{"product_id":"yokogawa-rb401-s4-rio-bus-module-remote-i-o-communication","title":"Yokogawa RB401-S4 RIO Bus Module Remote I\/O Communication","description":"\u003ch2\u003eYokogawa RB401 RIO Bus Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa RB401-S4\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eRB401\u003c\/strong\u003e RIO Bus Module, operates as a dedicated hardware component for remote I\/O data communication within Yokogawa DCS architectures.\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\u003eSuffix Code\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRB401\u003c\/td\u003e\n\u003ctd\u003eBase Model: RIO Bus Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\/S4\u003c\/td\u003e\n\u003ctd\u003eStyle 4 Revision\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\u003eModel\u003c\/td\u003e\n\u003ctd\u003eRB401-S4\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\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.25 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e22 mm x 124 mm x 126 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eStandard Industrial Range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eNot specified (Standard Bus Load)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Speed\u003c\/td\u003e\n\u003ctd\u003e10 Mbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Media\u003c\/td\u003e\n\u003ctd\u003e2-core optical fiber (H-PCF)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Distance\u003c\/td\u003e\n\u003ctd\u003e200 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDCS Process Control Connectivity\u003c\/h3\u003e\n\u003cp\u003eThe RB401-S4 module manages signal synchronization and data frame transmission across the Remote I\/O (RIO) network. Utilizing a star topology configuration, the module interfaces with up to 7 remote sub-units. Communication is facilitated through hard plastic clad quartz (H-PCF) optical fiber, which provides robust immunity against electromagnetic interference common in high-voltage industrial environments. The module enforces deterministic data exchange at a transmission rate of 10 Mbps, ensuring that I\/O scan cycles maintain the timing precision required for real-time process monitoring and control loops.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Are there specific installation precautions for the H-PCF fiber-optic interface?\u003c\/p\u003e\n\u003cp\u003eA: Yes, maintain the fiber-optic cables within the maximum bend radius to prevent micro-cracks in the silica core, which can increase signal attenuation. Ensure all optical connectors are cleaned with industry-standard fiber inspection scopes and solvent-free cleaning tools before insertion into the RB401 port to prevent light loss at the interface.\u003c\/p\u003e\n\u003cp\u003eQ: How does the star configuration affect network availability?\u003c\/p\u003e\n\u003cp\u003eA: In a star topology, the RB401 acts as the central hub for RIO communications. While this configuration simplifies cable routing and troubleshooting compared to daisy-chain setups, a fault in the central bus interface may impact all connected sub-units. Verify that optical power levels remain within the receiver's sensitivity threshold across all legs of the star to ensure stable data transmission.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Seat the RB401 module into the rack mount assembly. Secure the module using the integrated fastening points to prevent vibration-induced dislodgement from the backplane bus.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCabling:\u003c\/strong\u003e Route optical fiber cables through dedicated conduits to prevent mechanical stress or crushing. Label all fiber-optic connections clearly at both ends to facilitate rapid identification during network troubleshooting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrounding:\u003c\/strong\u003e Ensure the rack mount chassis is properly bonded to the cabinet ground bus. Even though the fiber-optic medium provides inherent galvanic isolation, the module housing must be grounded to dissipate static charge and maintain EMC shielding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValidation:\u003c\/strong\u003e After installation, perform a light-level audit at the termination points to verify that the attenuation does not exceed the budget allowed for the 200 m maximum distance specification.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43655596441690,"sku":"RB401","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/539._ad5c743c-bda6-446e-a9a0-00d5ce4359c7.jpg?v=1783998946","url":"https:\/\/www.spareoil.com\/ar\/products\/yokogawa-rb401-s4-rio-bus-module-remote-i-o-communication","provider":"SpareOil Automation","version":"1.0","type":"link"}