Safety light curtains detect personnel via infrared beam arrays — core machine-safety component. SICK MLC500/MLC300/deTec, Pilz PSENopt II, Schmersal SLC440 and Banner EZ-SCREEN lead per IEC 61496 + ISO 13849-1 PL d/e.
Safety Light Curtain
Safety Light Curtain
Safety light curtains detect personnel via infrared beam arrays — core machine-safety component. SICK MLC, Pilz PSEN,...
Safety light curtains detect personnel via infrared beam arrays — core machine-safety component. SICK MLC, Pilz PSEN, Schmersal and Banner lead per IEC 61496 + ISO 13849-1 PL d/e.
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FAQ
Q Type 2 vs Type 4?
A
Type 2 meets PL c / SIL 1 with longer diagnostic interval — low risk only. Type 4 meets PL e / SIL 3 with internal redundancy per scan cycle — mandatory for robots and presses. Almost all machinery exports to Germany require Type 4.
Q Resolution?
A
14 mm finger protection (robot cells, press tool zones); 30 mm hand (packaging, machine-tool loading); 40-90 mm personnel access (warehouse).
Q Safety distance per EN ISO 13855?
A
S = K × T + C. S safety distance; K approach speed (hand 2000, body 1600 mm/s); T total stop time (curtain + PLC + actuator); C resolution penetration. Incorrect distance → machine fails to stop in time.