PEPPERL+FUCHS SCD2-STC-EX1 Transmitter Power Supply – SCD Series Intrinsically Safe Power Conditioner
When a field transmitter loses its isolated, conditioned power source in a hazardous-area installation, the consequences cascade instantly: 4–20 mA loops collapse, HART communication drops, and the control room goes blind to critical process variables. In Ex Zone 1 and Zone 2 environments — refineries, chemical reactors, offshore platforms — that loss of signal is not merely an inconvenience; it is a safety event. The transmitter power supply is the silent backbone that keeps every loop alive, every reading trustworthy, and every SIL-rated interlock armed.
The PEPPERL+FUCHS SCD2-STC-EX1 is a dual-channel, intrinsically safe transmitter power supply from the SCD Series — Pepperl+Fuchs’ dedicated platform for signal conditioning in explosion-protected environments. Engineered to IEC 60079 standards and certified for ATEX / IECEx applications, the SCD2-STC-EX1 occupies a well-established position in global process automation: it is the go-to solution for engineers who need reliable loop power and signal isolation without adding bulk to a DIN rail cabinet. Its compact two-channel footprint and plug-in terminal design make it a standard specification item across EPC contractors and end-user maintenance teams worldwide.
Technical Specifications
- Manufacturer: Pepperl+Fuchs
- Part Number / SKU: SCD2-STC-EX1
- Series: SCD (Signal Conditioning for Hazardous Areas)
- Function: Dual-channel transmitter power supply with galvanic isolation
- Input (Safe Area): 24 V DC loop supply (DIN rail bus or external)
- Output (Field Side): Intrinsically safe 4–20 mA, HART-transparent
- Channels: 2 (independent, galvanically isolated)
- Explosion Protection: [Ex ia] IIC — intrinsic safety, Zone 0/1/2 field device connection
- Certification: ATEX / IECEx (refer to current datasheet for certificate numbers)
- Mounting: DIN rail (35 mm TS 35)
- Terminals: Plug-in screw terminals for fast replacement
- Weight: approx. 790 g (packaged)
- Ambient Temperature: Per Pepperl+Fuchs SCD Series datasheet
- Standards: IEC 60079-11, EN 50020, IEC 61158 (HART)
Note: Always verify final parameters against the official Pepperl+Fuchs SCD2-STC-EX1 datasheet before engineering design-in.
Key Features & Benefits
- Dual-channel design — two independent loops in one slim housing, halving cabinet space versus single-channel alternatives
- Full galvanic isolation — eliminates ground loops and protects DCS/PLC inputs from field-side transients
- HART signal transparency — passes HART protocol without attenuation, enabling remote device configuration and diagnostics
- Intrinsic safety certification — connects directly to Zone 0/1/2 field transmitters without additional barriers in many configurations
- Plug-in terminals — module swap in under two minutes; no rewiring required during maintenance
- DIN rail bus power — draws supply from standard 24 V DC bus, simplifying cabinet wiring
- Proven SCD platform — part of a unified Pepperl+Fuchs ecosystem with consistent form factor and accessories
Industry & Equipment Applications
- Oil & Gas: Upstream wellhead instrumentation, downstream refinery process loops, offshore platform control panels
- Chemical & Petrochemical: Reactor temperature/pressure transmitter loops in classified areas
- Pharmaceutical: Clean-room and solvent-handling zones requiring Ex-rated instrumentation
- Water & Wastewater: Pump station level and flow transmitter conditioning
- Power Generation: Turbine hall and fuel-handling instrumentation cabinets
- Pulp & Paper / Food & Beverage: Process areas with flammable vapour risk requiring IS loop power
System Integration & Compatible Parts
The SCD2-STC-EX1 integrates seamlessly within the Pepperl+Fuchs SCD Series ecosystem. Typical system architecture pairs this unit with:
- Pepperl+Fuchs SCD Series power bus rails and termination modules
- Pepperl+Fuchs F-series and K-series Zener barriers (for mixed barrier/isolator cabinets)
- HART multiplexers and asset management systems (e.g., Emerson AMS, Honeywell FDM)
- DCS/PLC analog input cards from ABB, Siemens, Yokogawa, Emerson DeltaV
- Field transmitters: Endress+Hauser, Rosemount, Yokogawa, ABB — any 4–20 mA / HART device
Consult Pepperl+Fuchs system documentation or contact Konmask.com for cabinet layout and entity parameter verification.
Our Quality Assurance Process
- Source verification: Units sourced from authorised Pepperl+Fuchs distribution channels or directly from certified regional warehouses
- Visual & label inspection: Every unit checked for intact certification labels, undamaged housing, and correct part number marking
- Functional pre-check: Loop continuity and isolation resistance verified before dispatch where test equipment is applicable
- Secure packaging: Anti-static, moisture-barrier packaging with shock-absorbing inserts for international freight
- Documentation: Certificate of conformity and original manufacturer documentation supplied on request
How to Order
- Submit your enquiry via the Request a Quote button or email [email protected]
- Provide quantity, required delivery location, and any project-specific documentation needs (CoC, test report)
- Receive a formal quotation within 1 business day
- Confirm order — we issue a proforma invoice and arrange secure payment
- Dispatch with full tracking; typical lead time 3–10 business days depending on stock status
Why Choose Konmask.com?
- Specialist in industrial automation components — PLC, DCS, field instruments, and safety systems
- Global B2B supply with export documentation support (packing list, commercial invoice, CoO)
- Responsive technical pre-sales: our engineers speak your language — IEC, ATEX, SIL, HART
- Competitive pricing with no hidden fees; volume discounts available
- Trusted by EPC contractors, MRO teams, and OEM integrators across Asia, Europe, and the Middle East
Frequently Asked Questions
- Q: Is the SCD2-STC-EX1 suitable for Zone 0 field devices?
- A: The SCD2-STC-EX1 provides [Ex ia] IIC intrinsic safety output, which is certified for connection to Zone 0 field devices when entity parameters are respected. Always verify against the current certificate and your specific field device parameters.
- Q: Does it support HART communication?
- A: Yes. The SCD2-STC-EX1 is HART-transparent, passing the 1200/2200 Hz FSK signal without degradation, enabling full HART master communication to field devices.
- Q: Can I replace a single channel without shutting down the second channel?
- A: The two channels are independent. However, the physical module houses both channels; consult your site safety procedures before hot-swapping in a live cabinet.
- Q: What is the supply voltage requirement?
- A: The unit operates from a 24 V DC bus supply, typically provided via the SCD Series DIN rail power bus. Refer to the datasheet for exact voltage tolerance.
- Q: Do you provide the original Pepperl+Fuchs datasheet and ATEX certificate?
- A: Yes. We can supply the original manufacturer datasheet and ATEX/IECEx certificate copies upon request with your order.
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