KEYENCE FS-N41P FS-N40 Series Digital Fiber Amplifier Cable Type PNP Main Unit

KEYENCE FS-N41P is a digital fiber optic sensor amplifier from the FS‑N40 series. It serves as the main unit for non‑contact detection of small parts, transparent objects, and registration marks in industrial automation systems. Cable type with a single PNP open‑collector output and built‑in red 4‑element LED (660 nm wavelength). Selectable response time from 23 µs (S‑HSPD) to 64 ms (TERA) to match application speed requirements. Up to 16 expansion units can be connected, making it suitable for multi‑sensor configurations.

Applications:

• Electronic component detection in semiconductor and PCB assembly

• Positioning and verification in automotive parts manufacturing

• Packaging material presence inspection

• High‑speed part counting in pharmaceutical and medical device production

• Transparent object and registration mark detection

Core Specifications:

Advanced Specifications:

Output Ratings

• Output current: 100 mA max. per output, 100 mA total for 2 outputs (stand‑alone) / 20 mA (expansion)

• Residual voltage: ≤ 1.6 V (≤ 10 mA) / ≤ 2.2 V (10‑100 mA)

Power Supply

• Power voltage: 10 – 30 V DC, Class 2 or LPS

• Power consumption:

  • Normal: ≤ 910 mW (≤ 36 mA at 24 V / ≤ 65 mA at 12 V)

  • ECO ON: ≤ 840 mW (≤ 33 mA at 24 V / ≤ 60 mA at 12 V)

  • ECO FULL: ≤ 750 mW (≤ 30 mA at 24 V / ≤ 52 mA at 12 V)

Expansion & Protection

• Unit expansion: Up to 16 units (17 total including main unit)

• Protection circuits: Reverse power connection, output overcurrent, output surge, reverse output connection

• Mutual interference prevention: S‑HSPD/HSPD: 0 units; FINE: 4 units; TURBO/SUPER/ULTRA/MEGA/TERA: 8 units

Environmental

• Ambient light: Incandescent ≤ 20,000 lux, Sunlight ≤ 30,000 lux

• Ambient temperature: –20 °C to +55 °C (1‑2 units)

• Vibration resistance: 10‑55 Hz, 1.5 mm amplitude, 2 hours each axis

• Shock resistance: 500 m/s², 3 times each axis

• Case material: Polycarbonate

• Weight: Approx. 78 g

System Integration:

• This amplifier belongs to the KEYENCE FS‑N40 series of digital fiber optic sensors.

• Cable‑type main unit (2 m cable) for direct wiring to power and control systems.

• DIN rail mounting compatible (standard 35 mm DIN rail).

• Compatible with KEYENCE FU series fiber optic cables (through‑beam, retro‑reflective, diffuse reflective).

• Up to 16 FS‑N series expansion units can be connected to a single FS‑N41P main unit. Two‑output expansion units count as two units.

• For multi‑unit configurations, ambient temperature limits depend on the number of connected units.

Standards & Compliance:
UL and C‑UL certified (UL508, CSA C22.2 No.14). The power source must be UL Listing certified for Class 2 output per NFPA70. Refer to manufacturer official documentation for detailed certification and compliance information.

Related Products:

• FS‑N series expansion units – For multi‑channel detection systems

• FU series fiber optic cables – Through‑beam, retro‑reflective and diffuse types

• OP‑73880 – Mounting bracket for wall installation