Keyence FS-N41P Digital Fiber Optic Sensor

The Keyence FS-N41P is a high-speed digital fiber optic sensor amplifier, engineered for precise and stable detection in industrial automation applications. Featuring ultra-fast 23 µs response, energy-efficient operation, and expandable connectivity for up to 16 units, this sensor is ideal for high-speed production, packaging, and precision presence detection.

Technical Specifications

Manufacturer: Keyence
Product Series: FS-N Series
Model: FSN41P
Type: Cable-Type Digital Fiber Optic Sensor Amplifier
Output Type: PNP
Unit Type: Main Unit

Performance & Response Time

• Response Time Modes:
  • S-HSPD: 23 µs
  • HSPD: 50 µs
  • FINE: 250 µs
  • TURBO: 500 µs
  • SUPER: 1 ms
  • ULTRA: 4 ms
  • MEGA: 16 ms
  • TERA: 64 ms
• Light Source:
  • Type: Red Four-Element LED (660 nm Wavelength)

Input & Output Functions

• Control Outputs: 1 (Open Collector, 30 VDC Max, 100 mA Max)
• Residual Voltage:
  • ≤ 1.6 V @ ≤10 mA
  • ≤ 2.2 V @ 10–100 mA
• External Input Timing: ≥ 2 ms (ON), ≥ 20 ms (OFF)

Unit Expansion & Interference Prevention

• Expansion Capacity: Up to 16 expansion units (17 total incl. main)
• Mutual Interference Prevention:
  • S-HSPD / HSPD: Not supported
  • FINE: Up to 4 units
  • TURBO to TERA: Up to 8 units
    (Values double when “Double” mode is active)

Power Supply & Consumption

• Power Voltage: 10 to 30 VDC (Ripple P-P ≤10%, Class 2 or LPS)
• Power Consumption:
  • Normal: 910 mW (36 mA @ 24 V / 65 mA @ 12 V)
  • Eco ON: 840 mW (33 mA @ 24 V / 60 mA @ 12 V)
  • Eco FULL: 750 mW (30 mA @ 24 V / 52 mA @ 12 V)

Environmental Resistance

• Ambient Light Resistance:
  • Incandescent: 20,000 lux Max
  • Sunlight: 30,000 lux Max
• Operating Temperature:
  • -20°C to +55°C (Max temp varies by unit count)
  • Up to 2 units: +55°C
  • 3–10 units: +50°C
  • 11–16 units: +45°C
• Relative Humidity: 35% to 85% RH (No Condensation)
• Vibration Resistance: 10–55 Hz, 1.5 mm double amplitude, 2 hours each axis
• Shock Resistance: 500 m/s², 3 times per axis

Material & Construction

• Case Material: Polycarbonate
• Cable Material: PVC
• Weight: Approx. 78 g

Key Features & Benefits

✅ Ultra-Fast Detection: Response time as low as 23 µs for high-speed applications.

✅ Flexible Output Configurations: Adjustable PNP open-collector outputs.

✅ Energy-Efficient Modes: Eco options reduce power consumption without affecting performance.

✅ Robust Industrial Durability: Withstands high shock and vibration in industrial environments.

✅ Expandable System: Supports up to 16 expansion units for scalable installations.

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