What it guards and where it fits
As a safety light curtain, the F3SG-4RA1920-14 creates an optical barrier around a hazard zone — typically a robot cell, press, or conveyor infeed. When the beam path is interrupted, the controller triggers a stop signal to the machine safety circuit. The 14 mm resolution means it detects fingers reaching into the guarded area (finger-protection class per IEC 61496-1). This is a standard parameter for hand-protection applications where the operator must reach into the machine but the body stays outside the protected zone.