or ice formation. If applicable, remove films or
other types of contamination, disconnect the voltage supply of the receiver
and then switch it back on.
°
Scratches or damage. Replace the device whose front screen is scratched or
damaged.
b
Make sure that all reflective surfaces and objects maintain a minimum distance
from the light beams.
b
Make sure that no dispersive media (e.g., dust, fog, or smoke) are within the calcu‐
lated minimum distance from the light beams.
NOTE
This document does not provide instructions for operating the machine in which the
multiple light beam safety device is integrated.
Further topics
•
"Minimum distance from reflective surfaces", page 17
8.2
Regular thorough check
The test is intended to ensure that the hazardous area is monitored by the protective
device and that unprotected access to the hazardous area is prevented.
b
Carry out the checks according to the instructions from the manufacturer of the
machine and from the operating entity.
8
OPERATION
46
O P E R A T I N G I N S T R U C T I O N S | deTem4 Core
8020453/14Q7/2020-04-27 | SICK
Subject to change without notice
