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2TLC172287M0201 Rev B
13 www.abb.com/jokabsafety
2015-09-17
Under normal operating conditions, it must be impossible to start the machine while operators are inside the hazard
zone.
When the installation of the AOPD close to the hazard zone is not possible, a second AOPD must be mounted in a
horizontal position in order to prevent any lateral access, see Figure 8.
Warning! If the operator is able to enter the hazard zone, an additional mechanical protection must be mounted to
prevent the access.
Figure 7
– Incorrect installation
Figure 8
– Correct installation
3.2.1 Minimum installation distance
See paragraph 2.4
– “Minimum installation distance”.
3.2.2 Minimum distance to reflecting surfaces
Reflecting surfaces placed near the light beams of the AOPD (over, under or laterally) can cause passive reflections.
These reflections can compromise the recognition of an object inside the detection zone (see Figure 9).
For example, if the receiver (RX) detects a secondary beam (reflected by the side-reflecting surface), the object might
not be detected, even if the object interrupts the main beam.
NO
YES