PEPPERL FUCHS KFD2-STC4-EX1.20 SMART Transmitter Power Supply – KFD2 Series
Imagine a critical 4–20 mA loop powering a pressure transmitter deep inside a Zone 1 hazardous area suddenly losing its isolated supply. Within seconds, the field signal collapses, the DCS loses visibility of the process variable, and operators are flying blind — a scenario that can cascade into unplanned shutdowns, safety incidents, and costly production losses. The PEPPERL FUCHS KFD2-STC4-EX1.20 exists precisely to prevent this. As a dedicated SMART transmitter power supply with galvanic isolation and intrinsic safety barriers built in, it keeps the loop alive, the signal clean, and the process under control — even in the most demanding explosive atmospheres.
Within the KFD2 product family — Pepperl+Fuchs’ flagship DIN-rail signal conditioning platform — the KFD2-STC4-EX1.20 occupies the role of a high-integrity, single-channel SMART transmitter conditioner. It is engineered to interface 2-wire HART-compatible transmitters in Ex Zone 0/1/2 (IIC) environments with safe-area control systems, delivering a galvanically isolated, loop-powered 4–20 mA output alongside full HART pass-through. Globally, this module is a reference design in oil & gas, chemical, and pharmaceutical plants where IEC 60079 compliance and SIL-rated loops are non-negotiable.
Technical Specifications
- Model: KFD2-STC4-EX1.20
- Manufacturer: Pepperl+Fuchs
- Function: SMART Transmitter Power Supply with galvanic isolation
- Input (Field Side): 2-wire HART transmitter, 4–20 mA
- Output (Safe Side): 4–20 mA isolated analog output
- HART Communication: Transparent pass-through (both directions)
- Supply Voltage: 20–35 V DC (via KF-bus or external)
- Isolation: 3-way galvanic isolation (input / output / power)
- Hazardous Area Approval: ATEX / IECEx — Ex ia IIC T4 Ga
- Mounting: DIN rail (35 mm), KF-bus compatible
- Housing Width: 20 mm
- Operating Temperature: -20 °C to +60 °C
- Weight: approx. 160 g
- Certifications: ATEX, IECEx, cULus (verify current certificate for SIL use)
Note: Always verify specifications against the official Pepperl+Fuchs datasheet for your specific revision. Konmask does not fabricate or alter manufacturer specifications.
Key Features & Benefits
- 3-Way Galvanic Isolation — eliminates ground loops and protects both field instruments and DCS inputs from transient damage.
- Full HART Transparency — enables remote device configuration, diagnostics, and multivariable access without additional hardware.
- Intrinsic Safety (Ex ia IIC) — certified for Zone 0/1/2 installation, covering the most stringent explosive gas atmospheres including hydrogen (Group IIC).
- Compact 20 mm DIN-Rail Form Factor — maximizes cabinet density; integrates seamlessly into KF-bus power rail systems.
- Wide Supply Voltage Range — tolerates typical DC bus fluctuations without signal degradation.
- High Signal Accuracy — low error contribution to the measurement loop, supporting SIL-rated applications.
- Plug-and-Play Replacement — drop-in compatible with existing KFD2-series installations, minimizing downtime during maintenance.
Industry & Equipment Applications
- Oil & Gas: Wellhead pressure/temperature transmitters, pipeline flow meters, separator level instruments in Zone 1 areas.
- Chemical & Petrochemical: Reactor vessel instrumentation, solvent storage tank level, flammable gas detection loops.
- Pharmaceutical & Fine Chemical: Clean-room process transmitters requiring galvanic isolation for GMP compliance.
- Power Generation: Turbine lube-oil system sensors, boiler drum level transmitters.
- Water & Wastewater: Submersible pressure transmitters in classified pump stations.
- Pulp & Paper / Food & Beverage: Hygienic pressure and flow transmitters requiring loop isolation.
System Integration & Compatible Parts
The KFD2-STC4-EX1.20 is designed for seamless integration within the Pepperl+Fuchs KFD2 ecosystem and standard DCS/PLC architectures:
- Power Rails: KF-BUS power rail systems (e.g., KSD2-GW-…) for centralized supply.
- Segment Couplers: Compatible with FOUNDATION Fieldbus and PROFIBUS PA segment couplers when used in hybrid architectures.
- DCS Inputs: Direct connection to Emerson DeltaV, Honeywell Experion, ABB 800xA, Siemens PCS 7 AI cards (4–20 mA).
- HART Multiplexers: Works with Pepperl+Fuchs, Emerson, and third-party HART multiplexers for asset management.
- Related Modules: KFD2-STC4-EX1 (non-SMART variant), KFD2-STC4-EX2 (dual-channel), KFD2-UT2-EX1 (universal transmitter supply).
Our Quality Assurance Process
At Konmask.com, every unit of the KFD2-STC4-EX1.20 we supply goes through a documented sourcing and verification process:
- Authorized Supply Chain: Sourced from verified distributors and authorized Pepperl+Fuchs channel partners — no grey-market or counterfeit risk.
- Visual & Label Inspection: Each unit is inspected for intact certification labels, correct model number, and undamaged housing before dispatch.
- Traceability: Batch and serial records maintained for full supply chain traceability, supporting your plant’s audit requirements.
- Packaging Integrity: Shipped in original or equivalent ESD-safe packaging with desiccant where required.
- Documentation: Certificate of conformity and original datasheet available on request.
How to Order
- Submit an inquiry via the Contact / RFQ form on this page or email [email protected].
- Provide your required quantity, delivery timeline, and destination country.
- Our team will respond within 1 business day with availability, lead time, and a formal quotation.
- Upon PO confirmation, we arrange shipment with full documentation (packing list, CoC, commercial invoice).
For urgent requirements or large-volume orders, call/WhatsApp: +0086 19859288691.
Why Choose Konmask.com?
- Industrial Automation Specialists — we focus exclusively on PLC, DCS, and field instrumentation components; no generalist distractions.
- Global B2B Export Experience — serving engineering firms, EPCs, and MRO teams across Asia, the Middle East, Europe, and the Americas.
- Fast Inquiry Response — dedicated technical sales team responds within 24 hours with accurate stock and pricing.
- Competitive Pricing — direct relationships with distributors allow us to offer market-competitive quotes without compromising authenticity.
- Technical Pre-Sales Support — our engineers can assist with cross-referencing, compatibility checks, and application validation before you commit.
Frequently Asked Questions
Q: Is the KFD2-STC4-EX1.20 suitable for Zone 0 installations?
A: Yes. The module carries Ex ia IIC T4 Ga certification, which permits installation of connected field devices in Zone 0 (the highest hazard classification). Always verify the entity parameters match your transmitter’s specifications.
Q: Does this module support HART communication?
A: Yes. The KFD2-STC4-EX1.20 provides transparent HART pass-through in both directions, allowing full HART communication between your DCS/asset management system and the field transmitter without any additional hardware.
Q: Can I use this module as a direct replacement for an older KFD2-STC4-EX1?
A: In most cases, yes — the KFD2-STC4-EX1.20 is the SMART-capable successor and is mechanically and electrically compatible with the same DIN-rail slot. Confirm wiring terminal assignments against your existing documentation before installation.
Q: What is the minimum order quantity?
A: We supply from single units upward. Contact us with your quantity for the most accurate pricing and lead time.
Q: Do you provide a certificate of conformity?
A: Yes. A certificate of conformity and the original manufacturer datasheet are available upon request with every order.
Q: What is the typical lead time?
A: Lead time depends on current stock levels and your destination. Submit an RFQ and we will confirm within 1 business day.
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Original Source: https://Konmask.com
Contact: [email protected] | +0086 19859288691
