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        EC401-10 S2

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        The Yokogawa EC401-10 S2 is an ESB Bus Coupler Module designed to connect Field Control Units (FCU) to Node Units via the ESB bus in Yokogawa CENTUM VP DCS systems.
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
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        Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
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        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
        How to order
        We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online. If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.

        Technical specifications for EC401-10 S2

        • Manufacturer:
          Yokogawa
        • Part Number:
          EC401-10 S2
        • Product Family:
          Centum CS-Centum VP
        • Product Type:
          Bus Coupler Module
        • Stock:
          3
        • Transmission Speed:
          128 Mbps (I/O module data)
        • Max Connectable Units:
          9 (ANB10S/D, ANT401/411/421)
        • Transmission Distance:
          Max. 10 meters
        • Current Consumption:
          0.5 A
        • Installation Slots:
          Slot 7 (single) or Slots 7 and 8 (dual-redundant)
        • Style Requirement:
          S3 or later for CP471; Style 2 or later for SEM
        • Suffix Options:
          -5 (Standard), -E (Explosion protection), -1 (ISA G3)
        • Weight:
          0.2 kg
        • Estimated shipping dimensions:
          3.2x12.8x13cm
        • Tariff Code:
          8517795000
        • Country of origin:
          Japan
        • Place of shipment:
          Xiamen, Fujian, China
        By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

        More Information

        Overview Manuals Specifications Application Diagnostic & Protection Upgrade Procedures

        Features:

        • Provides fast ESB bus data transmission for I/O module communication.
        • Enables high availability with two modules in slots 7 and 8.
        • Supports multiple FCU models and up to 9 node units per coupler.
        The EC401-10 S2 provides high-speed ESB bus communication at 128 Mbps between the Field Control Unit (FCU) and connected Node Units. This high data transfer rate ensures rapid I/O module data transmission for real-time process control applications. The EC401-10 S2 supports connection of up to 9 units including ANB10S/D, ANT401, ANT411, and ANT421, with a maximum transmission distance of 10 meters.

        The EC401-10 S2 supports both single and dual-redundant configurations to meet varying system reliability requirements. For non-redundant ESB bus, the EC401-10 S2 is installed in slot 7 with the 8th slot covered by a dummy module. For critical applications requiring maximum uptime, two EC401-10 S2 modules can be installed in slots 7 and 8 for dual-redundant ESB bus configuration. This redundancy ensures continued communication if one module fails, eliminating single points of failure and significantly enhancing system availability.

        The EC401-10 S2 is compatible with a wide range of Field Control Units including AFV30S/D, AFV40S/D, A2FV50S/D, and A2FV70S/D. Style code S3 or later of the EC401-10 S2 is required for combination with the CP471 processor module. For SEM (Sequence of Events Manager) use, the EC401-10 S2 should be style 2 or later. The EC401-10 S2 is available with suffix codes for standard type (-5), explosion protection (-E), and ISA Standard G3 option (-1), providing flexibility for various installation environments.

        The EC401-10 S2 YOKOGAWA Bus Coupler Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).

        YOKOGAWA EC401-10 S2 Bus Coupler Module Manuals, Datasheets, Drivers, Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD
        YOKOGAWA EC401-10 S2 Bus Coupler Module Specs

        General

        • Manufacturer YOKOGAWA
        • Model EC401-10 S2
        • Condition New Original ready stock
        • Product Family EC401-50,EC401-51,EC401-11 S2
        Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        • Central Distributed Control Hubs: Serves as the primary link connecting the core FCU (e.g., AFV30 or AFV40 chassis) to multiple downstream ANB10S/D ESB Bus Node Units.
        • High-Speed Signal Synchronization: Drives deterministic 128 Mbps real-time data loops across up to 9 remote I/O sub-racks, allowing the central processor to scan thousands of temperature, pressure, and flow tags within milliseconds.
        • Continuous Heavy Process Industries: Extensively deployed within Petrochemical plants, large-scale Oil & Gas refineries, offshore drilling grids, and automated thermal power plants where data dropping or link latencies can cause severe factory safety trippings.
        • Dual-Redundant Path Failover: When two identical EC401 modules are paired in the master slot array, they form a Dual-Redundant ESB Bus topology. The module's diagnostic layers continuously watch the transmission lines; if an electrical cable short-circuit or a master chip fault occurs on line 1, the standby module takes over the link seamlessly with zero control disruption.
        • Sequence of Events Management (SEM) Readiness: The Style 2 (S2) revision includes upgraded silicon logic that natively supports SEM for Vnet/IP architectures. This hardware feature timestamps fault sequences directly at the bus layer with millisecond precision, helping engineers trace the root cause of automated trips.
        • Line-Fault & Termination Supervision: The module interacts with the connected slave module (e.g., SB401-10) to actively monitor link signal-to-noise ratios. If an inline cable breaks or a bus terminating resistor is disconnected, it immediately flags a diagnostic alarm on the Yokogawa CENTUM Engineering HIS Station.
        • Dedicated Slotting: The EC401-10 S2 must always be installed in Slot 7 and Slot 8 of the primary Field Control Unit (such as the AFV30S/D or AFV40S/D).
        • Redundancy Allocation: For standard dual-redundant tracking, fill both slots 7 and 8. If running a single non-redundant bus, mount the single EC401 into Slot 7 and seal Slot 8 with a mandatory dummy module to preserve internal cabinet airflow and bus continuity.
        • Cabling Parameters: Hook up the master interface to remote racks using Yokogawa's dedicated YCB301 copper bus cables. The physical cable length must not exceed a maximum length of 10 meters to avoid signal attenuation over copper line paths.
        Description
        This module provides the critical communication link between the controller and I/O nodes. The EC401-10 S2 enables reliable high-speed data transmission for process control applications.The Yokogawa EC401-10 S2 features a transmission speed of 128 Mbps for I/O module data and supports connection of up to 9 units including ANB10S, ANB10D, ANT401, ANT411, and ANT421. 

        The Yokogawa EC401-10 S2 supports both single and dual-redundant configurations. For non-redundant ESB bus, the EC401-10 S2 must be installed in the 7th slot with the 8th slot covered by a dummy module. For dual-redundant configuration, the EC401-10 S2 requires installation in both 7th and 8th slots. The EC401-10 S2 is compatible with AFV30S/D, AFV40S/D, A2FV50S/D, and A2FV70S/D FCUs.

        The Yokogawa EC401-10 S2 is available with suffix codes including -5 (Standard type, no explosion protection), -E (Explosion protection), and -1 (ISA Standard G3 option). The EC401-10 S2 style code S3 or later is required for combination with CP471 processor module. For SEM (Sequence of Events Manager) use, the EC401-10 S2 should be style 2 or later. Refer to GS 33J30D10-01EN for SEM details.
        Alternative Names
        EC4O1-1O S2 EC40I-I0 S2 EC401 10 S2 EC401-11 S2 SEC401-51 S3 EC401-51 SEC401-11 S3 EC401-50
        Technical notes
        The Yokogawa EC401-10 S2 is an ESB Bus Coupler Module connecting FCU to Node Units at 128 Mbps. It supports up to 9 units with 10m distance, 0.5 A consumption. Installed in slot 7 (single) or slots 7-8 (dual-redundant). Requires style S3+ for CP471 and style 2+ for SEM.
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        FAQS

        The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
        VIEW ALL FAQS
        What is the primary function of the EC401-10 S2?
        It provides ESB bus communication between Field Control Units and Node Units at 128 Mbps for Yokogawa DCS.
        How many units can the EC401-10 S2 connect?
        The EC401-10 S2 supports connection of up to 9 units including ANB10, ANT401, ANT411, and ANT421.
        Can the EC401-10 S2 be configured redundantly?
        Yes, two EC401-10 S2 modules installed in slots 7 and 8 provide dual-redundant ESB bus configuration.
        What is the style requirement for the EC401-10 S2?
        Style S3 or later is required for CP471; Style 2 or later is required for SEM use.

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