{"product_id":"yokogawa-ec401-51-centum-vp-esb-bus-coupler-module","title":"Yokogawa EC401-51 CENTUM VP ESB Bus Coupler Module","description":"\u003ch2\u003eYokogawa EC401-51 ESB Bus Coupler Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa EC401-51\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eEC401\u003c\/strong\u003e ESB Bus Coupler Module, operates as a dedicated hardware component for high-speed inter-rack communication within CENTUM VP, CS3000, and ProSafe-RS control platforms. Installed in Field Control Units (FCUs), this module provides physical and logical interfacing to link controller backplanes with remote ESB bus node units across 128 Mbps deterministic communication lines.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eCode \/ Suffix Segment\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eConfiguration Detail\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eFunctional Specification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBase Model: EC401\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eESB Bus Coupler Module\u003c\/td\u003e\n\u003ctd\u003eInter-rack communication interface for FCU and node extension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSuffix: -5\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard Type\u003c\/td\u003e\n\u003ctd\u003eStandard hardware variant with no explosion protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSuffix: 1\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEnvironmental Protection\u003c\/td\u003e\n\u003ctd\u003eFactory-treated with ISA Standard G3 conformal coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEC401-51\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYokogawa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.3 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120 mm x 25 mm x 130 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0 to +55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 V DC, 0.5 A maximum (rack backplane supplied)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTransmission Speed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e128 Mbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBus Protocol\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYokogawa proprietary ESB bus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum Distance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 10 m per ESB bus segment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSupported Node Units\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eANB10D, ANB11D, and FIO node extension units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSystem Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCENTUM VP, CENTUM CS 3000, and ProSafe-RS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRedundancy Support\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDual-redundant bus coupler configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDielectric Strength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1500 V AC for 1 minute\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInsulation Resistance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100 M ohm minimum at 500 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStorage Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-25 to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Humidity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10% to 95% RH (non-condensing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnvironmental Coating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eISA Standard G3 compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003e4-20 mA HART Loop Protocol and Channel-to-Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe EC401-51 module acts as a high-density data pipeline, transferring field variable arrays from remote node I\/O modules directly to the Field Control Unit CPU. Digital HART device variables overlaid onto field 4-20 mA current loops pass through node interface cards and cross the 128 Mbps ESB bus via the EC401-51 without data degradation. The module incorporates 1500 V AC isolation barriers between the internal backplane bus and external ESB transmission drivers. This isolation prevents field-side electrical transients and common-mode noise from propagating across extension cables to the main controller backplane, preserving signal integrity across high-density I\/O networks.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the EC401-51 module be replaced while the Field Control Unit remains powered up?\u003c\/p\u003e\n\u003cp\u003eA: Online replacement depends on system architecture. In dual-redundant configurations, engineers can hot-swap a faulty EC401-51 module while the redundant partner card maintains active ESB bus communication without interrupting control loops.\u003c\/p\u003e\n\u003cp\u003eQ: What cable type is required for inter-rack connection via the EC401-51?\u003c\/p\u003e\n\u003cp\u003eA: The module requires dedicated Yokogawa ESB bus cables engineered to match the 128 Mbps impedance specifications and maximum 10 m length restrictions per segment.\u003c\/p\u003e\n\u003cp\u003eQ: How does ISA Standard G3 compliance impact module operational life?\u003c\/p\u003e\n\u003cp\u003eA: The G3 conformal coating protects electronic trace geometries and surface-mount components from airborne corrosive gases, such as hydrogen sulfide and sulfur dioxide, in aggressive process environments.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eWhen integrating the Yokogawa EC401-51 module into a controller rack, follow these technical procedures:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003ePower down the rack or verify dual-redundant operational status before inserting the unit into its assigned FCU coupler slot.\u003c\/li\u003e\n\u003cli\u003eAlign the module edge connector with the backplane slot guides and seat the unit firmly until top and bottom retention latches lock.\u003c\/li\u003e\n\u003cli\u003eAttach designated ESB bus interface cables to the front panel connectors, tightening captive thumbscrews to secure signal contact.\u003c\/li\u003e\n\u003cli\u003eMaintain a minimum bending radius on ESB bus cables to avoid mechanical stress on internal signal conductors and shield foil.\u003c\/li\u003e\n\u003cli\u003eVerify that cable shield grounds terminate directly to the cabinet main earth bar to suppress high-frequency electromagnetic interference.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43855791915098,"sku":"EC401-51","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/37.1_3543c02b-8afc-43fb-afd6-c204c713f1f8.jpg?v=1786936321","url":"https:\/\/www.spareoil.com\/products\/yokogawa-ec401-51-centum-vp-esb-bus-coupler-module","provider":"SpareOil Automation","version":"1.0","type":"link"}