{"product_id":"yokogawa-alf111-s50-foundation-fieldbus-communication-module","title":"Yokogawa ALF111-S50 Foundation Fieldbus Communication Module","description":"\u003cp\u003eThe \u003cstrong\u003eYokogawa ALF111-S50\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eALF111\u003c\/strong\u003e Foundation Fieldbus Communication Module, operates as a dedicated hardware component for Foundation Fieldbus (H1) data exchange within field control stations (FCS).\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\u003eALF111-S50\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\u003e0.4 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e260 mm x 180 mm x 60 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 (Standard industrial range)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e0.5 A or less\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBus Connection\u003c\/td\u003e\n\u003ctd\u003ePressure clamp terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFieldbus Interface\u003c\/td\u003e\n\u003ctd\u003eFoundation Fieldbus (H1), 31.25 kbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eI\/O Capacity\u003c\/td\u003e\n\u003ctd\u003e48 points per segment \/ 32 devices per segment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFOUNDATION Fieldbus Connectivity and Signal Isolation\u003c\/h3\u003e\n\u003cp\u003eThe ALF111-S50 serves as the primary gateway for FOUNDATION Fieldbus protocol communication, executing Link Active Scheduler (LAS) and Clock Master functions to manage bus traffic. To maintain electrical integrity, the module provides a withstanding voltage of 1500 V AC between field and system interfaces, as well as between individual channels. This galvanic isolation is required to prevent ground loops and common-mode noise propagation from fieldbus segments into the control station backplane.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the ALF111-S50 support dual-redundant deployment within a single node?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the architecture allows for dual-redundancy by installing two modules in the same node, ensuring seamless failover capability if the primary communication path is interrupted.\u003c\/p\u003e\n\u003cp\u003eQ: Are there specific termination requirements for the fieldbus segment?\u003c\/p\u003e\n\u003cp\u003eA: The module features built-in terminators integrated directly into the pressure clamp terminals, eliminating the requirement for external termination components on the bus segment.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eVerify that the control rack is de-energized before mounting the module to prevent electrical damage to the backplane communication pins.\u003c\/li\u003e\n\u003cli\u003eRoute fieldbus cabling through designated noise-suppression conduits to prevent electromagnetic interference from high-voltage AC lines.\u003c\/li\u003e\n\u003cli\u003eEnsure wire insertion into pressure clamp terminals is firm; verify that no stray strands are exposed to prevent shorts across the H1 bus.\u003c\/li\u003e\n\u003cli\u003eIf implementing dual redundancy, ensure both modules are configured with identical network addresses and firmware versions to avoid synchronization conflicts during runtime.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":48701582377150,"sku":"ALF111-S50","price":3000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/screenshot_2026-08-12_11-02-57_bdc1bfe8-c7d4-4097-89b1-2ea439ac5236.png?v=1786503914","url":"https:\/\/www.autooiltech.com\/es\/products\/yokogawa-alf111-s50-foundation-fieldbus-communication-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}