KFD2-STC4-Ex1.2O Pepperl+Fuchs Power Supply Isolated Barrier
Manufacturer: Pepperl+Fuchs
Product No.: KFD2-STC4-Ex1.2O
Condition： In stock
Product Type: Power Supply Isolated Barrier
Product Origin: USA
Payment: T/T, Western Union
Weight: 150g
Shipping port: Xiamen
Warranty: 12 months
Estimate delivery times: 12-26 days (International), 3-6 days (United States).
Return within 30 days of purchase. Duties & taxes are non-refundable.
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KFD2-STC4-Ex1.2O SMART Transmitter Power Supply
Pepperl+Fuchs KFD2-STC4-Ex1.2O is a high-integrity isolated barrier for hazardous-area analog signal transmission.
The module powers SMART transmitters while maintaining galvanic isolation between field and control systems.
Its dual-output architecture enables simultaneous signal distribution to multiple control channels.
The device supports HART, BRAIN, and Foxboro communication protocols.
This compact DIN-rail barrier improves signal integrity in process automation environments.
Functional Configuration Breakdown
| Configuration Layer | Engineering Definition |
|---|---|
| KFD2-STC4-Ex1.2O | SMART transmitter isolated barrier |
| 1-Channel | Single analog input isolation architecture |
| Dual Output | Two isolated 0/4-20 mA outputs |
| SIL 3 | Functional safety integrity compliance |
| Power Rail | 24 VDC DIN rail supply integration |
Signal Processing Architecture
- 1-channel isolated barrier design
- Supports 2-wire SMART transmitters
- Supports 3-wire SMART transmitters
- Supports 2-wire SMART current sources
- Dual isolated analog output channels
- Integrated HART communication transfer
- Bidirectional digital signal transmission
- Integrated test sockets for HART communicators
Supported Communication Protocols
- HART protocol
- BRAIN protocol
- Foxboro SMART protocol
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Pepperl+Fuchs |
| Model | KFD2-STC4-Ex1.2O |
| Module Type | SMART transmitter power supply isolated barrier |
| Signal Type | Analog input |
| Safety Integrity Level | SIL 3 |
| Supply Voltage | 20 to 35 VDC |
| Power Consumption | 2.4 W |
| Power Dissipation | 1.8 W |
| Input Signal | 0/4 to 20 mA |
| Output Signal | Dual 0/4 to 20 mA |
| Load Resistance | 0 to 550 Ω at 20 mA |
| Ripple | 50 µA rms maximum |
| Settling Time | 200 µs |
| Rise/Fall Time | 20 µs |
| Bandwidth | 0 to 7.5 kHz |
| Ambient Temperature | -20°C to +60°C |
| Degree of Protection | IP20 |
| Isolation Voltage | 375 V peak |
| Housing Dimensions | 20 × 124 × 115 mm |
| Weight | Approx. 200 g |
| Mounting | 35 mm DIN rail |
Hazardous Area Certification Matrix
| Certification | Approval Scope |
|---|---|
| ATEX | BAS 99 ATEX 7060 X |
| IECEx | IECEx BAS 04.0016X |
| UL | cULus approval |
| IEC/EN 61508 | SIL 3 functional safety |
| Explosion Protection | Ex ia / Ex nA certified |
Intrinsic Safety Parameters
- Maximum safe voltage Um: 250 V
- Open circuit voltage Uo: 25.4 V
- Maximum output current Io: 115 mA
- Maximum power Po: 584 mW
- Internal capacitance Ci: 12 nF
- Internal inductance Li: 0 mH
Diagnostic and Reliability Features
- Integrated HART communication monitoring
- Bidirectional digital signal transparency
- Low-noise analog signal transfer
- Electrical isolation supervision
- Front LED operating indication
- Integrated test sockets for commissioning
- Functional safety process integrity
Suitable Equipment and Applications
- Process automation systems
- Hazardous-area instrumentation loops
- Oil and gas process plants
- Chemical processing facilities
- Refinery automation systems
- HART-enabled field transmitter networks
- Intrinsic safety signal interfaces
- Industrial DCS and PLC environments
Global PLC Spare HUB's Insight
KFD2-STC4-Ex1.2O provides stable intrinsic safety isolation for demanding process automation environments.
The dual-output structure simplifies signal distribution across redundant control architectures.
Engineers value the integrated HART communication access during commissioning and diagnostics.
The SIL 3 certification supports high-integrity safety instrumented system applications.
The module performs effectively in hazardous-area installations requiring reliable analog signal isolation.
The compact DIN-rail structure improves cabinet space utilization in process industries.
Engineering Installation Recommendations
- Use shielded instrumentation cable for analog signal integrity
- Verify hazardous-area grounding practices before startup
- Maintain proper separation from high-voltage cabling
- Inspect terminal tightness during preventive maintenance
- Validate HART loop resistance during commissioning
Shipping and Logistics Service
- FedEx international express shipping available
- UPS industrial logistics supported
- DHL worldwide delivery service available
- Protective anti-static packaging included
- Typical dispatch within 24-48 hours
12-Month Warranty Coverage
- 12-month warranty support included
- Technical assistance available during warranty period
- Functional inspection completed before shipment
- Industrial export-grade protective packaging included
Professional FAQ
Why does this barrier support dual analog outputs?
Dual outputs allow simultaneous signal transmission to separate control systems.
How does SIL 3 improve industrial process safety?
SIL 3 certification supports higher integrity in safety instrumented systems.
Why is galvanic isolation critical in hazardous-area applications?
Isolation prevents dangerous electrical transfer between safe and hazardous zones.
What installation factor most affects HART communication stability?
Proper loop resistance and shielded cabling improve communication reliability.
Which industries commonly deploy this isolated barrier?
Oil, gas, refining, and chemical facilities frequently use this signal isolation device.
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Q: Are these parts 100% original and new?
A: Yes. Every component is guaranteed to be 100% original, brand-new, and factory-sealed. We also provide a 12-month comprehensive warranty for your peace of mind.
Q: How fast is the shipping to my country?
A: For in-stock items, we offer same-day dispatch. International express shipping (DHL/FedEx/UPS) typically delivers within 3–5 business days worldwide.
Q: Can I get a formal quotation with shipping costs?
A: Absolutely. Our sales team is ready to provide a detailed Proforma Invoice (PI) including the most competitive shipping rates for your location.
Q: Do you offer discounts for bulk orders?
A: We provide volume-based pricing for large projects or multiple-item orders. Please contact us to get our Best Price Guarantee.
12-Month Comprehensive Warranty
Every part supplied by Global PLC Spare Hub is covered by a 12-month warranty from the date of invoice.
- Coverage: Functional defects and hardware failures under normal operating conditions.
- Commitment: We provide immediate repair, replacement, or a full refund for any verified defective components to minimize your operational downtime.
Returns & Exchange Policy
We offer a 30-day return policy to ensure you receive the exact part your system requires.
- Eligibility: Returns are accepted for uninstalled items in their original, factory-sealed packaging.
- RMA Process: Please contact our support team to obtain a Return Merchandise Authorization (RMA) number before shipping.
- Fast Processing: Refunds or exchanges are processed within 3–5 business days after the returned item passes our technical inspection.
Need Technical Assistance?Not sure if this part is compatible with your system? [Consult our Engineers] before purchasing to ensure 100% compatibility.
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