KEYENCE FS-N41N Digital Fiber Amplifier

제품 카테고리: FS-N40 Series Digital Fiber Amplifier, Cable Outlet Main Unit, NPN Output

핵심 애플리케이션: Used with various 키엔스 fiber heads (투과형 / 반사적) to detect tiny objects, transparent parts, 라벨, edges and liquid levels. Widely applied in automated production lines, 포장, semiconductor and 3C equipment.

✅ Model Interpretation

FS: Fiber Sensor Series

N40: FS-N40 amplifier platform

1: Main unit (usable standalone, expandable via cascade connection)

N: NPN open-collector output

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

📋 Key Electrical Specifications

🛠️ Features

1. 듀얼 디지털 디스플레이: Real-time indication of received light value + threshold, 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; 최대 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 (공통 모델)

투과형: FT-FM2, FT-FM3, FT-KV840, 등.

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

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

📌 Wiring Definition (4-core cable type)

갈색: DC24V+

파란색: DC0V

검은색: NPN signal output

하얀색: 미사용 (empty)

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

⚠️ 문제 해결

1. 디스플레이 없음: 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. 잘못된 트리거링: 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 / 호환 모델

PNP version in same series: FS-N41P

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

국내 대안: 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

시리즈 개요: 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; 피 = PNP; C = M8 connector with NPN/PNP switchable

표준 케이블 길이: 2중

📌 Cascade Rules

Maximum cascaded quantity: 최대 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.

전원공급장치: 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: Main unit + FS-N42N/P expansion

Require 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 (투과형 / 반사적 / 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 전자, 반도체, 포장 & 인쇄, 리튬 배터리, 음식 & 제약, 자동차 부품, custom automation equipment.

🧩 Typical Detection Applications

1. 있음 / Position Detection (가장 일반적인)

Electronic components: Detect presence/position of resistors, 커패시터, 작은 조각, connector pins and tiny plastic parts

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

재료 이송: 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. 투명한 / Semi-transparent Object Detection (Film, 애완 동물, 유리)

Ordinary photoelectric sensors struggle to distinguish transparent film, 플라스틱 병, 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. 가장자리 / Position and Carrier Tape Mark Detection

Edge positioning for FPC, PCB, 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. 계산 & 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. 자동차 부품, 고무 & 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.