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KL3404

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The Beckhoff KL3404 Bus Terminal is a high-precision 4-channel analog input module designed for seamless integration into Beckhoff automation systems.
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Technical specifications for KL3404

  • Manufacturer:
    BECKHOFF
  • Part Number:
    KL3404
  • Product Family:
    BECKHOFF
  • Number of inputs:
    4
  • Power supply:
    via the K-bus
  • Signal voltage:
    -10…+10 V
  • Technology:
    single-ended
  • Internal resistance:
    > 130 kΩ
  • Conversion time:
    ~ 2 ms
  • Resolution:
    12 bit (for 0…10 V range: resolution 11 bit)
  • Measurement error/uncertainty:
    < ±0.3% (relative to full scale value)
  • Electrical isolation:
    500 V (K-bus/signal voltage)
  • Current consumption K-bus:
    typ. 100 mA
  • Bit width in the process image:
    input: 4 x 16 bit data (4 x 8 bit control/status optional)
  • Configuration:
    no address or configuration setting
  • Operating temperature:
    -25…+60°C
  • Storage temperature:
    -40…+85°C
  • Relative humidity:
    95%, no condensation
  • Protect. rating/installation pos.:
    IP20/variable
  • Approvals/markings:
    CE, CCC, UL, ATEX, IECEx, DNV
  • Plug-in wiring level:
    for all KSxxxx Bus Terminals
  • Weight:
    0.075 kg
  • Estimated shipping dimensions:
    12x10x6.8cm
  • Tariff Code:
    8537101190
  • Country of origin:
    Germany
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.
Description
The Beckhoff KL3404 Bus Terminal is engineered for reliable acquisition of analog voltage signals in industrial automation applications. It supports four single-ended inputs with a signal range of −10 V to +10 V, digitized to 12‑bit resolution (11-bit for the 0–10 V range), ensuring precise and accurate measurements. The module is powered via the K-bus and provides electrical isolation of 500 V between the bus and signal circuits, protecting both the module and connected devices.

Designed for robust operation, the KL3404 can function within a temperature range of −25 °C to +60 °C and be safely stored between −40 °C and +85 °C. The module withstands relative humidity up to 95% (non-condensing) and meets industrial standards for vibration and shock according to EN 60068-2-6 and EN 60068-2-27. EMC immunity and emission compliance are ensured according to EN 61000-6-2 and EN 61000-6-4.

The module features a plug-in wiring interface compatible with all KSxxxx Bus Terminals, simplifying installation and integration. LEDs indicate active data exchange with the Bus Coupler, providing immediate visual confirmation of operational status. No address or configuration setting is required, making the KL3404 highly user-friendly for a variety of Beckhoff control applications.

Optimized for high-performance industrial automation, the KL3404 Bus Terminal combines precision measurement, electrical safety, and straightforward integration, making it an essential component for analog signal processing in Beckhoff systems.
Alternative Names
KL340O KL-3404 KL 3404 KL03404 KL34004 KL3440 KL340 KL3-404
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
How fast can it be shipped?
Most orders ship within 1–3 business days if the item is in stock.
How many inputs does the KL3404 have?
Four single-ended analog inputs.
What is the voltage signal range?
−10 V to +10 V.
Can I get more photos of the product?
Yes, additional photos can be provided upon request.
What is the resolution of the module?
12-bit (11-bit for the 0–10 V range).
How is the module powered?
Via the Beckhoff K-bus.
What is the electrical isolation rating?
500 V between K-bus and signal voltage.
Does it support plug-in wiring?
Yes, compatible with all KSxxxx Bus Terminals.

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