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Keyence FS-N42N NPN Expansion Fiber Optic Amplifier Unit

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Keyence FS-N42N

by Keyence

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OverviewElevate the capabilities of your industrial automation systems with the Keyence FS-N42N, an advanced NPN output expansion amplifier unit. This device is meticulously engineered for seamless integration within Keyence FS-N Series fiber optic sensor systems. As a cable-type model, it ensures optimal efficiency and straightforward connection to a primary amplifier unit, such as the FS-N11N. Its core function is to significantly broaden the number of sensing points in your configuration while maintaining a remarkably compact footprint, thanks to its efficient DIN rail mounting design. The FS-N42N exemplifies Keyence's dedication to superior performance, featuring an ultra-fast response time of just 50 µs, which simplifies configuration and enables robust multi-unit connectivity. This makes it an essential component for demanding applications requiring dense sensor arrangements and unwavering signal detection in high-speed industrial settings.Key Features NPN Output Compatibility: Specifically designed for perfect integration with NPN logic control systems, ensuring smooth operation and communication. Integrated Cable Connection: Features a built-in 2-meter cable for direct, uncomplicated wiring, reducing installation time and effort. System Expansion Unit: Extends the capacities of your current system; requires a main amplifier (e.g., FS-N11N) for full functionality. Rapid Response Time: Achieves an exceptional response speed of up to 50 µs, vital for precise and dependable detection in fast-paced production lines and critical processes. Space-Efficient DIN Rail Mounting: With only a 9 mm width, this unit supports high-density installations on DIN rails, optimizing panel space and organization. Simplified Setup & Display: Streamlines calibration with intuitive controls and a clear digital LED display for quick, accurate configuration. Automatic Interference Prevention: Incorporates advanced technology to prevent mutual interference, allowing close-proximity sensor placement without performance degradation. Technical Specifications Model: FS-N42N Type: Expansion amplifier (NPN, cable style) Output: NPN open-collector Response Speed: 50 µs (Ultra-fast mode) Connection Method: 2-meter cable Power Source: Supplied directly from the main amplifier unit Display: Digital LED display for operational status and settings Mounting: Standard DIN rail Protection Rating: IP40 (amplifier), IP67 (compatible sensor head) Dimensions: 9 mm (W) × 69.5 mm (H) × 52.5 mm (D) Compatible Sensor Heads: FU Series Applications Multi-Point Monitoring: Strategically enhance sensing capacity within confined control panels, enabling comprehensive observation in limited spaces. High-Speed Production Lines: Ensure accurate and reliable detection of rapidly moving parts, crucial for maintaining efficiency and quality in fast-paced manufacturing. Electronics Assembly: Perfect for dense installation in the constrained environments typical of electronics production, where precision and space-saving are essential. Packaging Machinery: Facilitate synchronized detection across multi-sensor systems, ensuring smooth and precise operation in intricate packaging processes. Why Choose This Model?The Keyence FS-N42N represents an outstanding choice for engineers and automation specialists aiming to augment their sensing capabilities. It provides a highly economical expansion solution specifically tailored for NPN control systems, allowing for operational scaling without significant financial outlay. This model offers a compact, high-speed solution perfectly suited for intricate multi-sensor configurations, delivering unparalleled performance in challenging industrial conditions. With its exceptionally reliable operation and user-friendly interface, the FS-N42N minimizes setup time and maximizes operational efficiency, making it a strategic investment for optimizing industrial processes.Order NowReady to upgrade your automation system? Contact Palm Parts Solution today to acquire the Keyence FS-N42N and experience enhanced precision and efficiency in your operations.FAQWhat is the primary function of the Keyence FS-N42N?The Keyence FS-N42N is an NPN expansion fiber amplifier designed to extend the number of sensing points in your existing Keyence FS-N Series fiber optic sensor system, integrating seamlessly with a main amplifier unit.Is this unit compatible with all fiber optic sensor systems?No, the FS-N42N is specifically designed for seamless integration with Keyence FS-N Series fiber optic sensor systems and works in conjunction with a main amplifier unit like the FS-N11N.What is the response time of the Keyence FS-N42N?The unit boasts an ultra-fast response time of 50 µs, making it suitable for high-speed industrial applications requiring precise and reliable detection.How compact is the FS-N42N?It features a slim 9 mm width and is designed for DIN rail mounting, allowing for high-density installations and optimal use of panel space.Does the FS-N42N require a separate power supply?No, the power for the FS-N42N is supplied directly from the main amplifier unit to which it is connected.

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PRODUCT DETAILS

Keyence FS-N42N

Overview

This is a genuine Keyence component from the Sensors family. PalmPartsSolution stocks it in new, refurbished, and surplus condition with tested warranty and same-day shipping on in-stock units.

Whether you are sourcing a like-for-like replacement for an existing installation, an emergency spare to keep a line running, or a qualified part for a new build, our team can confirm availability, revision, and lead time before you order.

Key Features

  • Genuine Keyence catalog part
  • Tested before shipment
  • Backed by PalmPartsSolution warranty
  • Cross-reference and revision assistance available
  • Compatible with the broader Keyence automation ecosystem
  • Engineered to integrate inside Sensors installations

Compatibility

When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Keyence equipment. Where applicable, confirm:

  • Input/output voltage and current rating
  • Communication protocol and network role
  • Mounting form factor and footprint
  • Operating temperature, humidity, and IP rating
  • Required certifications (UL, CE, ATEX, marine, etc.)

Not sure which revision you need? Send us the catalog number on the nameplate and we will confirm the correct match.

Replacement Information

Three ways to source this part through PalmPartsSolution:

  1. Exact replacement — same Keyence catalog number, new or refurbished, tested and warrantied
  2. Form-fit-function equivalent — alternate revision or build that drops in without code changes
  3. Engineered migration — current-generation Keyence platform with documented conversion notes for the Sensors family

Contact our engineering team if you need help choosing between these tracks.

Technical Specifications

  • Model: FS-N42N
  • Type: Expansion amplifier (NPN, cable style)
  • Output: NPN open-collector
  • Response Speed: 50 µs (Ultra-fast mode)
  • Connection Method: 2-meter cable
  • Power Source: Supplied directly from the main amplifier unit
  • Display: Digital LED display for operational status and settings
  • Mounting: Standard DIN rail
  • Protection Rating: IP40 (amplifier), IP67 (compatible sensor head)
  • Dimensions: 9 mm (W) × 69.5 mm (H) × 52.5 mm (D)
  • Compatible Sensor Heads: FU Series

Applications

  • Multi-Point Monitoring: Strategically enhance sensing capacity within confined control panels, enabling comprehensive observation in limited spaces.
  • High-Speed Production Lines: Ensure accurate and reliable detection of rapidly moving parts, crucial for maintaining efficiency and quality in fast-paced manufacturing.
  • Electronics Assembly: Perfect for dense installation in the constrained environments typical of electronics production, where precision and space-saving are essential.
  • Packaging Machinery: Facilitate synchronized detection across multi-sensor systems, ensuring smooth and precise operation in intricate packaging processes.

Why Choose the FS-N42N?

The Keyence FS-N42N represents an outstanding choice for engineers and automation specialists aiming to augment their sensing capabilities. It provides a highly economical expansion solution specifically tailored for NPN control systems, allowing for operational scaling without significant financial outlay. This model offers a compact, high-speed solution perfectly suited for intricate multi-sensor configurations, delivering unparalleled performance in challenging industrial conditions. With its exceptionally reliable operation and user-friendly interface, the FS-N42N minimizes setup time and maximizes operational efficiency, making it a strategic investment for optimizing industrial processes.

Availability & Shipping

  • In stock: FS-N42N ready for immediate dispatch from our Florida warehouse.
  • Free USA shipping: FedEx Priority (2–5 business days) and UPS Ground (3–5 business days). Expedited options available at checkout.
  • Worldwide delivery: FedEx International Priority (1–5 days), UPS International Priority (3–5 days), and USPS International (5–10 days) — rates calculated at checkout.
  • Bulk pricing: Volume discounts on request — contact our sales team for quantity quotes.
  • Buy with confidence: Every FS-N42N ships with a 1-Year PALM Parts warranty and a 30-day return window.
SUPPORT

Frequently Asked Questions — Keyence

The Keyence FS-N42N is an NPN expansion fiber amplifier designed to extend the number of sensing points in your existing Keyence FS-N Series fiber optic sensor system, integrating seamlessly with a main amplifier unit.

Machine down? We ship parts the same day.

New, surplus, and refurbished Keyence inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.

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PALM Parts Solution operates as an independent industrial automation supplier and is not an authorized distributor or affiliate of any listed manufacturer or brand name. Manufacturer trademarks and product names are used solely for identification purposes. Original manufacturer warranties do not apply. All products sold by PALM Parts are backed by our own 1-year warranty.

Product Condition & Firmware

All products are sold as new unless stated otherwise. Original manufacturer packaging may show signs of handling, storage, or shelf wear. Date codes and series may vary from current factory production. PALM Parts does not guarantee the presence, version, or compatibility of any firmware on PLC or automation products.

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