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Pepperl+Fuchs KFD2-STC4-Ex2
by Pepperl+Fuchs
Read verified buyer reviews ↓OverviewThe Pepperl+Fuchs KFD2-STC4-Ex2 is a sophisticated 2-channel isolated barrier, meticulously crafted to deliver a stable and secure power supply for 2-wire SMART transmitters operating in challenging and hazardous industrial settings. Engineered for superior performance in intrinsically safe applications, this device efficiently transfers analog input signals from hazardous regions to safe zones, converting them into precise, isolated current values. Its advanced bidirectional communication capabilities seamlessly integrate with popular protocols like HART, BRAIN, and Foxboro, ensuring comprehensive system connectivity and data exchange. Furthermore, the KFD2-STC4-Ex2 is SIL 2 certified according to IEC/EN 61508, highlighting its exceptional dependability and making it an excellent option for critical safety instrumented systems where accuracy and reliability are essential.Key Features Signal Processing: Analog input, optimized for industrial control systems. Transmitter Compatibility: Specifically designed for 2-wire SMART transmitters. Output Detail: High-accuracy 0/4–20 mA current output for flexible integration. Power Input: Versatile 20–35 V DC power input via Power Rail or terminals. Load Capacity: Supports a load resistance range of 0–550 Ω at 20 mA. Diagnostic Access: Integrated test points with sockets, enabling easy connection for HART communicators. Safety Standard: SIL 2 certified (IEC/EN 61508) for critical safety applications. Mounting Method: Designed for convenient 35 mm DIN rail mounting (EN 60715). Dimensions (W×H×D): Compact 20 × 124 × 115 mm housing for space optimization. Environmental Protection: IP20 rated, offering protection against solid objects. Product Identifier: Part Number: 283699, for simplified identification and ordering. Technical Specifications Input Signal Type: Precise 0/4–20 mA input. Supply Voltage: ≥16 V at 20 mA, crucial for stable operation. Output Signal Type: Accurate 0/4–20 mA (with overload protection >25 mA). Signal Purity: Minimal ripple of max. 50 µA rms, ensuring clean signal transmission. Transfer Precision: Exceptional accuracy with ≤10 µA deviation at 20 °C. Temperature Stability: Low temperature influence of ≤0.25 µA/K, maintaining performance in varying conditions. Frequency Response: Field side to control side: 0–7.5 kHz (-3 dB) Safe area to hazardous area: 0.3–7.5 kHz (-3 dB) Response Time: Fast settling time of 200 µs for rapid response. Signal Dynamics: Swift rise/fall time of 20 µs for dynamic signal changes. Electrical Isolation: Output/Power Supply: Functional insulation, 50 V AC Output/Output: Functional insulation, 50 V AC Operating Temperature Range: Robust operational range from -20 °C to +60 °C. Mass: Lightweight design at approximately 150 g. Accreditations and Certifications: ATEX: II (1)G [Ex ia Ga] IIC, II (1)D [Ex ia Da] IIIC, I (M1) [Ex ia Ma] I IECEx: [Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I UL: cULus Listed CE: EN 61326-1:2013 (industrial locations) UKCA: Certified ApplicationsThe Pepperl+Fuchs KFD2-STC4-Ex2 provides a versatile methodology, perfectly suited for a wide range of industrial applications demanding reliable power and signal conditioning for SMART transmitters within hazardous operational zones. Its robust construction and extensive certifications make it an essential component in: Process Automation Systems: Enhancing command and safety in intricate industrial processes. Chemical and Petrochemical Industries: Ensuring secure operation within volatile environments. Oil and Gas Facilities: Guaranteeing dependable data acquisition and control in challenging conditions. Pharmaceutical Manufacturing: Fulfilling strict safety and accuracy requirements for critical processes. Water and Wastewater Treatment Plants: Facilitating reliable monitoring and control in demanding utility operations. Why ChooseChoosing the Pepperl+Fuchs KFD2-STC4-Ex2 signifies an investment in unparalleled reliability, safety, and performance for your critical applications.Order NowExperience the superior quality and robust performance of the Pepperl+Fuchs KFD2-STC4-Ex2. Enhance your system
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Pepperl+Fuchs KFD2-STC4-Ex2
Overview
This is a genuine Pepperl+Fuchs component from the Isolators & Barriers 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 Pepperl+Fuchs catalog part
- Tested before shipment
- Backed by PalmPartsSolution warranty
- Cross-reference and revision assistance available
- Compatible with the broader Pepperl+Fuchs automation ecosystem
- Engineered to integrate inside Isolators & Barriers installations
Compatibility
When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Pepperl+Fuchs 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:
- Exact replacement — same Pepperl+Fuchs catalog number, new or refurbished, tested and warrantied
- Form-fit-function equivalent — alternate revision or build that drops in without code changes
- Engineered migration — current-generation Pepperl+Fuchs platform with documented conversion notes for the Isolators & Barriers family
Contact our engineering team if you need help choosing between these tracks.
Technical Specifications
- Input Signal Type: Precise 0/4–20 mA input.
- Supply Voltage: ≥16 V at 20 mA, crucial for stable operation.
- Output Signal Type: Accurate 0/4–20 mA (with overload protection >25 mA).
- Signal Purity: Minimal ripple of max. 50 µA rms, ensuring clean signal transmission.
- Transfer Precision: Exceptional accuracy with ≤10 µA deviation at 20 °C.
- Temperature Stability: Low temperature influence of ≤0.25 µA/K, maintaining performance in varying conditions.
-
Frequency Response:
- Field side to control side: 0–7.5 kHz (-3 dB)
- Safe area to hazardous area: 0.3–7.5 kHz (-3 dB)
- Response Time: Fast settling time of 200 µs for rapid response.
- Signal Dynamics: Swift rise/fall time of 20 µs for dynamic signal changes.
-
Electrical Isolation:
- Output/Power Supply: Functional insulation, 50 V AC
- Output/Output: Functional insulation, 50 V AC
- Operating Temperature Range: Robust operational range from -20 °C to +60 °C.
- Mass: Lightweight design at approximately 150 g.
-
Accreditations and Certifications:
- ATEX: II (1)G [Ex ia Ga] IIC, II (1)D [Ex ia Da] IIIC, I (M1) [Ex ia Ma] I
- IECEx: [Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I
- UL: cULus Listed
- CE: EN 61326-1:2013 (industrial locations)
- UKCA: Certified
Applications
The Pepperl+Fuchs KFD2-STC4-Ex2 provides a versatile methodology, perfectly suited for a wide range of industrial applications demanding reliable power and signal conditioning for SMART transmitters within hazardous operational zones. Its robust construction and extensive certifications make it an essential component in:
- Process Automation Systems: Enhancing command and safety in intricate industrial processes.
- Chemical and Petrochemical Industries: Ensuring secure operation within volatile environments.
- Oil and Gas Facilities: Guaranteeing dependable data acquisition and control in challenging conditions.
- Pharmaceutical Manufacturing: Fulfilling strict safety and accuracy requirements for critical processes.
- Water and Wastewater Treatment Plants: Facilitating reliable monitoring and control in demanding utility operations.
Why Choose the KFD2-STC4-Ex2?
Choosing the Pepperl+Fuchs KFD2-STC4-Ex2 signifies an investment in unparalleled reliability, safety, and performance for your critical applications.
Availability & Shipping
- ▸In stock: KFD2-STC4-Ex2 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 KFD2-STC4-Ex2 ships with a 1-Year PALM Parts warranty and a 30-day return window.
Frequently Asked Questions — Pepperl+Fuchs
Machine down? We ship parts the same day.
New, surplus, and refurbished Pepperl+Fuchs inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.
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Independent Supplier Notice
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.