What this light curtain covers
The Omron F3SJ-B1585N25 is a Type 4 safety light curtain from the F3SJ-B series, rated for hand detection with a 25mm detection capability. That 25mm figure means it catches a hand or finger reaching into the hazard zone — it's the standard resolution for hand-protection applications per IEC 61496-1. The 78 beams at 20mm pitch create a 1585mm protective height, so it guards a full vertical zone from about floor level to shoulder height on a standing operator. Operating range spans 0.2m to 7.0m, which covers most machine guarding distances from close-in press feeds to wider conveyor access points. The 24VDC supply is standard for safety circuits — matches what most safety relays and PLC safety inputs expect.
Where it goes and what it handles
IP65 rating means the housing and optics withstand washdown and dust ingress — suitable for food processing lines, packaging areas, or any environment where hoses are used for cleaning. Built-in blanking and muting functions let you configure fixed or floating blanking zones (to ignore a fixture passing through the beam) and muting sensors for material handling pass-through. That saves adding an external muting module — the logic is onboard.