Datalogic SG4 BASE - Use of Deviating Mirrors

SG4 BASE
23/73
2.2.4 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.
The figure shows a possible solution to control two different access sides, using one mirror placed at 45° with
respect to the beams.
Fig 19 - Use of deviating mirrors
The operator must respect the following precautions when using the deviating mirrors:
• The alignment of the emitter and the receiver can be a very critical operation when deviating mirrors are used.
Even very small displacements of the mirror is enough to lose alignment.
• The use of DATASENSING laser pointer accessory is recommended under these conditions.
• The minimum safety distance (S) must be respected for each single section of the beams.
• The effective operating range decreases by about 20% by using only one deviating mirror.
The following table shows estimated operating distances relating to the number of mirrors used.
Number of mirrors Operatin
g
Distance
(
14mm
)
Operatin
g
Distance
(
30mm
)
0 6.0 m 19 m
1 4.8 m 15.2 m
• The presence of dust or dirt on the reflecting surface of the mirror causes a drastic reduction in the range.