What the 25 mm detection capability means for guarding
The Omron F3SJ-A1660P25-TS is a safety light curtain from the F3SJ-A series, rated for hand protection with a 25 mm detection capability. That 25 mm figure is the minimum object size the curtain reliably detects — a finger or hand reaching through the beam array triggers a stop signal before it reaches the hazard zone. With 83 beams on a 20 mm pitch covering a 1660 mm protective height, the curtain creates a detection plane that catches intrusions across the full guarded opening. The operating range spans 0.2 m to 7.0 m, so it suits both close-in machine guarding and wider access points where the emitter and receiver sit several metres apart.
Built-in blanking and muting for production flow
This curtain includes blanking and muting functions as standard features. Blanking lets you optically disable specific beams — useful when a fixed obstruction like a machine frame sits in the detection zone and you don't want a false trip. Muting temporarily suspends the safety output while a workpiece passes through the curtain, provided the muting sensors confirm a valid transport condition. For a line where parts must move in and out of a guarded cell without stopping production, having both functions inside the same housing saves an external safety controller module.
Environmental rating and power requirements
Rated IP65 — dust-tight and protected against water jets — so the curtain holds up in washdown environments typical of food processing or automotive assembly lines. The supply is 24 VDC, standard for safety circuits, and the operating temperature window runs from -10°C to 55°C. That range covers most factory-floor conditions but not freezer or outdoor installations without additional climate protection.