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      EC402-51

      ESB Bus Coupler Module

      Product Information

      Product Describe

      ESB Bus Coupler Module

      (for N-IO/FIO, 2-Port)

      The ESB Bus Coupler Module is

      a communication module to

      connect the Field Control Unit

      and the Node Unit for

      ESB Bus via the ESB bus.

      • Manufacturer:
        Yokogawa
      • Product Category:
        DCS System
      • Estimated shipping dimensions:
        15.2 x 20.1 x 14 cm
      • Weight:
        0.24 kg
      • Tariff Code:
        8537101190
      • Country of origin:
        Japan
      • Place of shipment:
        Xiamen, Fujian, China
      • Product Type:
        ESB Bus Coupler
      • Category Series:
        Centum VP
      • Protection class:
        Standard type with no explosion protection
      • Main Type:
        With ISA Standard G3 option
      • Current consumption:
        0.5 A
      • Stock:
        30

      • New and original with factory sealed packing

        Brand new and 100% original unit, supplied in factory-sealed packaging, ensuring untouched condition and full manufacturer integrity.

      • New in opened package

        These parts are new. They have not been used, but their original packaging has been opened or the packaging is significantly aged.

      • New surplus

        New surplus item in unused condition, originally manufactured for distribution but not deployed in service.

      • Refurbished

        This product has been repaired by an authorized service center, and worn or aged parts have been replaced with qualified genuine parts. Warranty terms are subject to refurbishment certification and service policies.
      By purchasing this item, you agree to the Terms & Conditions
      Moore Automated is NOT an authorized distributor of Yokogawa
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      All our products come with a 1-year warranty for your peace of mind.

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          FAQ

          • What primary functional purpose does the EC402-51 module serve within Centum VP and Centum CS distributed control system architectures?
            The EC402-51 functions as a high-integrity analog control module, facilitating precise acquisition, conditioning, and output of analog process signals. It acts as the interface between field instrumentation and the DCS, enabling deterministic control and real-time monitoring of industrial processes.
          • How does the signal processing capability of EC402-51 enhance loop performance and measurement fidelity in critical process applications?
            The EC402-51 incorporates high-resolution A/D and D/A conversion, linearization routines, and galvanic isolation, ensuring that input and output signals are accurately represented within the DCS. This enhances control loop stability, minimizes noise susceptibility, and reduces offset drift in continuous process regulation.
          • Why is EC402-51 considered essential for high-reliability and safety-compliant operations in Centum VP/CS systems?
            By providing accurate and isolated analog interfacing, the EC402-51 ensures deterministic control and alarm signaling, critical for compliance with process safety standards. Its robust design guarantees uninterrupted operation in industrial environments with electrical noise, thermal variations, and mechanical vibration.
          • In what environmental conditions is EC402-51 validated to operate with consistent performance?
            The EC402-51 is specified for industrial conditions including wide temperature ranges, humidity, vibration, and electromagnetic interference, ensuring reliable operation in applications such as turbines, compressors, chemical reactors, and refinery processes.
          • How does EC402-51 maintain channel isolation and prevent crosstalk in densely populated DCS racks?
            The EC402-51 incorporates channel-to-channel galvanic isolation, shielded signal paths, and noise rejection circuitry, preserving signal fidelity and ensuring deterministic analog behavior even in racks with multiple high-speed or high-power modules.
          • Why is calibration and linearization critical when deploying EC402-51 in precision regulatory control applications?
            Calibration and linearization of the EC402-51 align the module’s digital representation with the actual physical variable, reducing measurement error, optimizing PID loop performance, and ensuring adherence to process and safety standards in high-accuracy operations.

          Learn More

          Product Applications
          • 1. Widely used in Nuclear, Gas Turbine, Steel, Miningand, Vessel Turret Mooring and other fields.
          • 2. It can improve production efficiency and product consistency.
          • 3. At the same time, it reduces labor costs and enhances operational safety.
          • 4. Ensures production continuity.
          • 5. Maintains the accuracy and stability of the control system.
          • 6. Supports system upgrades and expansion.
          • 7. Risk management and inventory strategies.
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          Solution Engineering & Product Selection We provide a detailed configuration list for each brand series model.
          Technical Support & Remote DiagnosticsContact miya via email: miya@mvme.cn.
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          Warranty Service One-year warranty
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          Delivery arrangements for automation equipment orders will depend on production cycles and project requirements. We accept TT payment, or as per customer requirements. Payment typically includes an advance payment and the balance due before shipment. All arrangements are strictly executed according to the contract to ensure successful order completion.

          • 20 Years of Excellence in Industrial Automation Supply

            For over 20 years, Moore Automated has been a trusted leader in the industrial automation supply industry. As a dependable automation parts supplier, we’ve expanded our product lines, grown a global customer base, and earned repeated recognition as a Most Trusted and Reliable Supplier Award.

            Our long-standing success reflects our commitment to quality, reliability, and customer satisfaction. Whether you’re sourcing hard-to-find components or need expert repairs, Moore Automated stands out among industrial automation parts suppliers for our experience, service, and unbeatable 1-year warranty.

          • Unbeatable 1-Year Warranty on Industrial Automation Parts

            When it comes to industrial automation supply, Moore Automated leads the way with exceptional quality and reliability. All of our PLC, DCS spare parts and repair services are backed by an unbeatable 1-year warranty, giving you the confidence you deserve when choosing an automation parts supplier.

            As one of the most trusted industrial automation parts suppliers, we understand the importance of dependable performance. That’s why we go beyond industry standards—offering a 1-year warranty that outperforms typical coverage. Whether you’re replacing obsolete components or maintaining critical systems, Moore Automated provides the high-quality parts and expert repairs you need.


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            With two decades of experience in industrial automation supply, we understand how vital speed and reliability are. That’s why we’re proud to be one of the few industrial automation parts suppliers offering urgent shipping options to keep your operations running smoothly.


            Need it now? Count on Moore Automated for fast, dependable emergency delivery backed by our unbeatable 1-year warranty.

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