KEYENCE FS-N41N Digital Fiber Amplifier

Produktkategorie: FS-N40 Series Digital Fiber Amplifier, Cable Outlet Main Unit, NPN-Ausgang

Kernanwendung: Used with various KEYENCE fiber heads (Durchgangsstrahl / reflektierend) to detect tiny objects, transparent parts, Etiketten, edges and liquid levels. Widely applied in automated production lines, Verpackung, semiconductor and 3C equipment.

✅ Model Interpretation

FS: Fiber Sensor Series

N40: FS-N40 amplifier platform

1: Haupteinheit (usable standalone, expandable via cascade connection)

N: NPN-Open-Collector-Ausgang

Cross-reference within series: FS-N41P (PNP main unit); FS-N42N/N42P are expansion units and cannot work independently.

📋 Wichtige elektrische Spezifikationen

🛠️ Features

1. Duale Digitalanzeige: Real-time indication of received light value + Schwelle, one-touch AUTO threshold setting, manual fine adjustment available; L-ON/D-ON light-on / dark-on mode switchable.
2. Multi-speed response: High-speed mode for high-speed production lines with tiny workpieces; low-speed mode provides stronger noise immunity for reflective and transparent materials.
3. Cascade networking: FS-N41N main unit can be connected in series with FS-N42N expansion units; bis zu 8 units under TURBO mode to save wiring space.
4. Saturation suppression: Eliminates saturation issues for highly reflective targets to enable stable detection of mirror surfaces and transparent films.
5. No external input terminal: Pure fiber detection amplifier without external trigger input.

🧩 Compatible Fiber Head Selection (Gängige Modelle)

Einweglichtschranke: FT-FM2, FT-FM3, FT-KV840, usw.

Reflective: FU-35FA, FU-66, FU-77, FU-49, usw.

Fiber heads are sold separately and NOT included with FS-N41N amplifier.

📌 Wiring Definition (4-core cable type)

Braun: DC24V+

Blau: DC0V

Schwarz: NPN-Signalausgang

Weiß: Unbenutzt (empty)

NPN-Ausgang: The black wire conducts to 0V when a target is detected; PLC input module shall use sink input.

⚠️ Fehlerbehebung

1. Keine Anzeige: Check brown/blue power lines, verify voltage and cable damage.
2. No detection signal: Dirty fiber end face, excessive fiber bending, misaligned fiber head; check L-ON/D-ON mode.
3. Falsche Auslösung: Reduce response speed, enable anti-interference; avoid direct strong ambient light on fiber head; enable saturation suppression for highly reflective targets.
4. Multiple units mounted adjacently: Activate mutual interference prevention to avoid optical crosstalk.

📎 Alternative / Kompatible Modelle

PNP version in same series: FS-N41P

Upgrade series: FS-N10 series; FS-V31 (classic older fiber amplifier with similar functions, different appearance)

Inländische Alternativen: Autonics BF series, Delta fiber amplifiers. Menu logic and response characteristics are not fully identical, program and mounting need re-commissioning.

FS-N40 Full Series Model Comparison Table

Serienübersicht: Digital fiber amplifier; Main units work standalone; expansion units must be cascaded after main unit and cannot operate independently.

✅ Model Coding Rules

1. 41 / 43 = Main unit; 42 / 44 / N40 = Expansion unit
2. 1 = Single output; 3 = Dual output
3. N = NPN; P = PNP; C = M8 connector with NPN/PNP switchable

Standardkabellänge: 2M

📌 Cascade Rules

Maximum cascaded quantity: Bis zu 17 units including main unit; dual-output models (43/44) consume 2 unit quotas.

Multiple units installed side by side: Enable anti-interference function to prevent optical crosstalk between adjacent amplifiers.

Stromversorgung: Only the first main unit needs DC24V input; subsequent expansion units draw power via side bus.

📊 Quick Selection Guide

Single-point detection for sink-type PLC input: FS-N41N

Single-point detection for source-type PLC input: FS-N41P

Dense multi-point detection to save wiring: Haupteinheit + FS-N42N/P expansion

Erfordern 2 independent signal outputs and external input setting: FS-N43N/P

Connector mounting without cable cutting: FS-N41C

📎 Compatible Fiber Head Categories (Universal for FS-N40)

Reflective FU series: FU-35FA / FU-66 / FU-77 / FU-49 / FU-20

Through-beam FT series: FT-FM2 / FT-FM3 / FT-KV840

FS-N41N Application Scenarios

FS-N41N is a NPN single-output main fiber amplifier. Paired with different fiber heads (Durchgangsstrahl / reflektierend / small-spot / side-view), it solves detection tasks in confined spaces, tiny workpieces, transparent materials and high-speed production lines. NPN output is compatible with sink-type PLC inputs.

🏭 Industry Coverage

3C-Elektronik, Halbleiter, Verpackung & Drucken, Lithiumbatterie, Essen & pharmazeutisch, Automobilteile, custom automation equipment.

🧩 Typical Detection Applications

1. Presence / Positionserkennung (Am häufigsten)

Electronic components: Detect presence/position of resistors, Kondensatoren, chips, connector pins and tiny plastic parts

Verpackung: Check presence of packaging bags, Kartons, caps and labels; missing tablet inspection for blister packs

Materialtransport: Workpiece in-position signal on belt/rail to trigger subsequent PLC actions

Recommended fiber: FU-35FA, FU-66 reflective; FT-FM2 through-beam; select S-HSPD 23μs high-speed response for high-speed production lines

2. Transparent / Semi-transparent Object Detection (Film, HAUSTIER, Glas)

Ordinary photoelectric sensors struggle to distinguish transparent film, plastic bottles, glass sheets and transparent tapes. Fiber sensors capture light transmission variation; enable saturation suppression to resolve saturation for highly reflective surfaces.

Recommended through-beam FT fiber

3. Rand / Position and Carrier Tape Mark Detection

Edge positioning for FPC, Leiterplatte, sprocket holes and marking points on component carrier tape

Color mark detection for labels and printed marks (distinguish light difference between base and mark)

Small-spot fiber FU-49, spot size down to 0.1mm

4. Zählen & High-speed Line Sorting

Count workpieces on high-speed conveyor and sort micro components; maximum response 23μs, suitable for production lines with tens of thousands of parts per minute.

5. Detection in Narrow Cavities & Confined Spaces

Flexible fiber can be routed into molds, jigs and narrow grooves; amplifier body is mounted outside for easy adjustment. M3/M4 threaded fiber heads can be directly locked into jigs.

6. Non-contact Liquid Level / Powder Level Detection

Detect liquid or powder presence inside transparent pipes and hoppers using through-beam fiber to measure light transmission change through pipe wall.

7. Automobilteile, Gummi & Low-reflectivity Black Workpiece Detection

For black rubber and matte plastic targets, switch to TERA low-speed high-gain mode to boost light intensity and realize stable detection of low-reflection parts.

⚙️ Cascade Application

Dense multi-point detection: FS-N41N main unit + FS-N42N expansion units cascaded. Only main unit requires power supply. Amplifiers draw power via side bus, reducing 24V wiring and saving DIN rail space inside control cabinet. Anti-interference function must be enabled for closely installed units.

✅ Quick Matching Table

⚠️ Application Limitations

1. Single unit only supports 1-channel NPN output. Select FS-N43N if dual outputs are required.
2. No external input terminal, external trigger setting is not supported.
3. Fiber shall not be sharply bent; minimum bend radius per fiber head datasheet must be followed.
4. Heavy dust/oil environment: Fiber end face accumulates contamination easily and needs periodic cleaning. Light attenuation warning can be activated for predictive maintenance.

📌 Compatible PLC

Sink input of Mitsubishi FX, Siemens S7-200SMART can directly connect the black NPN signal wire of FS-N41N.