Banner EZ-SCREEN­ Safety Light Curtain Systems - Manual (Page 20)

Use of Corner Mirrors
EZ-SCREEN Type 2 Systems may be used with one or more cor-
ner mirrors. The use of glass-surface corner mirrors reduces the
maximum specified emitter/receiver separation by approximately 8
percent per mirror, as follows:
SSM and MSM Series Glass-Surface Mirrors
Corner Mirrors Max. Emitter / Receiver
Range
1 13.8 m (45')
2 12.7 m (42')
3 11.7 m (38')
4 10.8 m (35')
Mirrors are not allowed for applications that would allow personnel undetected access into the safeguarded area.
If mirrors are used, the difference between the angle of incidence from the emitter to the mirror and from the mirror to the receiver must
be between 45° and 120°. If placed at a sharper angle, as shown in the example, an object in the light screen may deflect beam(s) to the
receiver, preventing the object from being detected (that is, "false proxing"). Angles greater than 120° result in difficult alignment and
possible optical short circuits.
WARNING: Avoid Retroreflective Installation
Do not install emitters and receivers in "retroreflective" mode, with less than a 45° angle of incidence, as
shown.
Sensing could be unreliable in this configuration; an increased risk of harm could result.
Recommended sensor
configuration angle
Emitter
Emitter
Receiver
Receiver
Mirror Mirror
A
45° < A < 120°
Figure 6. Never use EZ-SCREEN Type 2 sensors in a retroflective mode.
EZ-SCREEN® Type 2 Light Screen Instruction Manual
20 www.bannerengineering.com - tel: 763-544-3164 122452 rev. B