Emitter And Receiver Orientation; Use Of Deviating Mirrors - Datasensing SH4 BASE-STANDARD Product Reference Manual

Emitter and receiver orientation

The two units shall be assembled parallel each other, with the beams arranged at right
angles with the emission and receiving surface, and with the connectors pointing to the
same direction.
The configurations shown in the figure must be avoided:

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 mir-
ror placed at 45° with respect to the beams.
The operator must respect the following precautions when using the deviating mirrors:
•
•
•
•
The following table shows estimated operating distances relating to the number of mir-
rors used.
NO. OF MIRRORS
•
Figure 14: Wrong light curtain TX-RX orientations
Mirror
Figure 15: Use of 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 con-
ditions.
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.
OPERATING DISTANCE (14mm)
0
1
The presence of dust or dirt on the reflecting surface of the mirror causes a drastic
reduction in the range.
GENERAL INFORMATION ON DEVICE POSITIONING
DANGEROUS
AREA
OPERATING DISTANCE (30mm)
10 m
8 m
20
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