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Figure 3-7 Minimum safety distance (D)
Scanning distance (L)
Minimum distance (D)
0,2 m to 3,0 m (8 in to 10 ft)
105 mm (4.1 in)
3,5 m (11.5 ft)
123 mm (4.8 in) D = tan2° x L
If L ≥ 3 m, the distance can be deduced from the graph below.
Distance L between sensing units A and B (in m)
3.5.
Mounting considerations
This section discusses optical alignment and mounting considerations. There are several different ways to mount the FF-LS
Series safety light curtains (singularly, in groups, and in several different orientations).
IMPROPER MACHINE PROTECTION (FF-LS30 ONLY)
The arrow labels located on the sides of the sensing units define the active sensing zone of the FF-LS30 Series light
curtain. The yellow tape located on the front plate of the sensing units defines an inactive non-sensing area. When providing
protection, ensure the danger zone is completely protected and within the sensing zone of the FF-LS30.
Ensure the arrows on sensing units A and B are properly aligned.
Failure to comply with these instructions could result in death or serious injury.
3.5.1.
Optical alignment procedure
Proper optical alignment of the FF-LS Series safety light curtains ensures optimum operation. Sensing units A and B must
o
be parallel, at the same height and plane of the beams, and with an angular displacement of no more than +2
. See Figure
3-8 for proper optical alignment. Perform alignment as follows:
Turn one of the sensing units around its longitudinal axis in both directions to locate the point where the sensing field is
interrupted.
Center the sensing unit between the two points of interruption for optimal adjustment.
Repeat steps 1 and 2 for the other sensing unit.
20
107022-16 EN FR26 GLO 301 Printed in Germany
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