Honeywell KCD2-SCD-EX1 / KCD2-STC-EX1 SMART Transmitter Power Supply – KCD2 Series Isolated Safety Barrier
When a SMART transmitter in a hazardous area loses its dedicated power supply, the consequences cascade instantly: field instruments go blind, control loops fall open, and operators lose visibility into critical process variables — pressure, flow, temperature — at exactly the moment they need it most. Unplanned shutdowns, safety incidents, and costly production losses follow. The Honeywell KCD2-SCD-EX1 and KCD2-STC-EX1 SMART Transmitter Power Supply modules exist precisely to prevent this scenario, providing reliable, isolated power and signal conditioning between Ex-zone field devices and the safe-area control system.
Within the Honeywell KCD2 Series — one of the most widely deployed families of DIN-rail mounted safety barriers and signal conditioners in global process automation — the KCD2-SCD-EX1 and KCD2-STC-EX1 represent the dedicated SMART (4–20 mA / HART) transmitter power supply variants. Engineered for intrinsic safety (Ex ia) applications, these modules are trusted across oil & gas, chemical, pharmaceutical, and power generation facilities worldwide, where compliance with IEC 60079 and ATEX directives is non-negotiable.
Technical Specifications
- Model Numbers: KCD2-SCD-EX1 / KCD2-STC-EX1
- Brand: Honeywell (formerly Pepperl+Fuchs / Honeywell Process Solutions)
- Series: KCD2 — DIN-Rail Isolated Safety Barrier
- Function: SMART Transmitter Power Supply with galvanic isolation
- Signal Type: 4–20 mA / HART (Highway Addressable Remote Transducer)
- Hazardous Area Classification: Ex ia IIC (intrinsically safe, Group IIC)
- Approvals: ATEX, IECEx, FM, CSA (verify current certificate for your region)
- Mounting: DIN rail (35 mm)
- Housing: Compact single-channel module
- Supply Voltage: 20–35 V DC (loop-powered / external supply — refer to datasheet)
- Operating Temperature: -20 °C to +60 °C
- Protection Degree: IP20
- Dimensions: Standard KCD2 form factor (12.5 mm width)
Note: Always verify exact specifications against the official Honeywell datasheet for your specific revision. Konmask does not fabricate or alter manufacturer specifications.
Key Features & Benefits
- Galvanic Isolation: Full electrical isolation between hazardous-area field side and safe-area control side, eliminating ground loops and protecting DCS/PLC inputs.
- HART Transparency: Passes HART digital communication signals without attenuation, enabling remote configuration, diagnostics, and asset management of field transmitters.
- Intrinsic Safety (Ex ia): Limits energy in the hazardous zone to levels incapable of igniting explosive atmospheres — the safest and most widely accepted protection concept for Zone 0/1/2.
- Compact DIN-Rail Form Factor: 12.5 mm wide KCD2 housing maximizes cabinet density; compatible with standard KCD2 bus systems for simplified wiring.
- High Reliability: Honeywell’s proven KCD2 platform is field-tested across millions of measurement points globally, with a long track record of low failure rates in demanding process environments.
- Easy Replacement: Drop-in compatible with existing KCD2 installations — minimizes downtime during maintenance or upgrade cycles.
- Wide Approval Portfolio: ATEX / IECEx / FM / CSA certifications support global project deployment without re-engineering.
Industry & Equipment Applications
- Oil & Gas: Upstream wellhead instrumentation, midstream pipeline monitoring, downstream refinery process control — anywhere Ex ia barriers are mandated.
- Chemical & Petrochemical: Reactor temperature and pressure transmitter loops in Zone 1/2 classified areas.
- Pharmaceutical & Fine Chemical: cGMP-compliant process measurement with full HART diagnostics for validation documentation.
- Power Generation: Boiler, turbine, and balance-of-plant instrumentation requiring isolated 4–20 mA signal conditioning.
- Pulp & Paper / Water Treatment: Harsh-environment transmitter loops where galvanic isolation prevents ground-loop interference.
- Marine & Offshore: Hazardous-area instrumentation on FPSOs and offshore platforms requiring compact, certified barriers.
System Integration & Compatible Parts
The KCD2-SCD-EX1 and KCD2-STC-EX1 are designed to integrate seamlessly within the Honeywell KCD2 ecosystem:
- KCD2 Bus System: Compatible with KCD2 power bus rails for centralized 24 V DC supply distribution.
- Honeywell Experion PKS / TDC 3000: Direct interface to Honeywell DCS analog input cards via standard 4–20 mA.
- Third-Party DCS/PLC: Universal 4–20 mA output interfaces with Siemens, ABB, Emerson, Yokogawa, and Rockwell Automation systems.
- HART Multiplexers: Compatible with HART multiplexers (e.g., Honeywell, Pepperl+Fuchs) for multi-drop asset management.
- Field Transmitters: Powers any 2-wire SMART transmitter (pressure, differential pressure, temperature, flow) rated for Ex ia IIC.
Our Quality Assurance Process
At Konmask.com, every Honeywell KCD2-SCD-EX1 and KCD2-STC-EX1 unit we supply undergoes a rigorous sourcing and verification process:
- Sourced exclusively from authorized distributors and verified supply chains to ensure genuine Honeywell product.
- Visual and label inspection against Honeywell’s authentic product markings, certification labels, and date codes.
- Packaging integrity check — original factory packaging preserved where possible.
- Documentation provided: manufacturer datasheet, certificate of conformity available on request.
- All units are traceable to batch/lot records for full supply chain transparency.
How to Order
- Submit an Inquiry: Use the contact form on this page or email support@konmask.com with your required quantity and delivery timeline.
- Receive a Quote: Our technical sales team will respond within 1 business day with pricing, lead time, and availability confirmation.
- Order Confirmation: Confirm your purchase order; we accept T/T bank transfer and other B2B payment terms.
- Shipping: We ship globally via DHL, FedEx, UPS, and freight forwarder — with full export documentation.
- After-Sales Support: Technical support available post-delivery for installation and commissioning queries.
Why Choose Konmask.com?
- Industrial Automation Specialists: We focus exclusively on PLC, DCS, safety barriers, and process instrumentation — not a generalist marketplace.
- Genuine Products Guaranteed: Every part is sourced from verified supply chains with full traceability.
- Fast Global Shipping: Stocked items ship within 3–5 business days; expedited options available for urgent shutdowns.
- Technical Expertise: Our team includes experienced automation engineers who can advise on compatibility and system integration.
- Competitive B2B Pricing: Volume discounts available — contact us for project pricing on large quantities.
- Responsive Support: Dedicated account management and after-sales technical support in English and Chinese.
Frequently Asked Questions
Q: What is the difference between KCD2-SCD-EX1 and KCD2-STC-EX1?
A: Both are SMART transmitter power supply modules in the KCD2 series. The SCD variant typically refers to a signal conditioner with specific output configuration, while the STC variant may include additional termination or configuration options. Please consult the official Honeywell datasheet or contact our technical team for your specific application requirements.
Q: Are these modules suitable for Zone 0 hazardous areas?
A: The KCD2 Ex ia certified modules are generally approved for use with field devices located in Zone 0, 1, and 2 (Gas Groups IIA, IIB, IIC depending on the specific certificate). Always verify the current ATEX/IECEx certificate for your installation.
Q: Can I use these barriers with non-HART 4–20 mA transmitters?
A: Yes. The modules provide standard 4–20 mA power and signal conditioning. HART communication is transparent and does not interfere with conventional 4–20 mA operation.
Q: What DCS systems are compatible?
A: The 4–20 mA output is universally compatible with any DCS or PLC analog input card, including Honeywell Experion, Emerson DeltaV, Siemens PCS 7, ABB 800xA, and Yokogawa CENTUM.
Q: Do you provide certificates of conformity?
A: Yes. Certificates of conformity and manufacturer datasheets are available upon request for all orders.
Q: What is the minimum order quantity (MOQ)?
A: We supply from single units upward. Contact us for volume pricing on project quantities.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
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