Description
The KEYENCE FS-N41N is a high-performance Fiber Optic Amplifier Unit (Main Unit, Cable Type) from the FS-N Series, designed for precise object detection using KEYENCE reflective or thru-beam fiber optic cables. It features a bright dual-digit 7-segment display, easy “TEACH” push-button calibration, and high-speed response (response time down to 0.5ms), making it ideal for detecting small parts, transparent objects, or targets with varying surface reflectivity on automated production lines. The “N” suffix indicates NPN open-collector transistor output. It supports cascade connection of expansion units (FS-N4□) and offers mutual interference prevention in multi-sensor setups.
Key Features
- Sensor Type: Fiber optic amplifier (main unit, cable-connector type fiber head)
- Output Type: NPN Open Collector (Sink) — Max 100mA
- Display: 2-digit 7-segment LED (Incident Light / Threshold values)
- Calibration: One-touch TEACH (SET / LOCK / AUTO-zero)
- Response Time: Selectable — HIGH SPEED: 0.5ms / STANDARD: 1ms / LONG: 5ms / SUPER LONG: 20ms
- Mutual Interference Prevention: Up to 4 units (staggered timing)
- Power Supply: 12–24 V DC ±10%
- Mounting: DIN rail (35mm) or direct panel mount (with optional holder)
- Country of Origin: Japan
Technical Specifications (FS-N41N)
Parameter | Specification |
|---|---|
Model | FS-N41N (KEYENCE FS-N Series) |
Function | Fiber Optic Amplifier — Main Unit (Cable Type Fiber Head Connection) |
Output Type | NPN Open Collector (Sink) — 100 mA max @ 30V DC |
Control Outputs | 1 × NPN (OUT) + 1 × NPN (Self-diagnostic / Stability — on select models) |
Input (Teaching) | Pushbutton on front face (SET / MODE / UP / DOWN) |
Power Supply | 12–24 V DC ±10%, ripple ≤ 10% p-p |
Current Consumption | ≤ 60 mA (excluding load) |
Response Time | 0.5 ms (HIGH SPEED) / 1 ms (STD) / 5 ms / 20 ms selectable |
Light Source Compatibility | FS Series fiber units (reflective/thru-beam fibers with FS-N cable connector) |
Hysteresis | Adjustable (Fixed 5% in normal mode; variable in advanced modes) |
Protection Circuits | Reverse polarity protection (power & output), surge suppressor |
Indicators | PWR (Green LED), OUT (Red LED — lights on detection), Stability / Margin LEDs |
Expansion Capability | Up to 16 expansion amplifiers (FS-N40 series) cascaded |
Dimensions (W×H×D) | 35 mm × 73 mm × 60 mm (approx., excl. protrusions) |
Weight | Approx. 90 g |
Standards | CE, UL (listed component), RoHS compliant |
💡 Model Note:
Warranty & After-Sales
- Factory new units: 12 months warranty
- Refurbished units: 3-6 months warranty
- Technical support for:
- Fiber head selection (reflective vs thru-beam, spot size, sensing distance)
- TEACH / threshold tuning for glossy / dark / transparent objects
- NPN vs PNP wiring (N: Brown=+V, Blue=0V, Black=Output sinking to 0V)
- Mutual interference prevention setup in multi-sensor arrays
- Cross-reference assistance vs. OMRON E3X, SUNX FX-A3 series if required
Delivery Time
- Standard delivery: 3-5 working days (stock items)
- Express shipping available upon request
Why Choose Our Store
- Genuine KEYENCE automation components — not aftermarket clones
- Global supply network with competitive pricing
- Expertise in KEYENCE FS / FU / GX / LV / SR series sensors & amplifiers
- Comprehensive technical documentation (fiber selection charts, wiring diagrams, teach-in guides)
- Responsive customer service and support
Applications
- Small part detection on high-speed assembly lines
- Transparent film / bottle detection (with proper fiber & teach setting)
- Lead frame / PCB component presence check
- Conveyor product counting & jam detection
- Retrofit of older KEYENCE / competitor fiber amp in compact DIN housing
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