Process Control Input Solution – YOKOGAWA EH1*A | CENTUM Series
Where This Product Is Used
The YOKOGAWA EH1*A Input Module is deployed across demanding industrial environments where signal integrity and system reliability are non-negotiable. Typical deployment sites include:
- Oil & Gas Refineries — Field signal acquisition from pressure transmitters, thermocouples, and flow meters integrated into CENTUM DCS architectures.
- Chemical & Petrochemical Plants — Multi-loop process monitoring where analog input accuracy directly impacts product quality and safety interlock performance.
- Power Generation Facilities — Turbine and boiler control systems requiring high-density I/O with deterministic scan cycles.
- Pulp & Paper Mills — Continuous process lines where uninterrupted signal acquisition is critical to throughput and quality control.
- Water & Wastewater Treatment — SCADA-integrated control panels monitoring flow, level, and chemical dosing parameters.
- Pharmaceutical Manufacturing — GMP-compliant process control loops requiring validated, traceable signal inputs.
Technical Specifications
- Part Number: EH1*A (EH1-A series)
- Manufacturer: YOKOGAWA Electric Corporation
- Module Type: Analog / Digital Input Module
- Compatible Platform: CENTUM CS / CENTUM VP / STARDOM DCS Series
- Signal Types Supported: 4–20 mA, 1–5 V DC, Thermocouple (TC), RTD, Pulse Input (model-dependent)
- Isolation: Channel-to-channel and channel-to-bus isolation
- Scan Cycle: Configurable; typically 100 ms – 1 s
- Operating Temperature: 0°C to +55°C
- Storage Temperature: -20°C to +70°C
- Humidity: 5% to 95% RH (non-condensing)
- Power Supply: Supplied via backplane bus
- Mounting: DIN rail / rack-mount via CENTUM I/O nest
- Weight: Approx. 60 g
- Certifications: CE, UL, ATEX (zone-dependent configurations)
Note: Exact channel count, input range, and resolution vary by sub-model suffix. Contact Konmask for datasheet confirmation on your specific EH1*A variant.
Why Engineers Specify This Model
- Native CENTUM Integration — Plug-and-play compatibility with YOKOGAWA CENTUM VP and CS 3000 systems eliminates custom driver development and reduces commissioning time.
- High Signal Fidelity — Precision A/D conversion with hardware filtering ensures accurate process variable representation even in electrically noisy plant environments.
- Hot-Swap Capability — Supports online replacement in redundant configurations, enabling maintenance without process shutdown.
- Proven Field Reliability — YOKOGAWA’s I/O modules are benchmarked for MTBF exceeding 500,000 hours in continuous process environments.
- Scalable Architecture — Modular design allows incremental I/O expansion as process requirements grow, protecting capital investment.
- Diagnostic Transparency — Built-in self-diagnostics report module health to the DCS engineering station, enabling predictive maintenance workflows.
Complete System Bill of Materials
For a fully operational YOKOGAWA CENTUM input subsystem using the EH1*A, engineers typically specify the following complementary components:
- CENTUM VP / CS 3000 Field Control Station (FCS) — e.g., AFV10D, AFV30D
- I/O Nest / Baseplate — e.g., ANB10D, ANB11D
- Power Supply Module — e.g., APS10D
- Communication Bus Module — e.g., ACM11
- Field Terminal Assembly (FTA) — e.g., ATD5D for signal marshalling
- Redundant CPU Module (optional) — e.g., ACF11
- Engineering Workstation with CENTUM VP R6 software license
Contact support@konmask.com for a complete BOM quotation tailored to your project scope.
Compliance & Industry Standards
- IEC 61511 — Functional Safety for Process Industry Sectors (SIL-rated loop configurations)
- IEC 61508 — Functional Safety of E/E/PE Safety-related Systems
- IEC 61131-2 — Programmable Controllers: Equipment Requirements and Tests
- NAMUR NE 43 — Standardization of the Signal Level for Fault Information of Digital Transmitters
- CE Marking — EMC Directive 2014/30/EU; Low Voltage Directive 2014/35/EU
- UL Listed — UL 508 Industrial Control Equipment
- RoHS Compliant — Restriction of Hazardous Substances Directive 2011/65/EU
Quality Assurance & Sourcing
Konmask.com sources YOKOGAWA modules through verified industrial distribution channels with full traceability documentation. Every unit dispatched undergoes the following quality process:
- Visual Inspection — PCB, connector pins, and housing checked against OEM reference standards.
- Functional Verification — Power-on self-test and communication handshake confirmed prior to packaging.
- Authenticity Check — Serial number and firmware version cross-referenced against YOKOGAWA’s authorized product database.
- Anti-Static Packaging — Shipped in ESD-safe bags with moisture barrier and desiccant for long-haul freight.
- Documentation Package — Includes test report, packing list, and certificate of conformance upon request.
How to Source This Part
- Confirm Your Variant — Identify the exact EH1*A sub-model suffix from your existing system documentation or CENTUM VP hardware configurator.
- Request a Quote — Email support@konmask.com with your part number, quantity, and required delivery timeline.
- Lead Time Confirmation — Standard stock items ship within 3–7 business days. Non-stock variants: 2–6 weeks depending on YOKOGAWA factory allocation.
- Payment & Logistics — T/T, L/C, and PayPal accepted. DHL, FedEx, and sea freight options available with full export documentation (CO, packing list, commercial invoice).
- After-Sales Support — 12-month warranty on all supplied modules. Technical support available via email and WhatsApp.
Application-Specific FAQ
Q: Is the EH1*A compatible with CENTUM VP R6.09 and later?
A: Yes. The EH1*A series maintains backward compatibility across CENTUM VP R4 through R6.09+. Confirm firmware revision with your system integrator for edge-case configurations.
Q: Can this module be used in SIL 2 safety loops?
A: Certain EH1*A variants are qualified for use in SIL 2 loops when integrated with YOKOGAWA’s ProSafe-RS safety system. Consult the applicable SIL certificate and functional safety manual before specifying.
Q: What is the difference between EH1*A and EH1*B variants?
A: The suffix letter typically denotes hardware revision or regional certification variant. Contact Konmask with your system’s existing I/O nest model to confirm cross-compatibility.
Q: Do you supply new or refurbished units?
A: Konmask supplies both new OEM units and professionally refurbished modules. Condition is clearly stated on each listing and quotation. Refurbished units carry a 6-month warranty.
Q: Can you assist with CENTUM VP system expansion projects?
A: Yes. Konmask provides turnkey BOM support for DCS expansion projects, including I/O modules, power supplies, communication cards, and field terminal assemblies.
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