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Lesson Plan


Safety Light Screens

(40 minutes)

Introduction (3 p.)
The Basics (11 p.)
Sensing Capability (11 p.)
Functions (8 p.)
Circuitry (10 p.)
Application (12 p.)
Choosing a Light Screen (9 p.)
Conclusion (2 p.)

Safety Light Screens > Sensing Capability
Low-Resolution Detection Capability
Orientation: Low-resolution safety light screens should be positioned vertically to be able to detect a torso or an entire body.

Application: These systems are used when it is not necessary to detect a hand or an arm reaching towards the identified hazard. A low-resolution safety light screen is usually a "multiple-beam" or "grid" system.

Separation Distance: A low-resolution optical safety systems cannot reliably detect the intrusion of a finger, hand or arm. Therefore a Dpf equal to the length of an arm, normally 900-1200 mm, must be included in the separation distance calculation.

Sensing Capability: Sensing capability for low-resolution guarding usually requires a minimum of two beams, but typically require three or four beams to minimize separation distance.

Low-resolution system

 
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