BECKHOFF

BECKHOFF KL3444 Bus Terminal Analog Input Module

SKU KL3444

In stock
  • 12-month warranty
  • Free returns within 30 days
  • Manufacturer: BECKHOFF

  • Product No.: KL3444

  • Country of origin:Germany

  • Product Type: Bus Terminals

  • Payment: T/T, Western Union

  • Weight: 55g

  • Dimensions: 12 mm x 100 mm x 68 mm

  • Shipping port: Xiamen

  • Warranty: 12 months

Description

Engineered for processing standardized analog current signals, the Beckhoff KL3444 Bus Terminal processes signals in the 0 to 20 mA range with high-resolution acquisition. This compact, 12 mm wide module features four single-ended input channels, making it optimal for spaced-constrained control cabinets requiring multi-channel density. The device derives its power directly from the internal K-bus system, enabling seamless communication with the master PLC or industrial PC coupler. Utilizing 12-bit digital resolution, the module ensures accurate transmission of system variables to the controller. A robust design featuring 500 V galvanic isolation between the K-bus and the field signal inputs guarantees system stability and protects sensitive control-side electronics from external electrical disturbances.

Features

  • Four single-ended analog input channels operating in the 0 to 20 mA range.
  • Fast conversion time of approximately 2 ms for real-time monitoring.
  • Galvanic isolation of 500 V between the K-bus and the input signal lines.
  • Compact KL-12-8pin housing with integrated status LEDs for quick diagnostic checks.
  • Tool-free mounting on 35 mm DIN rails via double slot-and-key connection.
  • Spring-clamp termination for quick, vibration-resistant field wiring.

Applications

  • Process manufacturing and chemical plant signal monitoring.
  • Water and wastewater pressure/flow sensor integration.
  • Machine building and factory automation telemetry.
  • HVAC control and environmental monitoring systems.

Ordering Information

Model / Part Number Description
KL3444 Bus Terminal, 4-channel analog input, current, 0 to 20 mA, 12 bit, single-ended
KS3444 Bus Terminal, 4-channel analog input, current, 0 to 20 mA, 12 bit, single-ended, pluggable wiring

Technical Specifications

Parameter Specification
Manufacturer BECKHOFF
Part Number / Model KL3444
Number of Inputs 4
Signal Current 0 to 20 mA
Technology Single-ended
Internal Resistance < 85 Ohm
Conversion Time ~ 2 ms
Resolution 12 bit
Measuring Error < +/-0.3% (relative to full scale value)
Surge Voltage Resistance 30 V DC
Electrical Isolation 500 V (K-bus / signal voltage)
Current Consumption K-bus typ. 85 mA
Bit Width in Process Image Input: 4 x 16 bit data (4 x 8 bit control/status optional)
Weight approx. 55 g
Operating Temperature 0 to +55 degC
Storage Temperature -25 to +85 degC
Relative Humidity 95%, no condensation
Vibration/Shock Resistance Conforms to EN 60068-2-6 / EN 60068-2-27
EMC Immunity/Emission Conforms to EN 61000-6-2 / EN 61000-6-4
Protection Class IP20
Housing Dimensions (W x H x D) 12 mm x 100 mm x 68 mm

Installation Guidelines

  • Mounting: Snap securely onto a standard 35 mm DIN rail (conforming to EN 60715). Ensure the locking mechanism is engaged.
  • Wiring: Use solid (0.08 to 2.5 mm²), flexible (0.08 to 2.5 mm²), or ferruled (0.14 to 1.5 mm²) conductors. Push a suitable screwdriver into the spring release to insert the wire.
  • Shielding: Route signal lines away from high-power distribution lines. Use shielded cables in high-noise environments to ensure signal integrity.
  • Ventilation: Maintain standard operating spacing around the module to prevent thermal buildup, ensuring ambient temperature remains below +55 degC.

Compliance and Certifications

  • CE
  • UL
  • ATEX: II 3 G Ex nA IIC T4 Gc
  • DNV GL

FAQ

What is the signal range of the Beckhoff KL3444 analog input module?

The Beckhoff KL3444 processes standard analog current signals in the range of 0 to 20 mA.

What is the difference between the KL3444 and the KS3444?

The KL3444 has standard terminal connections, while the KS3444 features a pluggable wiring interface for easier module replacement without disconnecting individual wires.

Does the KL3444 require an external power supply?

No, the KL3444 is powered internally via the standard Beckhoff K-bus interface, consuming typically 85 mA.

What is the conversion speed and resolution of the KL3444?

The module features a 12-bit resolution and a fast conversion time of approximately 2 ms.

Is the KL3444 suitable for hazardous environments?

Yes, the KL3444 is certified with ATEX Ex marking II 3 G Ex nA IIC T4 Gc for use in Zone 2 hazardous locations.

View all FAQs →

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Shipping &amp; Returns

Global Express Shipping

  • Standard Delivery: 4–6 business days via DHL, FedEx, and UPS.
  • Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
  • Worldwide Coverage: Serving over 150 countries.

Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our technical warranty.
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Global Express Shipping

  • Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
  • Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
  • Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).


For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

Country of origin
Germany

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