What this light curtain covers
The 15mm beam pitch and 104 beams create a protective field 1565mm tall, sized to guard a vertical access zone on a machine cell or conveyor infeed. Operating range spans 0.2m to 7.0m, so the emitter and receiver can be set back from the hazard while maintaining reliable detection. Built-in blanking and muting functions allow the curtain to ignore fixed obstructions (e.g., a fixture post) or temporarily suspend the protective field during a material pass-through — typical for automated assembly or palletizing cells where the part must cross the light plane without tripping the safety relay.
What the detection rating means for fit
The 20mm detection capability (per IEC 61496-2) means the curtain reliably detects a 20mm-diameter opaque object anywhere in the field. That qualifies as finger-protection class, not hand-only — a 14mm beam pitch would catch a finger reaching through, but the 15mm pitch here still resolves a 20mm target, which is the certified detection figure. For a buyer matching a safety distance calculation (per ISO 13855), the 20mm figure is the one that drives the minimum mounting distance from the hazard.
Listed as Active by the manufacturer, so this order code is current production — no end-of-life notice, no last-time-buy clock. The F3SJ-A series is a well-established safety light curtain line; the 1565mm protective height and 20mm detection are standard catalog variants, not a special build. For a BOM line that specifies this exact protective height and detection resolution, the F3SJ-A1565P20-TS is the direct fit — no substitution needed, no cross-reference to chase.