KFD2-SOT3-EX1.LB
KFD2-SOT3-EX1.LB
KFD2-SOT3-EX1.LB
KFD2-SOT3-EX1.LB
KFD2-SOT3-EX1.LB
KFD2-SOT3-EX1.LB
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  • Lifecycle status

    Discontinued / Obsolete by OEM
    Apter Power supplies top-grade Pepperl+Fuchs KFD2-SOT3-EX1.LB replacement hardware, offering industrial facilities a trusted source for critical automation components to maintain continuous and efficient plant operations.

KFD2-SOT3-EX1.LB

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The Pepperl+Fuchs KFD2-SOT3-EX1.LB is a premium 1-channel isolated barrier designed to ensure intrinsic safety and highly reliable digital signal transmission between hazardous and safe areas in industrial automation.
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Technical specifications for KFD2-SOT3-EX1.LB

  • Manufacturer:
    Pepperl + Fuchs
  • Part Number:
    KFD2-SOT3-EX1.LB
  • Product Family:
    Pepperl + Fuchs
  • Product Type:
    Switch Amplifier
  • Stock:
    1
  • Rated Supply Voltage:
    19 to 30 V DC (via terminals or Power Rail)
  • Rated Current Consumption:
    20 to 15 mA
  • Ripple:
    ≤ 10%
  • Rated Current (Ir):
    20...15 mA
  • Power Dissipation:
    ≤ 1 W (includes maximum power dissipation in the output)
  • Switching Frequency:
    ≤ 5 kHz
  • Electrical Response Time:
    ≤ 200 μs
  • Safety Step Function Reaction Time:
    < 20 ms
  • Operating Temperature Range:
    -20°C to +60°C (-4°F to +140°F)
  • Storage Temperature Range:
    -40°C to +85°C
  • Weight:
    0.1 kg
  • Estimated shipping dimensions:
    2x11.3x12cm
  • Tariff Code:
    8536300000
  • Country of origin:
    USA
  • 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.

More Information

Overview Manuals Specifications Applications Operating Environment Performance & Efficiency

Features:

  • Intrinsic Safety Galvanic Isolation
  • Advanced Line Fault Detection (LFD)
  • Flexible Dual-Output Configuration
The Pepperl+Fuchs KFD2-SOT3-EX1.LB provides robust galvanic isolation between hazardous field devices and safe control systems, effectively preventing dangerous energy transfers and ground loops. It guarantees uncompromising safety compliance while ensuring pristine, noise-free digital signal transmission across demanding industrial boundaries.

Equipped with real-time diagnostic capabilities, the Pepperl+Fuchs KFD2-SOT3-EX1.LB constantly monitors field wiring for lead breakages and short circuits. Any anomaly is instantly communicated via distinct front-panel LED indicators and a collective error message rail, drastically reducing troubleshooting downtime.

Featuring versatile internal architecture, the Pepperl+Fuchs KFD2-SOT3-EX1.LB allows engineers to configure its dual passive transistor outputs independently via front DIP switches. Output II can be seamlessly assigned either to replicate output I or to function as a dedicated line fault indicator.

The KFD2-SOT3-EX1.LB Pepperl+Fuchs Switch Amplifier may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Pepperl+Fuchs KFD2-SOT3-EX1.LB Switch Amplifier Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Pepperl+Fuchs KFD2-SOT3-EX1.LB Switch Amplifier

General

  • Manufacturer Pepperl+Fuchs
  • Model KFD2-SOT3-EX1.LB
  • Condition New Original ready stock
  • Product Family KFD2-STC4-EX1.H,KHD2-SR-Ex2.P,KFD2-STC3-Ex1
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Petrochemical Refineries & Offshore Platforms: Extensively utilized in hazardous oil and gas production sites to safely link NAMUR proximity sensors monitoring valve positions and mechanical limits in Zone 0/1 to safe-area control systems.
  • Chemical Processing & Pharmaceutical Plants: Deployed in reactor batch control loops where reliable intrinsic safety isolation is mandatory to prevent ignition risks in explosive gas or dust atmospheres.
  • Power Generation & Utility Boilers: Applied in critical turbine monitoring and burner management systems requiring high-integrity digital signal transmission with strict hardware fault tolerance.
  • Factory Automation & Material Handling: Integrated into high-speed production lines utilizing inductive sensors and dry-fault contacts where line break monitoring and rapid response times (≤ 200µs) are crucial.
  • Hazardous Area Compatibility: Certified for mounting in safe areas or Class I/II, Division 2 / Zone 2 locations, with dedicated intrinsically safe field-circuit connections extending directly into Zone 0, 1, or 2.
  • Thermal Endurance: Engineered to perform reliably across a broad industrial temperature spectrum from -20℃ up to +60℃ without performance degradation.
  • Enclosure & Mechanical Rigidity: Housed in a compact, space-saving 20 mm wide IP20 flame-retardant plastic enclosure optimized for standard 35 mm DIN rail installation.
  • Electromagnetic Resilience: Built to withstand harsh industrial electromagnetic disturbances, fully conforming to EN 61326-1 and NAMUR NE 21 standards for electromagnetic compatibility.
  • High-Speed Signal Processing: Delivers exceptional switching frequencies up to 5 kHz with minimal propagation delay and a signal response time under 200μs.
  • Optimized Power Efficiency: Consumes exceptionally low operational current (15 to 20 mA) with total internal power dissipation kept strictly under 1 W, minimizing cabinet heat accumulation.
  • Enhanced Safety Integrity: Backed by a verified SIL 2 safety rating, ensuring low probability of dangerous failures on demand (PFDavg) and high safe failure fraction (SFF) for mission-critical loops.
  • Streamlined Power Distribution: Leverages optional Power Rail technology to distribute 24 V DC supply power and collective error messages across multiple modules, eliminating redundant jumper wiring and saving valuable installation time.
Description
The Pepperl+Fuchs KFD2-SOT3-EX1.LB isolated barrier acts as a vital bridge in hazardous industrial environments, safely transmitting digital signals from NAMUR sensors or mechanical dry contacts located in Zone 0, 1, or 2 into the safe control room area. Engineered with precision galvanic isolation, it completely protects control systems from high-voltage transients while maintaining exceptional signal integrity and low power dissipation under rigorous operating conditions.  

Equipped with dual passive transistor outputs and flexible configuration options via front-access DIP switches, the Pepperl+Fuchs KFD2-SOT3-EX1.LB allows engineers to seamlessly tailor operating modes and define output II functions either as a mirrored signal or a dedicated fault indication output. Its sophisticated integrated monitoring architecture ensures continuous oversight of field-side wiring, immediately flagging anomalies through standardized NAMUR NE44 compliant LED indicators and a collective error message output.  

Compliance with international safety standards including SIL 2 (SC 3) per IEC/EN 61508, along with robust ATEX and IECEx certifications, makes the Pepperl+Fuchs KFD2-SOT3-EX1.LB an ideal choice for high-stakes applications in oil and gas refineries, chemical processing plants, and pharmaceutical facilities. Furthermore, its seamless support for Power Rail technology significantly streamlines cabinet wiring layout, reducing installation time and physical footprint while maximizing system uptime and operational safety.
Alternative Names
KFD2SOT3EX1.LB KFD2-SOT3-Ex1.LB KFD2-S0T3-EX1.LB KFD2-SOT3-EX1.L8 KFD2-SOT3-EXI.LB KFD2-STC3-Ex1 KHD2-SR-Ex2.P KFD2-STC4-EX1.H
Technical notes
The Pepperl+Fuchs KFD2-SOT3-EX1.LB features user-configurable front DIP switches that allow quick inversion of the operation mode and flexible assignment of output II for either signal duplication or line fault reporting. It ensures comprehensive field-side circuit oversight, automatically signaling line breakages and short-circuit faults via front LEDs and a system-level collective error bus.
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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 does the firmware and hardware switch configuration affect the integration of the Pepperl+Fuchs KFD2-SOT3-EX1.LB into existing control loops?
The Pepperl+Fuchs KFD2-SOT3-EX1.LB relies entirely on hardwired front-access DIP switches (S1, S2, S3) rather than complex firmware, ensuring zero software compatibility hurdles, rapid deployment, and straightforward deterministic parameter setting for control engineers.
What protocols and output interfaces are supported by the Pepperl+Fuchs KFD2-SOT3-EX1.LB for third-party PLC integration?
The Pepperl+Fuchs KFD2-SOT3-EX1.LB interfaces with standard controllers via discrete, non-polarized passive transistor outputs (max. 30 V DC, 100 mA) that easily connect to standard digital input cards, alongside a collective error bus via Power Rail for system-level diagnostics.
What are the primary environmental and physical installation restrictions for deploying the Pepperl+Fuchs KFD2-SOT3-EX1.LB?
The Pepperl+Fuchs KFD2-SOT3-EX1.LB must be installed in a safe area or suitable enclosure (Zone 2 / Div 2) on a standard 35 mm DIN mounting rail, maintaining an operating ambient temperature range between -20°C and +60°C with an IP20 protection rating.
What safety standards and functional integrity levels are certified for the Pepperl+Fuchs KFD2-SOT3-EX1.LB?
The Pepperl+Fuchs KFD2-SOT3-EX1.LB is certified up to SIL 2 (Systematic Capability SC 3) in accordance with IEC/EN 61508, featuring rigorous ATEX and IECEx hazardous area approvals for direct connection to Zone 0/1/2 field devices.
What is the recommended proof test interval and procedure to maintain safety compliance for the Pepperl+Fuchs KFD2-SOT3-EX1.LB?
To preserve the functional safety rating of the Pepperl+Fuchs KFD2-SOT3-EX1.LB, periodic proof tests involving simulated sensor thresholds (4.7kΩ, 220Ω, and 150kΩ resistors) should be conducted every 1 to 5 years depending on the calculated PFDavg budget.