Principles, Standards and Implementation

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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
Formula

The minimum safety distance is dependent on the time required to process the Stop command and how far the operator can penetrate the detection zone before detection. The formula used throughout the world has the same form and requirements. The differences are the symbols used to represent the variables and the units of measure.

The formulas are:

ISO EN:S =K x T+ C

US CAN: Ds =K x(Ts + Tc + Tr + Tbm) + Dpf

Where:

Ds and S are the minimum safe distance from the danger zone to the closest detection point.