Connecting devices
Wieland Electric GmbH | BA000966 | 07/2016 (Rev. C)
Illustration 22: Minimum distance "a" as a function of distance "D" for testable single-beam safety light barriers with 10°
aperture angle
Diagrams of the safety light barriers can be found in the respective operating instructions.
Avoid interaction between single-beam safety light barriers and between cascades
• If multiple single-beam safety light barrier pairs are used, the aperture angle of the sen-
sors must absolutely be noted in order to prevent interaction.
• If the transmitter is only installed on one side, the light beams must not overlap on the
receiver side so that the light beam of the transmitter reaches two receivers.
• With reciprocal installation of the transmitter and receiver, ensure that the light beam of
transmitter S1 cannot be received by receiver R3 and that the light beam of transmitter
S3 cannot be received by receiver R1.
Illustration 23: Installation so as to prevent optical interaction