The F3SJ-A1120P55 is a Type 4 safety light curtain from Omron's F3SJ-A series, designed for leg and body protection on access points to hazardous machinery. Its 55 mm detection capability means it reliably detects a human leg or torso entering the field — this is the finger/hand protection class per IEC 61496-2, so it is sized for perimeter guarding, not hand-in-die applications. The 1120 mm protective height and 50 mm beam pitch (23 beams total) cover a standard doorway or conveyor access zone up to 9.0 m range. Rated IP65 (dust-tight, water-resistant) means the emitter and receiver housings withstand washdown from hoses and splashing — suitable for food processing lines, packaging floors, or outdoor conveyor gantries where moisture and dust are present. The 24 VDC supply is standard for safety circuits; the blanking and muting functions let you mask fixed obstructions (e.g., a machine frame) or temporarily bypass the curtain during a material pass cycle without removing the safety function.
Omron F3SJ-A1120P55 Safety Light Curtain, 55mm Detection, 11
MPNF3SJ-A1120P55
End of Life
Omron F3SJ-A series safety light curtain, F3SJ-A1120P55, 55mm detection capability, 1120mm protective height, 50mm beam pitch, 23 beams, IP65, 24VDC.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Series | F3SJ-A |
| Parameter | Value |
|---|---|
| Detection capability (resolution) | 55mm |
| Protection | Leg/Body |
| Protective height | 1120mm |
| Operating range (sensing distance) | 0.2m ~ 9.0m |
| Number of beams | 23 |
| Beam pitch | 50mm |
| Features | Blanking, Muting Function |
| Parameter | Value |
|---|---|
| Supply voltage | 24VDC |
| Parameter | Value |
|---|---|
| Operating temperature | -10°C ~ 55°C |
| Ingress protection (IP) | IP65 - Dust Tight, Water Resistant |
Product details
Frequently asked questions
What is the detection capability and what does it protect?
The detection capability is 55 mm, which means it is rated for leg and body protection. It will detect a human leg or torso entering the field but is not suitable for hand or finger detection — those require a finer beam pitch (14 mm or 30 mm).
What is the protective height and operating range?
Protective height is 1120 mm. Operating range is 0.2 m to 9.0 m, covering most machine access openings and conveyor zones.
What ingress protection does it carry?
IP65 — dust-tight and protected against water jets. Suitable for washdown environments in food and beverage or outdoor use.
MPN
F3SJ-A1120P55