SG4E Full Rev01.pdf - Datasensor
SG4E Full Rev01.pdf - Datasensor
SG4E Full Rev01.pdf - Datasensor
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GENERAL INFORMATION<br />
1<br />
1.3 HOW TO CHOOSE THE DEVICE<br />
There are at least three different main characteristics that should be considered when<br />
choosing a safety light curtain, after having evaluated the risk assessment.<br />
1.3.1 Resolution<br />
The resolution of the device is the minimum dimension that an opaque object must have in<br />
order to obscure at least one of the beams that constitute the sensitive area.<br />
The resolution strictly depends on the part of the body to be protected.<br />
R =14mm<br />
finger protection<br />
Type 4<br />
R = 30 mm<br />
hand protection<br />
Type 4<br />
As shown in Fig. 1, the resolution only depends on the geometrical characteristics of the<br />
lenses, diameter and distance between centres, and is independent of any environmental<br />
and operating conditions of the safety light curtain.<br />
d<br />
I<br />
opaque<br />
object<br />
R<br />
Operating Distance<br />
Fig. 1 – Resolution<br />
The resolution value is obtained applying the following formula:<br />
R = I + d<br />
where:<br />
I = Distance between two adjacent optics<br />
d = Lens diameter<br />
3
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