PEPPERL+FUCHS KFD2-SOT3-EX2 Dual-Channel Switch Amplifier – K-System Isolated Barrier Series
Imagine a critical production line in a petrochemical plant where proximity sensors in Zone 1 hazardous areas must reliably transmit discrete signals to the safe-side PLC — without a properly certified signal isolator, a single electrical fault could trigger a catastrophic ignition, halt operations, or worse, endanger lives. The PEPPERL+FUCHS KFD2-SOT3-EX2 Switch Amplifier eliminates this risk by providing galvanically isolated, intrinsically safe signal conditioning between the hazardous field and the control room, making it an indispensable component in any safety-critical automation architecture.
Within the renowned PEPPERL+FUCHS K-System family — one of the most trusted Ex isolation platforms in global industrial automation — the KFD2-SOT3-EX2 occupies a key position as a dual-channel, 24 V DC powered switch amplifier designed for NAMUR sensors and mechanical contacts in Ex Zone 0/1/2 and Zone 20/21/22 environments. Backed by PEPPERL+FUCHS’ decades of leadership in explosion protection technology, this module is deployed across refineries, chemical plants, offshore platforms, and pharmaceutical facilities worldwide.
Technical Specifications
- Model: KFD2-SOT3-EX2
- Manufacturer: PEPPERL+FUCHS
- Series: K-System (DIN Rail Isolated Barriers)
- Number of Channels: 2 (dual-channel)
- Supply Voltage: 20–35 V DC (via K-System power rail)
- Input: NAMUR sensors (EN 60947-5-6) / mechanical contacts
- Output: Relay output, normally open / normally closed
- Ex Classification: II (1) G [Ex ia Ga] IIC / II (1) D [Ex ia Da] IIIC
- Safe Area Supply: 24 V DC (K-BUS power rail)
- Ambient Temperature: -20 °C to +60 °C
- Protection Degree: IP20
- Mounting: DIN rail (35 mm)
- Housing Width: 20 mm (single-width K-System module)
- Certifications: ATEX, IECEx, cULus
- Weight: 160 g
Note: Always refer to the official PEPPERL+FUCHS datasheet for the most current and complete specifications before engineering or installation.
Key Features & Benefits
- Dual-channel design — doubles signal density per DIN rail slot, reducing panel space and wiring costs
- Galvanic isolation — complete electrical separation between hazardous field and safe-side control system, protecting both personnel and equipment
- NAMUR & mechanical contact compatibility — universal input flexibility for diverse sensor types without additional adapters
- Relay output — robust, noise-immune discrete output suitable for direct PLC/DCS digital input cards
- K-BUS power rail integration — eliminates individual power wiring per module, simplifying cabinet assembly and maintenance
- LED status indication — real-time channel status and fault diagnostics visible at the module face, reducing MTTR
- Compact 20 mm housing — high-density installation in space-constrained marshalling cabinets
- Wide ambient temperature range — reliable operation in harsh industrial environments from -20 °C to +60 °C
- Multi-standard certification (ATEX / IECEx / cULus) — accepted for global project deployment without re-certification
Industry & Equipment Applications
- Oil & Gas: Wellhead control panels, pipeline monitoring, compressor stations — Zone 1/2 sensor interfacing
- Petrochemical & Refining: Reactor level and flow switch signals, safety instrumented systems (SIS)
- Pharmaceutical & Fine Chemical: Zone 21/22 dust-hazardous area sensor isolation in batch processing
- Offshore Platforms: Marine-grade Ex signal conditioning for topside and subsea instrumentation
- Power Generation: Turbine and boiler control room signal marshalling
- Water & Wastewater: Pump station and treatment plant sensor interfacing in classified areas
- Mining: Underground conveyor and ventilation system discrete signal isolation
System Integration & Compatible Parts
The KFD2-SOT3-EX2 is designed for seamless integration within the PEPPERL+FUCHS K-System ecosystem. Typical companion components include:
- Power supplies: KFD2-EB2 (K-System power bus module), KSD2-GS-1 (segment coupler)
- Termination boards: F-LB-1.20 series field termination assemblies for marshalling
- Surge protection: P+F MTL surge arrestors for field cable protection
- Compatible sensors: NAMUR inductive proximity sensors (NJ series, NCB series), mechanical float switches, pressure switches with NAMUR output
- DCS/PLC integration: Compatible with Siemens S7, Rockwell ControlLogix, Honeywell Experion, ABB 800xA, Yokogawa CENTUM digital input modules
Contact our technical team at support@konmask.com for system architecture consultation and BOM verification.
Our Quality Assurance Process
At Konmask.com, every PEPPERL+FUCHS module we supply undergoes a rigorous multi-stage verification process before shipment:
- Source verification: All units are sourced from authorized distributors or factory-direct channels with full traceability documentation
- Visual & label inspection: Holographic labels, date codes, and housing integrity checked against genuine product references
- Functional pre-check: Where applicable, modules are bench-tested for basic electrical continuity and LED response
- Packaging integrity: Original anti-static packaging preserved; re-sealed units are clearly disclosed
- Documentation package: CE declaration, calibration certificates, and test reports available upon request
How to Order
- Submit your inquiry via the Contact / RFQ form on this page or email support@konmask.com
- 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 DHL / FedEx / sea freight with full export documentation (commercial invoice, packing list, COO)
- Track your shipment via our post-order notification system
📞 WhatsApp / WeChat: +0086 19859288691 | ✉️ support@konmask.com
Why Choose Konmask.com?
- ✅ Specialist in industrial automation components — PLC, DCS, Ex barriers, drives, and instrumentation
- ✅ Global B2B supply — serving engineering contractors, EPCs, and MRO teams in 40+ countries
- ✅ Competitive pricing — direct sourcing relationships enable cost-effective quotes for both small and large orders
- ✅ Fast response — dedicated account managers, no automated bots on inquiry handling
- ✅ Full export compliance — experienced in export documentation, LC, T/T, and customs clearance support
- ✅ Obsolete & hard-to-find parts — extensive network for discontinued or long lead-time automation components
Frequently Asked Questions
Q: Is the KFD2-SOT3-EX2 suitable for SIL-rated safety loops?
A: The KFD2-SOT3-EX2 is certified for use in intrinsically safe circuits. For SIL suitability in a specific safety function, please consult the PEPPERL+FUCHS SIL datasheet and your functional safety engineer, as SIL rating depends on the complete safety loop architecture.
Q: Can this module accept a 2-wire NAMUR sensor directly?
A: Yes. The KFD2-SOT3-EX2 is designed to interface directly with NAMUR-compliant 2-wire inductive proximity sensors per EN 60947-5-6, as well as mechanical contacts.
Q: What is the difference between KFD2-SOT3-EX2 and KFD2-SOT3-EX1?
A: The KFD2-SOT3-EX2 is a dual-channel module (2 independent input/output channels in one housing), while the KFD2-SOT3-EX1 is a single-channel variant. The dual-channel version offers higher wiring density and is preferred for large I/O marshalling applications.
Q: Do you supply original PEPPERL+FUCHS products only?
A: Yes. Konmask.com exclusively supplies genuine PEPPERL+FUCHS products. We do not deal in counterfeit or unauthorized replicas. Authenticity documentation is available upon request.
Q: What is the typical lead time for KFD2-SOT3-EX2?
A: Lead time varies by stock availability. In-stock units typically ship within 3–5 business days. For larger quantities or special configurations, please submit an RFQ for a confirmed lead time.
Q: Can you provide an export commercial invoice and certificate of origin?
A: Yes. We provide full export documentation including commercial invoice, packing list, and certificate of origin (COO) for all international shipments.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
