Instruction Manual
SG2 EXTENDED
19
2.2.5.
Use of deviating mirrors
The control of any dangerous area, with several but adjacent access sides, is possible using only one safety
device and well-positioned deviating mirrors.
Fig.12 shows a possible solution to control three different access sides, using two mirrors placed at 45° with
respect to the beams.
Fig. 12
The operator must respect the following precautions when using the deviating mirrors:
It is very hard to align the receiver and the transmitter when using deviating mirrors: a tiny angular
shift of the mirror is enough to have a misalignment. For this reason the use of DATALOGIC
AUTOMATION laser pointer is recommended.
The minimum safety distance (S) must be respected for each single section of the beams.
The effective operating range decreases by about 15% by using only one deviating mirror, the
percentage further decreases by using 2 or more mirrors (for more details refer to the technical
specifications of the mirrors used).
The following table shows the operating distances relating to the number of mirrors used.
number of mirrors operating distance
1 16.5
m
2 13.7
m
3 11.6
m
Do not use more than three mirrors for each device.
The presence of dust or dirt on the reflecting surface of the mirror causes a drastic reduction in the
range.
