VoltCheck24 Engineering Calculator

Safety Light Curtain Minimum Distance Calculator

Estimate minimum safety distance using detection resolution, approach speed, sensor response, and machine stopping time.

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How to use this calculator

  1. Collect the values below from the equipment nameplate, data sheet, or field measurement.
  2. Enter values using one consistent unit system and use worst-case operating conditions.
  3. Review the result, margin, and engineering note before selecting hardware.
  4. Cross-check the result with the related calculator and save the review for your project record.

Input checklist

Example field question

Use this calculator when a design review or site issue requires a quick engineering check before a detailed manufacturer selection.

Common mistakes to avoid

Do not mix nominal values with measured worst-case values. Keep units consistent and include cable, temperature, duty, and derating assumptions where applicable.

Standards and validation

Review the result against local codes, IEC/NEC/NFPA/ISO practices when applicable, project specifications, and the latest manufacturer data sheet.

Recommended workflow

Start with the primary calculation, then use the related tool to check the next design dependency. Save or print the result only after the assumptions and worst-case conditions are confirmed.

Start with the primary inputsCheck the related dependency

Formula and Inputs

Minimum distance is derived from approach speed multiplied by total response and stopping time, plus the applicable intrusion and resolution factors.

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.