Process Automation Solution – YOKOGAWA SEC401-11-S3 | S3 Series Signal Converter
Where This Product Is Used
The Yokogawa SEC401-11-S3 Signal Converter is deployed across demanding industrial environments where accurate signal transmission and isolation are mission-critical. Typical application scenarios include:
- Oil & Gas Plants – Converting 4–20 mA transmitter signals to isolated outputs for DCS/SCADA integration in upstream and downstream processes.
- Chemical & Petrochemical Facilities – Providing galvanic isolation between field instruments and control rooms to prevent ground loops and protect sensitive equipment.
- Power Generation – Signal conditioning for turbine, boiler, and generator monitoring loops where signal integrity is non-negotiable.
- Water & Wastewater Treatment – Interfacing legacy 2-wire transmitters with modern PLC/DCS systems in pump stations and treatment plants.
- Pharmaceutical Manufacturing – Ensuring clean, noise-free signal paths in GMP-regulated process lines.
- Pulp & Paper / Food & Beverage – Reliable signal conversion in high-humidity or electrically noisy plant environments.
Technical Specifications
- Model: SEC401-11-S3
- Series: S3
- Manufacturer: Yokogawa Electric Corporation
- Function: Signal Converter / Signal Isolator
- Input Signal: 4–20 mA DC (2-wire / 4-wire configurable)
- Output Signal: 4–20 mA DC isolated
- Power Supply: 24 V DC (loop-powered or external, per variant)
- Isolation: 3-way isolation (Input / Output / Power)
- Accuracy: ±0.1% of span (typical)
- Operating Temperature: -10°C to +60°C
- Enclosure: DIN rail mount, compact form factor
- Weight: ~1,000 g (packaged)
- Compliance: CE, RoHS
Why Engineers Specify This Model
- Proven Yokogawa Reliability – Backed by decades of field deployment in tier-1 process plants globally.
- 3-Way Galvanic Isolation – Eliminates ground loops and protects both field devices and control systems.
- Drop-in DIN Rail Installation – Minimizes panel space and simplifies retrofits into existing marshalling cabinets.
- Wide Operating Range – Performs consistently across temperature extremes common in outdoor or non-climate-controlled enclosures.
- Long-Term Availability – S3 Series components are stocked and supported for extended plant lifecycles.
Complete System Bill of Materials
For a complete signal conditioning loop using the SEC401-11-S3, engineers typically specify:
- Yokogawa SEC401-11-S3 – Signal Converter (this unit)
- 24 VDC DIN Rail Power Supply (e.g., Yokogawa or Phoenix Contact)
- DIN Rail (35 mm TS-35) and end brackets
- Shielded twisted-pair cable (per ISA-5.1 wiring standard)
- Terminal blocks and cable ferrules
- Upstream transmitter (pressure, flow, temperature, level)
- Downstream DCS/PLC analog input card
Compliance & Industry Standards
- CE Marking – Electromagnetic Compatibility (EMC) Directive
- RoHS Compliant – Restriction of Hazardous Substances
- Designed in alignment with IEC 60381 (Analog signals for process control)
- Compatible with ISA-5.1 instrumentation wiring practices
- Suitable for use in NAMUR NE 43 signal range environments
Quality Assurance & Sourcing
Every Yokogawa SEC401-11-S3 unit shipped by Konmask.com undergoes the following verification process:
- Visual inspection against OEM reference imagery and label standards
- Traceability check on batch/lot documentation where available
- Sourced from authorized distributors or verified surplus channels
- Packaged in anti-static, moisture-resistant materials for safe transit
We do not sell counterfeit or unverified components. All products are described accurately and any cosmetic wear on surplus units is disclosed.
How to Source This Part
To place an order or request a quote for the Yokogawa SEC401-11-S3:
- Online: Add to cart directly on this page and proceed to checkout.
- Bulk / Project Inquiry: Email support@konmask.com with your project BOM and required quantity.
- Lead Time: In-stock units ship within 1–3 business days. Contact us for ETA on out-of-stock items.
- Export / International Orders: We support cross-border shipments. Contact us for customs documentation assistance.
Application-Specific FAQ
Q: Can the SEC401-11-S3 be used with HART-enabled transmitters?
A: The SEC401-11-S3 passes the 4–20 mA signal; HART communication superimposed on the loop may pass through depending on the specific variant. Confirm with your instrumentation engineer for HART-transparent applications.
Q: Is this unit suitable for hazardous area (Ex) installation?
A: The standard SEC401-11-S3 is rated for general industrial use. For Zone 1/2 or Division 1/2 hazardous areas, consult Yokogawa for the appropriate Ex-certified variant.
Q: What is the difference between SEC401-11 and SEC401-11-S3?
A: The “-S3” suffix denotes the S3 Series generation, which includes updated isolation architecture and improved EMC performance over earlier variants.
Q: Can I use this converter to interface a 2-wire transmitter with a PLC analog input?
A: Yes. This is one of the most common use cases. The SEC401-11-S3 provides the necessary isolation and signal buffering to protect PLC inputs from field-side faults.
Q: Do you provide calibration certificates?
A: Factory calibration documentation is included where available. Contact us if a specific calibration certificate is required for your QA process.
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