10 Maintenance
The safety light curtain is maintenance-free. Depending on the ambient conditions, reg‐
ular c
leaning is required.
10.1 safety
DANGER
H
azard 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
Do not do repair work on device components.
b
Do not make changes to or manipulate device components.
b
Apart from the procedures described in this document, the device components
must not be opened.
DANGER
Ris
k of ignition or explosion
b
Disconnect the voltage supply before any maintenance work is carried out to avoid
igniting hazardous atmospheres.
b
Only reconnect the voltage supply once you have completed the maintenance
work.
DANGER
Ris
k of ignition or explosion
b
If you have to remove the cover when working on the safety light curtain, make
sure that the joints and o-ring are clean and undamaged before refitting the cover.
DANGER
Ris
k of ignition or explosion
b
Use fixing screws with a yield point of at least 640 MPa to attach the cover to the
explosion-proof enclosure.
10.2 Regular cleaning
Overview
D
epending on the ambient conditions of the safety light curtain, the front screens must
be cleaned regularly and in the event of contamination. Static charges can cause dust
particles to be attracted to the front screen.
The weld spark guard and deflector mirrors must be cleaned regularly and in the event
of contamination.
If contamination increases, the two lit diagnostics LEDs 1 and 2 show that the receiver
is getting a weak signal from the sender. If the device is not cleaned and contamination
increases, the safety light curtain switches to the OFF state when contamination is high.
10 M
AINTENANCE
76
O P E R A T I N G I N S T R U C T I O N S | deTec4 Ex 8022883/2019-03-07 | SICK
Subject to change without notice
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