FS-N41C Keyence Digital Fiber Optic Sensor Amplifier IO-Link

Keyence FS-N41C Digital Fiber Optic Sensor Amplifier — M8 Connector with IO-Link

Technical Specifications

• Brand: Keyence
• Model: FS-N41C
• Series: FS-N40
• Category: Digital fiber optic sensor amplifier
• Type: M8 connector, main unit
• Control outputs: 2 outputs; output 2 and external input share selection
• External input: 1 input; selectable with output 2
• 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
• Control output rating: Open-collector, 30 V max, 100 mA max per output
• External input timing: 2 ms ON / 20 ms OFF or longer
• Supply voltage: 10 to 30 VDC, ripple 10% P-P or less, Class 2 or LPS
• Power consumption: 910 mW or less (36 mA at 24 V); ECO ON 840 mW; ECO FULL 750 mW
• Operating temperature: -20 to +55 °C, no freezing
• Weight: Approx. 25 g
• Lifecycle status: Active; Keyence production status verified September 2026

IO-Link Communication and Interference Resistance

• The FS-N41C supports IO-Link V1.1 at COM2 speed (38.4 kbps) through its built-in M8 port.
• IO-Link cable runs reach up to 20 m, while standard cable runs extend to 30 m.
• Open-collector outputs tolerate 30 V and 100 mA per channel, which suits diverse load types.
• The red four-element LED at 660 nm maintains stable detection across varied fiber units.
• Fast 23 µs response in S-HSPD mode supports high-speed counting and positioning tasks.
• Eight selectable response modes let users balance speed against noise immunity.
• Keyence builds the FS-N40 series for reliable operation in industrial control cabinets.

Installation Guide

• Mount the amplifier on a DIN rail or bracket, then confirm the M8 connector seats firmly.
• Wire the supply within 10 to 30 VDC and observe Class 2 or LPS source requirements.
• Keep ripple below 10% P-P to protect the internal sensing circuit.
• Assign output 2 or the external input according to your control scheme.
• Set the response mode to match your cycle time, starting with FINE for general use.
• Verify input pulses last at least 2 ms ON and 20 ms OFF.
• Operate within -20 to +55 °C and avoid condensation or freezing conditions.

Package Contents

• 1 × Keyence FS-N41C amplifier main unit
• 1 × M8 connector interface as built into the unit
• 1 × Quick reference documentation
• Ships via FedEx, UPS, or DHL

FAQ

• Q: What is the fastest response time of the FS-N41C?
  A: It reaches 23 µs in S-HSPD mode, and slower modes extend up to 64 ms.
• Q: Does the FS-N41C support IO-Link?
  A: Yes, it runs IO-Link V1.1 at COM2 speed over the M8 connector.
• Q: How many outputs does this amplifier provide?
  A: It offers two control outputs, with output 2 shareable as an external input.
• Q: What supply voltage does the FS-N41C require?
  A: It accepts 10 to 30 VDC with 10% P-P ripple or less.
• Q: What operating temperature range applies?
  A: The unit works from -20 to +55 °C without freezing.
• Q: Is this item new and in stock?
  A: We supply brand-new original units, keep stock on hand, and ship within 5 days.
• Q: What shipping and return terms apply?
  A: We ship via DHL and similar carriers, and we accept returns within 30 days.