Formula and Inputs
Minimum distance is derived from approach speed multiplied by total response and stopping time, plus the applicable intrusion and resolution factors.
VoltCheck24 Engineering Calculator
Safety Light Curtain Minimum Distance Calculator
Estimate minimum safety distance using detection resolution, approach speed, sensor response, and machine stopping time.
How to use this calculator
- Collect the values below from the equipment nameplate, data sheet, or field measurement.
- Enter values using one consistent unit system and use worst-case operating conditions.
- Review the result, margin, and engineering note before selecting hardware.
- Cross-check the result with the related calculator and save the review for your project record.
Input checklist
- Detection resolution
- Approach speed
- Sensor and logic response time
- Measured machine stopping time
Industrial Use Cases
Use this tool for robot cells, presses, conveyors, guarded automation, and machine access protection studies.
Engineering Note
Final safety validation must use the current risk assessment, ISO 13855, ISO 13849-1 or IEC 62061, measured stopping time, and the certified safety device manual.
FAQ
Can I use a nominal machine stop time?
Use the worst measured stopping time, including brake wear, load variation, temperature, and control-system response.
Does this calculator certify a safety function?
No. It supports preliminary distance review; a competent safety engineer must validate the complete safety function.
Preliminary engineering reference only. Confirm final selections against current standards, project specifications, and manufacturer data.