6 Maintenance
DANGER
Risk of ignition or explosion
b
Disconnect the power supply before carrying out any maintenance work to avoid
igniting hazardous atmospheres.
b
Do not reconnect the power supply until you have completed the maintenance
work.
DANGER
Risk of ignition
Failure to observe this information could result in a risk of ignition.
b
If the safety light curtain is used in an environment classified as tb IIIC, tc IIIB or
tc IIIC the cover must not be removed, not even temporarily (e.g. for maintenance
purposes).
DANGER
Risk 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
Risk 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.
The safety light curtain is maintenance-free. Depending on the ambient conditions, reg‐
ular cleaning is required.
6.1 Regular cleaning
DANGER
Risk of ignition or explosion
Static discharge could cause explosions in hazardous atmospheres.
b
Always use anti-static cleaning agents to prevent static charge.
b
Do not clean the device using a dry cloth.
NOTICE
b
Do not use aggressive cleaning agents.
b
Do not use abrasive cleaning agents.
b
Do not use any oil-based cleaning agents.
b
We recommend anti-static cleaning agents.
Clean the front screen.
1. Use a clean, soft brush to remove dust from the front screen.
2. Then wipe the front screen with a clean, damp cloth.
6 MAINTENANCE
24
O P E R A T I N G I N S T R U C T I O N S | C4000 Select Ex 8017025/YIZ2/2015-02-25 | SICK
Subject to change without notice
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