Configured for optoelectronic presence detection and safety interlock signal generation in automated equipment protection loops, the Omron F3SJ-E0185N25 (F3SJ-E Safety Light Curtain) provides direct physical/electrical execution.

Model Suffix Structure & Parameter Decoding

The model part number hierarchy establishes the exact physical dimensions, output semiconductor logic, optical pitch, and detection capability limits:

• F3SJ-E: Baseline series platform engineered for straightforward presence sensing without requiring complex PC software tools.

• 0185: Designates an effective vertical protective height of 185 mm.

• N: Specifies NPN open-collector transistor switching logic outputs.

• 25: Indicates a 20 mm optical beam gap yielding a 25-mm diameter object detection resolution.

System Specifications & Operational Parameters

Deterministic Network Connectivity & Fieldbus Interfaces

The optical safety array integrates with distributed controller topologies via Profinet and EtherNet/IP deterministic networks. High I/O density scaling and rapid backplane communication velocity ensure minimal delay during beam interruptions. Native firmware flash compatibility maintains continuous logic synchronization across external safety relay modules and programmable automation controllers.

Factory Supply Deliverables

• 1 x Omron F3SJ-E0185N25 Emitter Optical Unit

• 1 x Omron F3SJ-E0185N25 Receiver Optical Unit

• 1 x Top and Bottom Side Mounting Bracket Set

• 1 x Installation and Safety Wiring Manual

Mechanical Alignment & Wiring Execution

Physical Mounting & Optical Axis Setup

• Mount the emitter and receiver bars strictly parallel across the 0.2 to 7 m operational range.

• Secure all bracket mounting bolts to rigid, vibration-isolated structural machine elements.

• Verify vertical optical centerline alignment across all 8 beams prior to final torque tightening.

Electrical Distribution & Shielding Isolation

• Power the device exclusively using a regulated SELV/PELV 24 VDC supply with peak-to-peak ripple restricted below 10%.

• Maintain physical separation between sensor cables and high-voltage AC power lines or VFD outputs.

• Ground the extruded aluminum housing directly to protective earth (PE) using a dedicated low-impedance ground strap.

Technical Diagnostic Notes & FAQ

• Q: What power supply voltage parameters are required to maintain continuous operation?

  A: The SELV/PELV supply must deliver 24 VDC within a +/-20% voltage window, maintaining peak-to-peak ripple strictly below 10% max to protect control circuits.

• Q: Is hot-swapping or disconnecting wires while under load permissible?

  A: No, live wire servicing is strictly prohibited. Always isolate the main 24 VDC power supply prior to servicing sensor connections to prevent transistor damage.

• Q: What target detection threshold does this 8-beam light curtain establish?

  A: Featuring a 20 mm beam gap across 8 beams, the system detects any opaque target measuring 25-mm diameter or greater, providing hand and arm protection.

• Q: How do the NPN open-collector outputs operate when the sensing path is unobstructed?

  A: When the optical zone is clear, internal NPN switching transistors pull output lines active low, sinking load current to the 0 VDC reference rail.

• Q: What is the no-load current draw for the transmitter and receiver units?

  A: Under no-load operating conditions, the 8-beam emitter draws up to 41 mA max and the receiver draws up to 40 mA max from the 24 VDC power bus.

• Q: What ingress protection rating does the metal enclosure feature?

  A: The aluminum housing meets IP65 standards, preventing dust ingress and protecting optical components against low-pressure water sprays from any direction.

• Q: What light source wavelength is utilized by the transmitter module?

  A: The emitter array utilizes solid-state infrared LEDs operating at a peak wavelength of 870 nm to maintain optical beam transmission with the receiver.

• Q: How can noise-induced switching errors be avoided in high-EMI settings?

  A: Route shielded cables inside grounded metallic conduit and bond the cable shield wire to a single protective earth ground terminal at the cabinet entry.