The Omron F3SG-4PGA1370-4L is a perimeter access guarding safety light curtain from the F3SG-PG series. It uses 4 infrared beams spaced 400 mm apart to detect intrusion into a safeguarded area, with an operating range of 0.5 to 70 m (typical 110 m). The IP67G rating means the housing and optics can handle high-pressure washdown — it's built for environments where you hose down the machine at the end of a shift. The 400 mm beam spacing is a deliberate choice for perimeter guarding: it catches a person walking into the zone (finger and hand detection need tighter spacing, around 14–30 mm). This is for body presence detection at the boundary, not for point-of-operation guarding. The long range — up to 70 m in standard mode, with a typical maximum of 110 m — suits large warehouse aisles, conveyor perimeters, or vehicle access gates.
The start/restart input is 2 PNP/NPN selectable outputs rated at 300 mA at 24 VDC. That's enough to drive two external contactors or a safety PLC input directly, without an interposing relay. The auxiliary non-safety output is 1 PNP/NPN at 100 mA — useful for a status lamp or a PLC diagnostic input, but don't try to pull a contactor coil through it. Connection is via M12 connector or flying lead — the M12 option is quicker to swap in the field; flying leads are more secure in high-vibration environments. Both are available on this order code, so specify which termination you need when you quote.