Configured for optical presence sensing and personnel protection in machine automation zones, the Omron F3SJ-E0785N25 (F3SJ-E Safety Light Curtain) provides direct physical/electrical execution.

Model Numbering & Variant Matrix

The F3SJ series designation defines hardware functionality, protective length, output architecture, and beam spacing across the safety system product line:

• F3SJ-E: Easy type functional family (basic safety sensing without complex software setup).
• 0785: Protective height specification corresponding to 785 mm.
• N: NPN switching output configuration.
• 25: Beam pitch designation of 20 mm yielding a 25-mm diameter detection capability.

Technical Performance Parameters

Deterministic Network Communications & Bus Integration

The unit interfaces with higher-level logic controllers via discrete safety output wiring or integrated fieldbus interfaces. Communication latency and response time execution adhere to strict bus speed constraints. Firmware flash compatibility ensures synchronized operational states across system backplanes, maintaining deterministic response times under emergency stop conditions without bus-induced signal delays.

Deliverables & Ordering Information

• 1 x Omron F3SJ-E0785N25 Emitter
• 1 x Omron F3SJ-E0785N25 Receiver
• 1 x Standard Mounting Bracket Kit
• 1 x Installation Instruction Manual

Field Installation & Wiring Guidelines

Physical Mounting & Alignment

• Mount emitter and receiver units strictly parallel to each other at equal elevation.
• Verify verticality using a spirit level before securing mounting hardware.
• Check path alignment indicator LEDs after powering on to confirm optical alignment across the 0.2 to 7 m range.

Electrical Wiring & Noise Suppression

• Ensure the 24 VDC power supply meets SELV/PELV standards with ripple below 10% p-p.
• Keep high-voltage motor cables and AC power lines isolated from light curtain signal wiring.
• Verify that signal cable shielding is properly grounded at a single point to prevent ground loops.

Technical Questions & Diagnostics

• Q: What is the maximum allowable voltage ripple for the power supply input?

  A: The SELV/PELV power supply must maintain 24 VDC within a +/-20% tolerance, with peak-to-peak ripple not exceeding 10% max to ensure stable internal logic operation.

• Q: Can this unit be swapped or rewired while the control circuit is energized?

  A: No, hot-swapping or live wiring changes are strictly prohibited. Always disconnect power to the safety system before attempting physical replacement or adjusting wire terminations.

• Q: How do you verify proper alignment after physical installation is completed?

  A: Power the system and observe the optical alignment indicators on the receiver display. All sector LEDs must illuminate solid green without flickering under operational conditions.

• Q: What switching architecture does the F3SJ-E0785N25 utilize for safety outputs?

  A: This model utilizes dual NPN solid-state transistor switching outputs designed to sink load current directly to the 0 VDC reference rail during normal clear-path conditions.

• Q: How does ambient light interference affect the optical receiver capability?

  A: The sensor operates at an infrared wavelength of 870 nm. Direct exposure to high-intensity ambient light or strong strobe sources should be optically shielded to avoid nuisance trips.

• Q: What is the maximum current draw for the emitter and receiver units?

  A: For 38 beams, the emitter draws a maximum current of 57 mA, while the receiver draws a maximum current of 45 mA under no-load conditions at 24 VDC input.

• Q: Is external grounding required for the enclosure shell?

  A: Yes, connect the protective earth terminal directly to the machine frame ground using low-impedance copper braid to maintain IP65 rating integrity and noise immunity.

• Q: What detection capability does the 20 mm beam gap provide for safeguard design?

  A: The 20 mm beam gap provides a 25-mm diameter detection capability, making this unit suitable for hand and arm intrusion protection in industrial safety zones.