{"product_id":"esb-bus-coupler-module-sec402-51-s1-yokogawa","title":"ESB Bus Coupler Module SEC402-51 S1 Yokogawa","description":"\u003ch2\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSEC402-51 S1\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ehigh-integrity ESB Bus Coupler Module\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eengineered for the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eYokogawa ProSafe-RS Safety Instrumented System (SIS)\u003c\/strong\u003e. It serves as a critical communication bridge between\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSafety Control Units (SCU)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSafety Node Units (SNU)\u003c\/strong\u003e, providing\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003edual-channel redundancy\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eto ensure continuous data transfer in SIL3-rated safety loops.\u003c\/p\u003e\n\u003cp\u003eThe \"51\" suffix denotes a specialized hardware configuration optimized for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003emission-critical safety applications\u003c\/strong\u003e, delivering high-speed, reliable communication over the ESB bus. Compact and lightweight, the SEC402-51 S1 is ideal for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ehigh-density safety racks\u003c\/strong\u003e, enabling robust communication in hazardous and industrial environments.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel Number\u003c\/td\u003e\n\u003ctd\u003eSEC402-51 S1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eESB Bus Coupler (Safety-rated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannels\u003c\/td\u003e\n\u003ctd\u003e2 (Redundant communication)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBus Interface\u003c\/td\u003e\n\u003ctd\u003eESB Bus for ProSafe-RS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Speed\u003c\/td\u003e\n\u003ctd\u003e1 Mbps (optimized for safety)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Rating\u003c\/td\u003e\n\u003ctd\u003eSIL3 (IEC 61508)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eSingle-slot installation in SCU\/SNU racks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003eBackplane powered\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0–60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e3.2 cm x 10.6 cm x 13 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.34 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cstrong\u003eApplication Scenarios\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eConnecting\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003emultiple safety I\/O nodes\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eto a central ProSafe-RS controller\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEnsuring\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eredundant communication paths\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor emergency shutdown (ESD), Fire \u0026amp; Gas (F\u0026amp;G), and Burner Management Systems (BMS)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUsed in\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ehigh-risk industries\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003esuch as LNG processing, offshore drilling, and petrochemical plants\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIdeal for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003edistributed safety architectures\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewhere node redundancy is essential\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: What is the difference between SEC401 and SEC402 modules?\u003c\/strong\u003e\u003cbr\u003eA: The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSEC401\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis typically installed in upstream Safety Control Units to initiate ESB bus extension, while the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSEC402\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis installed in downstream Node Units to receive and relay safety signals. Together, they maintain a redundant, SIL3-rated communication path.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ2: Does this module support G3 conformal coating?\u003c\/strong\u003e\u003cbr\u003eA: The S1 revision provides standard industrial protection. For environments with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ehighly corrosive gases\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(e.g., H₂S, SO₂), verify whether a dedicated\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eG3-rated version\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis required to ensure long-term reliability.\u003c\/p\u003e","brand":"YOKOGAWA","offers":[{"title":"Default Title","offer_id":51708256321848,"sku":"SEC402-51 S1","price":188.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0893\/1616\/3896\/files\/SEC402-51_S11.jpg?v=1770256782","url":"https:\/\/www.automodulexpert.com\/products\/esb-bus-coupler-module-sec402-51-s1-yokogawa","provider":"AutoModuleXpert Ltd.","version":"1.0","type":"link"}