2TLC172287M0201 Rev B 14 www.abb.com/jokabsafety
2015-09-17
Figure 9 – Distance to reflecting surfaces
It is thus important to respect a minimum distance between the AOPD and reflecting surfaces. The minimum distance,
D
sr
, depends on the:
operating distance between transmitter (TX) and receiver (RX),
effective aperture angle (EAA) of the AOPD:
For a type 4 AOPD, EAA
MAX
= 5° (α = ± 2.5°).
The diagram below shows the minimum distance to the reflecting surface (D
sr
), based on the operating distance for a
Type 4 AOPD:
Figure 10 – Minimum distance to a reflective surface as a function of the operating distance
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