FS-N44N Keyence Expansion Amplifier NPN Output

Keyence FS-N44N Fiber Optic Sensor Amplifier – Expansion Unit, Dual Output, OLED Display

Technical Specifications

• Brand: Keyence
• Model: FS-N44N
• Series: FS-N40
• Category: Digital fiber optic sensor amplifier
• Output type: NPN open-collector
• Control outputs: 2 (dual output)
• External input: 1 channel
• Unit type: Expansion unit (cable type)
• Response time: 23 µs (S-HSPD), 50 µs (HSPD), 250 µs (FINE), 500 µs (TURBO), 1 ms (SUPER), 4 ms (ULTRA), 16 ms (MEGA), 64 ms (TERA)
• Light source: Red four-element LED, 660 nm wavelength
• Supply voltage: 10–30 VDC, ripple 10% P-P or less, class 2 or LPS
• Power consumption: 870 mW or less (34 mA at 24 V; ECO ON 800 mW; ECO FULL 710 mW)
• Control output rating: 30 V max, 100 mA max per output; residual voltage 1.4 V at 10 mA, 2 V at 10–100 mA
• External input timing: 2 ms ON / 20 ms OFF or longer
• Operating temperature: -20 to +55 °C, no freezing, derates with expansion
• Unit expansion: Up to 16 units (17 total including main; dual output counts as 2)
• Weight: Approx. 73 g
• Communication ports: None built in, no protocols supported

Performance and Environmental Notes

• The 23 µs response supports high-speed detection and precise timing tasks.
• The 660 nm red LED delivers stable light for consistent sensing results.
• Dual NPN outputs run two independent switching functions from one module.
• Open-collector outputs handle up to 30 V and 100 mA per channel.
• The unit works from -20 to +55 °C and derates as you add expansions.
• Power draw stays low at 870 mW or less, which keeps control panels cool.
• No built-in communication ports keep wiring simple and reduce failure points.

Installation Guide

• Connect the expansion unit to a compatible Keyence FS-N40 main amplifier first.
• Mount the module on a DIN rail or bracket and secure the cable.
• Feed the 10–30 VDC supply and follow the class 2 or LPS requirement.
• Wire NPN outputs to your PLC or load within 30 V and 100 mA.
• Keep external input pulses at 2 ms ON and 20 ms OFF or longer.
• Count each dual-output unit as two when planning the 16-unit limit.

Packing List

• 1 × Keyence FS-N44N expansion unit
• 1 × Instruction manual
• 1 × Protective packaging
• Shipping via FedEx, UPS, or DHL

FAQ

• Q: Can the FS-N44N work on its own?
  A: No, it is an expansion unit and needs a compatible FS-N40 main amplifier.
• Q: What is the fastest response time?
  A: It reaches 23 µs in S-HSPD mode and 64 ms in TERA mode.
• Q: How many outputs and inputs does it offer?
  A: It provides two NPN control outputs and one external input.
• Q: What supply voltage does it require?
  A: It runs on 10–30 VDC with 10% ripple or less.
• Q: How many units can I connect in total?
  A: You can link up to 16 units for 17 total, counting dual output as two.
• Q: What is the operating temperature range?
  A: It works from -20 to +55 °C without freezing.
• Q: Is the product new and in stock?
  A: Yes, it is brand new and original, and we hold stock.
• Q: How fast do you ship, and which carriers do you use?
  A: We ship within 5 days via DHL, FedEx, UPS, and similar carriers.
• Q: What is your return policy?
  A: We support returns within 30 days of delivery.