Project Engineering
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5.2.5.2.1 Conditions of Use
• If a non-hidden beam is covered, this is classed as a penetration and the OSSDs are switched.
• Hidden areas are monitored. Beams must not be detected in this area (“monitored blanking”). I.e. they
must always be covered by the blanking object. If a hidden beam is uncovered, the receiver enters error
state.
• At least 1 synchronization beam and the neighboring beam must not be hidden.
• There must be a distance of at least 1 beam between two hidden areas.
• There is no limit on the number of hidden areas.
• The hidden areas can be taught-in on the receiver of the ESPE or parametrized via IO-Link.
DANGER!
• Hidden areas require a separate risk assessment!
• A hidden area is a “hole in the safety field”. The area must therefore be secured by other
means, mechanically, for example (see
).
• A mechanical construction must be installed to ensure that “shadowing” is not possible
(see
).
• The resolution and thus the safety clearance can only be maintained with a suitable me-
chanical construction around the object in the hidden area.
Object
Mechanical construction
Figure 21: Additional safeguard for the hidden area