What it is and what the ratings mean for fit
The Omron F3SJ-A1745P30 is a type-4 safety light curtain from the F3SJ-A series, designed for hand and arm detection at industrial guarding points. Its 30 mm detection capability means it reliably catches a hand or forearm reaching into the hazard zone — that is the finger-safe threshold per IEC 61496-1 for hand protection, not just presence detection. The 1745 mm protective height and 70 beams at a 25 mm pitch cover a full standing-height access area, so a single unit spans a machine opening without stacking multiple curtains.
Deployment context and sourcing posture
Rated IP65 for dust-tight and water-resistant duty, this curtain handles washdown environments in food processing or automotive lines where hose-down cleaning is routine. The 24 VDC supply and 0.2 m to 7.0 m operating range suit it for guarding press brakes, assembly stations, and robotic cells where the emitter and receiver mount on opposite sides of the access opening. Blanking and muting functions are built in, so it integrates with automated guided vehicle (AGV) zones or conveyor pass-throughs without an external controller — the muting sensors connect directly to the curtain's dedicated inputs.