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Beckhoff KL1904 4-Channel Digital Input Terminal for K-Bus I/O systems

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Beckhoff KL1904

by Beckhoff

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OverviewThe Beckhoff KL1904 represents a high-performance 4-channel digital input terminal, specifically engineered for demanding industrial environments. This unit seamlessly integrates into the K-Bus I/O system, efficiently processing 24 V DC binary signals and relaying them to your primary control system. Its compact 12 mm footprint and built-in electrical isolation between inputs and the K-Bus ensure secure and reliable data acquisition, making it an essential element for a broad spectrum of automated machinery and building management systems. The KL1904 exemplifies Beckhoff's dedication to providing superior, dependable, and easily deployable automation solutions.Key Features Four Digital Input Channels: Offers extensive capacity for multiple signal sources, increasing system adaptability. 24 V DC Input Compatibility: Standardized voltage for straightforward integration into existing industrial setups. Space-Saving K-Bus Housing: Optimizes control cabinet space, perfect for high-density installations. Internal Electrical Isolation: Provides robust defense against electrical interference, ensuring data accuracy and operational safety. Channel Diagnostic Indicators: Delivers instant status updates, streamlining troubleshooting and maintenance. TwinCAT Software Integration: Enables quick configuration and commissioning within Beckhoff's powerful engineering platform. Consistent Signal Capture: Ensures precise and reliable data for critical automation processes. Technical Specifications Part Number: KL1904 Manufacturer: Beckhoff Function: Digital input terminal Channels: 4 inputs Input Voltage: 24 V DC Width: 12 mm Electrical Isolation: Yes (I/O to bus) Mounting: DIN rail (K-Bus Terminal system) Operating Temperature: –25 °C to +60 °C ApplicationsThis terminal is exceptionally versatile for a variety of industrial and building automation tasks: Digital Signal Acquisition: Ideal for gathering data from various switches, pushbuttons, and industrial sensors in factory and process automation. Machine and Equipment Control: Provides vital input capabilities for manufacturing machinery, packaging lines, and material handling systems. Building and Energy Management: Perfect for monitoring status signals from HVAC units, lighting controls, security systems, and power management solutions. Distributed I/O Systems: Extends automation capabilities across widespread control points, enhancing system architecture flexibility. Modular Control Architectures: Facilitates the development of scalable and adaptable control systems through seamless integration with other K-Bus components. Why Choose This Model?The Beckhoff KL1904 stands out as an excellent option for your digital input requirements, thanks to its unwavering reliability and intelligent engineering. Its 4-channel capability within a remarkably compact design conserves vital cabinet space without compromising performance. The crucial electrical isolation feature shields your control system from unexpected disturbances, ensuring continuous and safe operation. With intuitive diagnostic LEDs, monitoring system status and pinpointing potential issues becomes exceptionally simple, significantly reducing downtime. Moreover, as a Beckhoff product, the KL1904 benefits from a heritage of innovation and quality, guaranteeing full compatibility and effortless integration with the powerful TwinCAT software environment. This terminal is more than just a component; it's an investment in robust, efficient, and future-proof automation.Order NowUpgrade your automation infrastructure with the Beckhoff KL1904 4-channel 24 V DC digital input terminal. This essential module is readily available for worldwide shipping, prepared to integrate into your most demanding applications. Enhance your control systems with Beckhoff's renowned quality and performance. Don't miss the opportunity to optimize your operations – secure your KL1904 today!FAQWhat types of signals can the Beckhoff KL1904 process?The KL1904 is designed to efficiently process 24 V DC binary input signals from various industrial devices.Is the KL1904 compatible with existing K-Bus I/O systems?Yes, the KL1904 is specifically designed for seamless integration within the Beckhoff K-Bus I/O system.How does the compact size of the KL1904 benefit industrial applications?Its compact 12 mm housing maximizes panel space utilization, which is ideal for densely packed control cabinets.What is the purpose of electrical isolation in the KL1904?Electrical isolation ensures robust protection against electrical interference, guaranteeing signal integrity and operational safety for your system.Does the KL1904 offer easy troubleshooting methods?Yes, diagnostic LEDs for each channel provide at-a-glance status indication, simplifying troubleshooting and maintenance.

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PRODUCT DETAILS

Beckhoff KL1904

Overview

This is a genuine Beckhoff component from the Bus Terminals (KL) 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 Beckhoff catalog part
  • Tested before shipment
  • Backed by PalmPartsSolution warranty
  • Cross-reference and revision assistance available
  • Compatible with the broader Beckhoff automation ecosystem
  • Engineered to integrate inside Bus Terminals (KL) installations

Compatibility

When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Beckhoff 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 Beckhoff 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 Beckhoff platform with documented conversion notes for the Bus Terminals (KL) family

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

Technical Specifications

  • Part Number: KL1904
  • Manufacturer: Beckhoff
  • Function: Digital input terminal
  • Channels: 4 inputs
  • Input Voltage: 24 V DC
  • Width: 12 mm
  • Electrical Isolation: Yes (I/O to bus)
  • Mounting: DIN rail (K-Bus Terminal system)
  • Operating Temperature: –25 °C to +60 °C

Applications

This terminal is exceptionally versatile for a variety of industrial and building automation tasks:

  • Digital Signal Acquisition: Ideal for gathering data from various switches, pushbuttons, and industrial sensors in factory and process automation.
  • Machine and Equipment Control: Provides vital input capabilities for manufacturing machinery, packaging lines, and material handling systems.
  • Building and Energy Management: Perfect for monitoring status signals from HVAC units, lighting controls, security systems, and power management solutions.
  • Distributed I/O Systems: Extends automation capabilities across widespread control points, enhancing system architecture flexibility.
  • Modular Control Architectures: Facilitates the development of scalable and adaptable control systems through seamless integration with other K-Bus components.

Why Choose the KL1904?

The Beckhoff KL1904 stands out as an excellent option for your digital input requirements, thanks to its unwavering reliability and intelligent engineering. Its 4-channel capability within a remarkably compact design conserves vital cabinet space without compromising performance. The crucial electrical isolation feature shields your control system from unexpected disturbances, ensuring continuous and safe operation. With intuitive diagnostic LEDs, monitoring system status and pinpointing potential issues becomes exceptionally simple, significantly reducing downtime. Moreover, as a Beckhoff product, the KL1904 benefits from a heritage of innovation and quality, guaranteeing full compatibility and effortless integration with the powerful TwinCAT software environment. This terminal is more than just a component; it's an investment in robust, efficient, and future-proof automation.

Availability & Shipping

  • In stock: KL1904 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 KL1904 ships with a 1-Year PALM Parts warranty and a 30-day return window.
SUPPORT

Frequently Asked Questions — Beckhoff

The KL1904 is designed to efficiently process 24 V DC binary input signals from various industrial devices.

Machine down? We ship parts the same day.

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

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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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