Catalogs > Safety Products Catalog > Principles, Standards and Implementation > Safety Distance Calculation
Safety Distance Calculation
| Introduction |  |
Formula | |
Directions of Approach | |
Speed Constant | |
Stopping Time | |
Depth Penetration Factor | |
| Reach Through Applications | |
Single or Multiple Beams | |
Distance Calculations | |
Angled Approaches | |
Safety Mats | |
Examples | |
When larger object sensitivities are used, the US CAN and ISO EN standards differ slightly on the depth penetration factor and the object sensitivity. Figure 108 summarizes the differences. The ISO EN value is 850mm where the US CAN value is 900 mm. The standards also differ in the object sensitivity. Where the ISO EN standard allows for 40 to 70 mm, the US CAN standard allows up to 600 mm.
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| Figure 108: Depth Penetration Factors for Reach-Through Applications |
Reach-Over Applications
Both standards agree that the minimum height of the lowest beam should be 300 mm, but differ with respect to the minimum height of the highest beam. The ISO EN states 900 mm, whereas the US CAN states 1200 mm. Figure 109 summarizes the differences.
The value for the highest beam seems to be moot. When considering this to be a reach-through application, the height of the highest beam will have to be much higher to accommodate an operator in a standing position. If the operator can reach over the detection plane, then the reach over criteria applies.
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| Figure 109: Depth Penetration Factors for Reach-Over Applications |