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Pepperl+Fuchs KFD2-STC5-Ex1 (70124109)
by Pepperl+Fuchs
Read verified buyer reviews ↓OverviewThe Pepperl+Fuchs KFD2-STC5-Ex1 (Part No. 70124109) is a leading-edge 1-channel SMART Transmitter Power Supply, engineered for superior safety and reliability in demanding industrial settings. This robust isolated barrier is specifically designed to power and securely relay analog signals from 2-wire SMART transmitters or current sources located in hazardous environments. It provides an active 4–20 mA loop-powered output, guaranteeing precise and consistent signal delivery. Importantly, the KFD2-STC5-Ex1 supports HART bidirectional communication, facilitating effortless digital integration and sophisticated diagnostics with smart field devices. Its main function is to ensure secure and uncompromised signal transmission from dangerous locations to control systems in safe areas, thereby safeguarding personnel and operations. With SIL 2 certification (Systematic Capability SC 3) conforming to the rigorous IEC/EN 61508 standard, this device is an excellent option for safety-instrumented systems (SIS) across various process automation sectors. The KFD2-STC5-Ex1 further enhances system dependability through its outstanding 3-way galvanic isolation, effectively eliminating ground loops and improving signal integrity. Its compact 20 mm width allows for efficient space utilization, and it is designed for simple DIN rail mounting, making installation straightforward and adaptable in any control cabinet.Key Features Part Number: 70124109 – For exact model identification and procurement. 1-Channel Isolated Barrier: Delivers strong isolation and signal conditioning for a single input, optimizing space. Input Compatibility: Connects effortlessly with 2-wire SMART transmitters or current sources in hazardous locations. Active 4–20 mA Loop Output: Furnishes a dependable and industry-standard current signal to control systems. Power Supply: Functions effectively on a 24 V DC nominal supply (with a broad 20–30 V range), ensuring stable operation. HART Compatible: Full support for HART protocol enables digital communication, remote adjustments, and device diagnostics. SIL 2 Certified (SC 3): Meets stringent functional safety specifications according to IEC/EN 61508 for critical uses. 3-Way Galvanic Isolation: Provides isolation between input, output, and power, boosting signal integrity and system protection. DIN Rail Mountable: Enables fast and secure installation within control cabinets due to its narrow 20 mm housing. LED Status Indicators: Clear visual feedback for power, fault, and operational status, simplifying troubleshooting. IP20 Protection: Suitable for installation in safe zones, offering protection against solid objects larger than 12.5 mm. Technical Specifications Model: KFD2-STC5-Ex1 Part No.: 70124109 Input Signal: 4–20 mA from 2-wire transmitters Output Signal: Active 4–20 mA Voltage Supply: 20 to 30 V DC Isolation Voltage: 375 V AC (test voltage) Mounting Type: DIN rail (according to EN 60715) Housing Width: 20 mm Operating Temperature Range: –20 °C to +60 °C Protection Rating: IP20 Signal Type: Analog with HART passthrough capability Safety Compliance: SIL 2 / SC 3 (certified to IEC/EN 61508) Certifications: ATEX, IECEx, UL, CSA (specific certifications may vary by variant) Applications Process Automation: Delivers a reliable and isolated analog signal interface for crucial process control loops. Chemical & Oil Industries: Essential for secure signal transmission from hazardous areas, ensuring compliance and continuous operation. Water & Wastewater Facilities: Perfect for integrating distant transmitters and maintaining signal integrity in challenging settings. Pharmaceutical Plants: Guarantees functional safety and precise control for sensitive and regulated processes. DCS/PLC Integration: Fully compatible with standard analog input cards of Distributed Control Systems (DCS) and Programmable Logic Controllers (PLCs). Why ChooseThe KFD2-STC5-Ex1 by Pepperl+Fuchs is your ideal solution for guaranteeing robust communication and safety in demanding industrial environments. Its SIL 2 certification and HART compatibility mean top-tier performance for critical applications. The advanced 3-way galvanic isolation ensures signal integrity, while its compact design allows for efficient space in any cabinet. Trust this device for reliable operation where precision and safety are paramount.Order NowEnhance your industrial operations with the Pepperl+Fuchs KFD2-STC5-Ex1. Contact us today to place your order or to learn more about how this advanced SMART Transmitter Power Supply can benefit your specific application.FAQWhat is the primary function of the KFD2-STC5-Ex1?Its primary function is to safely transmit analog signals from 2-wire SMART transmitters or current sources in hazardous locations to control systems in safe areas, while also powering these devices.What is HART communication, and why is it important for this device?HART (Highway Addressable Remote Transducer) is a widely used protocol for digital communication over analog wires. For the KFD2-STC5-Ex1, HART compatibility enables advanced diagnostics, remote configuration, and greater integration with intelligent field devices, enhancing system efficiency and maintenance.What does SIL 2 certification mean for this product?SIL 2 (Safety Integrity Level 2) certification, according to IEC/EN 61508, indicates that the device meets high functional safety requirements. This means it is suitable for use in safety-instrumented systems (SIS) where a specific level of risk reduction is required to prevent hazardous events.How does 3-way galvanic isolation benefit my system?3-way galvanic isolation separates the input, output, and power circuits, preventing ground loops. This significantly improves signal integrity by eliminating noise and interference, leading to more accurate and reliable data transmission in industrial environments.Can this device be installed in a wet or dusty environment?The KFD2-STC5-Ex1 has an IP20 protection rating, meaning it is protected against solid objects larger than 12.5 mm but offers no protection against water. It is suitable for installation in safe areas where it is not exposed to moisture or significant dust.
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Pepperl+Fuchs KFD2-STC5-Ex1 (70124109)
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
- Model: KFD2-STC5-Ex1
- Part No.: 70124109
- Input Signal: 4–20 mA from 2-wire transmitters
- Output Signal: Active 4–20 mA
- Voltage Supply: 20 to 30 V DC
- Isolation Voltage: 375 V AC (test voltage)
- Mounting Type: DIN rail (according to EN 60715)
- Housing Width: 20 mm
- Operating Temperature Range: –20 °C to +60 °C
- Protection Rating: IP20
- Signal Type: Analog with HART passthrough capability
- Safety Compliance: SIL 2 / SC 3 (certified to IEC/EN 61508)
- Certifications: ATEX, IECEx, UL, CSA (specific certifications may vary by variant)
Applications
- Process Automation: Delivers a reliable and isolated analog signal interface for crucial process control loops.
- Chemical & Oil Industries: Essential for secure signal transmission from hazardous areas, ensuring compliance and continuous operation.
- Water & Wastewater Facilities: Perfect for integrating distant transmitters and maintaining signal integrity in challenging settings.
- Pharmaceutical Plants: Guarantees functional safety and precise control for sensitive and regulated processes.
- DCS/PLC Integration: Fully compatible with standard analog input cards of Distributed Control Systems (DCS) and Programmable Logic Controllers (PLCs).
Why Choose the KFD2-STC5-Ex1?
The KFD2-STC5-Ex1 by Pepperl+Fuchs is your ideal solution for guaranteeing robust communication and safety in demanding industrial environments. Its SIL 2 certification and HART compatibility mean top-tier performance for critical applications. The advanced 3-way galvanic isolation ensures signal integrity, while its compact design allows for efficient space in any cabinet. Trust this device for reliable operation where precision and safety are paramount.
Availability & Shipping
- ▸In stock: KFD2-STC5-Ex1 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-STC5-Ex1 ships with a 1-Year PALM Parts warranty and a 30-day return window.
Frequently Asked Questions — Pepperl+Fuchs
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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.