{"product_id":"yokogawa-sb401-11-s1-bus-interface-module","title":"Yokogawa SB401-11 S1 Bus Interface Module","description":"\u003cp\u003eThe \u003cstrong\u003eYokogawa SB401-11 S1\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eSB401\u003c\/strong\u003e Bus Interface Module, operates as a dedicated hardware component for high-speed deterministic inter-node bus signal transmission within CENTUM VP control station networks. It establishes the physical interface required to connect node interface units over optical or coaxial backplane extensions, routing real-time I\/O scan data without introducing packet latency or processing jitter.\u003c\/p\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\u003eModel\u003c\/td\u003e\n\u003ctd\u003eSB401-11 S1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eYokogawa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.30 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e130 mm x 30 mm x 125 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 50 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e5.0 VDC @ 0.5 A (2.5 W nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eBus Interface Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Protocol\u003c\/td\u003e\n\u003ctd\u003eESB \/ Optical ESB Bus Interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBus Topology\u003c\/td\u003e\n\u003ctd\u003eDual-redundant ring \/ daisy-chain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Isolation\u003c\/td\u003e\n\u003ctd\u003eGalvanic isolation via bus pulse transformers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eCold Junction Compensation and Channel-to-Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eEngineered for seamless integration into Yokogawa distributed architectures, the SB401-11 S1 maintains strict noise immunity across process networks where channel-to-channel isolation and precise cold junction compensation (CJC) are critical. The module incorporates high-density transformer isolation barriers to decouple bus ground planes from field-side electrical interference and 4-20 mA HART loop protocol noise. When processing thermal sensor data from field input subracks, the high-speed bus engine transfers digitized CJC reference updates across the system backplane with microsecond-level synchronization, preventing phase lag in active control loops.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the SB401-11 S1 module be hot-swapped while the DCS rack is powered?\u003c\/p\u003e\n\u003cp\u003eA: Yes. In dual-redundant bus interface configurations, the module supports online insertion and removal (hot-swapping). The redundant secondary module maintains uninterrupted bus communications while the primary module is unseated.\u003c\/p\u003e\n\u003cp\u003eQ: How is bus grounding handled on the SB401-11 S1 interface connectors?\u003c\/p\u003e\n\u003cp\u003eA: Cable shield connections integrate directly into the front-panel metal housing. Ground drain wires must connect to the enclosure functional earth (FE) bus bar using low-impedance copper straps to prevent common-mode noise propagation.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eConfirm that the target slot in the CENTUM node chassis corresponds to the configured bus coupler slot before physical installation.\u003c\/li\u003e\n\u003cli\u003eAlign the printed circuit board edges with the chassis guide rails and push the module firmly into the slot until the rear connector seats.\u003c\/li\u003e\n\u003cli\u003eTighten the top and bottom captive retaining screws to 0.5 Nm to secure mechanical grounding and lock the module in place.\u003c\/li\u003e\n\u003cli\u003eAttach the bus interconnecting cables to the front-panel ports, ensuring locking tabs click fully into position.\u003c\/li\u003e\n\u003cli\u003eVerify cabinet grounding continuity by measuring resistance between the module front chassis bracket and the central Functional Earth (FE) ground point.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":52702866964760,"sku":"SB401-11 S1","price":200.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/3483\/3688\/files\/VC401-10_2_f6de3ac4-baf2-43f9-9190-d6e11d30d1b0.jpg?v=1789718640","url":"https:\/\/www.innoplcsync.com\/products\/yokogawa-sb401-11-s1-bus-interface-module","provider":"InnoPLC Sync Co., Ltd.","version":"1.0","type":"link"}