Safety Light Curtain Minimum Distance
At Right Angles to Approach
Interactive Tool acc. to ISO 13855
S = v∙T + c
Above graphic shows general concept only. Minimum distance shown is hard to implement: Finger protection (d = ∅14 mm), very fast reaction time, and almost instantaneous stopping are all required. Larger distances impede ergonomy. Contact Engineering Consultant Wolfgang Grassberger for expert help on these topics:
- Estimating overall stopping performance
- Heigth of upper edge (reaching over)
- Height of lower edge (crawling under)
- Stepping through
- Required Performance Level PLr
- Proving PL in SISTEMA
- Requirements for muting acc. DIN EN IEC 61496-1
- Light curtains with starting function acc. DIN EN ISO 12100
- Validation acc. DIN EN ISO 13849-2
- Regular Testing
Relevant Parameters
Back to tool- Stopping Performance T
- Timespan from actuation of a safeguard until dangerous movement has stopped completely. Overall System Stopping Performance in ISO 13855.
- Detection Capability d
- Smallest item that actuates safeguard. Sensor Detection Capability in ISO 13855.
- Approach Speed v
- Speed taken into account when reaching through a safeguard. Approach Speed Parameter K in ISO 13855.
- Intrusion Distance c
- Distance up to which a safeguard is not yet activated by reaching through.
- Height h
- Height of hazard above floor level. Height a of Hazard Zone in ISO 13855.
- Height H
- Height of upper edge of a safeguard above floor level, to prevent reaching over. Height b of the safeguard in ISO 13855.
- Minimum Distance S
- Distance between a safeguard and the hazard. Required to stop machine movement in time before hazard can be reached.
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