{"product_id":"snt401-53-yokogawa-optical-esb-bus-repeater-module-prosafe-rs-interface","title":"SNT401-53 Yokogawa Optical ESB Bus Repeater Module ProSafe-RS Interface","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe Yokogawa SNT401-53 is a specialized optical communication interface designed to facilitate the long-range extension of the Enhanced Service Bus (ESB). Primarily utilized within the ProSafe-RS safety instrumented system and high-availability CENTUM environments, this module converts electrical bus signals into optical data for transmission over fiber optic media. By migrating from copper to fiber, the SNT401-53 eliminates the distance constraints of standard cabling while providing total immunity to electromagnetic interference and ground loops. It supports complex network architectures, allowing remote I\/O nodes to remain synchronized with the safety controller across expansive industrial complexes.\u003c\/p\u003e\n\u003ch3\u003ePhysical Architecture and Performance Metrics\u003c\/h3\u003e\n\u003cp\u003eThe SNT401-53 is built for extreme reliability, offering consistent performance across a wide environmental spectrum.\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCommunication Medium\u003c\/strong\u003e: Quartz Single-mode Optical Fiber\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSignal Conversion\u003c\/strong\u003e: Electrical-to-Optical ESB transport\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eNetwork Topology Compatibility\u003c\/strong\u003e: Supports Star and Chain configurations\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOperational Reach\u003c\/strong\u003e: Standard 5 km (Extends to 10 km on Vnet\/IP R1.03+ systems)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCascading Limit\u003c\/strong\u003e: Maximum of 2 stages for chain-type links\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCurrent Consumption\u003c\/strong\u003e: 0.5 A\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eThermal Endurance\u003c\/strong\u003e: Wide operating range from -20°C to +70°C\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCorrosion Protection\u003c\/strong\u003e: ISA Standard G3 compliant (Maintenance grade)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eUnit Weight\u003c\/strong\u003e: 0.3 kg (300g)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eApproximate Dimensions\u003c\/strong\u003e: 130 mm x 130 mm x 35 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eConnection Interface\u003c\/strong\u003e: LC Fiber Optic Connectors\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDeployment Scenarios and Field Utility\u003c\/h3\u003e\n\u003cp\u003eThis repeater module is essential for distributed safety and control architectures that require high-speed data integrity over significant distances.\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDistributed Safety Instrumentation\u003c\/strong\u003e: Linking remote safety I\/O nests to the main ProSafe-RS controller in large-scale oil and gas upstream facilities.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRefinery Infrastructure\u003c\/strong\u003e: Providing a stable communication backbone between distant process units where lightning protection and noise immunity are critical.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMarine and Offshore Platforms\u003c\/strong\u003e: Connecting auxiliary control stations to a centralized bridge system via fiber optics to prevent signal degradation caused by shipboard electrical noise.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHarsh Temperature Environments\u003c\/strong\u003e: Deploying control nodes in unheated or high-heat industrial zones, leveraging the module’s robust -20°C to 70°C operating rating.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the SNT401-53 provide explosion protection for hazardous zones?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: No, the SNT401-53 is a standard industrial module with ISA Standard G3 protection for corrosive gases, but it does not carry a specific explosion-proof rating. It should be installed in a suitable enclosure for such environments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the maximum distance I can achieve with a single SNT401-53 link?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Under standard conditions, the distance is 5 km. However, if integrated into a Vnet\/IP system with software version R1.03 or later, the maximum transmission distance can be extended up to 10 km.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I mix star and chain topologies in my network design?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes, the SNT401-53 is versatile and allows for both star and chain layouts to be combined within a single system architecture, provided the maximum of 2 stages in any single chain branch is not exceeded.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this module compatible with standard CENTUM VP systems?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes, it is used across the FIO (Field network I\/O) family, though it is most frequently found in ProSafe-RS safety systems for long-distance node connection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What type of fiber optic cables should be used with the SNT401-53?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: For optimal performance and to reach the specified distances, quartz single-mode optical fiber is required. Connection is typically made using LC-type connectors.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":45879191929005,"sku":"SNT401-53","price":2500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/SNT401-531.jpg?v=1775119460","url":"https:\/\/www.maxwellplc.com\/products\/snt401-53-yokogawa-optical-esb-bus-repeater-module-prosafe-rs-interface","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}