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Safety Light Array
3.5 Avoidance of Reciprocal Influence Amongst Several Light Barrier Systems
If a receiver is located within the beam path of a neighboring emitter, reciprocal influence of the sensor function
may occur, thus resulting in erroneous switching and failure of the safety function.
Emitter 1
Emitter 2
Receiver 1
Receiver 2
DANGER!
In order to assure error-free operation of several light barrier systems at a single machine
(i.e. several Connector Units with their respective Safety Light Barriers), the receiver may only be
exposed to light from the emitters of the same light barrier system. In order to assure that this is the
case, a non-parallel arrangement (see figure) or a lateral clearance of at least 2 × m should
be used (see section 3.4).
Shielding from neighboring sensor systems, for example through the use of partitions, may also prevent reciprocal
influence.
Emitter 1
Receiver 2
Receiver 1
Emitter 2
