{"product_id":"yokogawa-alf111-s51-fieldbus-comms-module-take-out-no-factory-box-dhl-ship","title":"YOKOGAWA ALF111-S51 FIELDBUS COMMS MODULE","description":"\u003ch3 data-section-id=\"1vt381m\" data-start=\"0\" data-end=\"22\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"4\" data-end=\"20\"\u003eDescription:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-start=\"23\" data-end=\"501\"\u003eThe Yokogawa ALF111-S51 FOUNDATION \u003ca href=\"https:\/\/plgautomation.com\/collections\/plcs-more\"\u003eFieldbus Communication Module\u003c\/a\u003e is used in distributed control systems for communication between controllers and field devices. Commonly installed in Yokogawa CENTUM DCS node units and field control stations for fieldbus network integration. Maintenance teams and system integrators use this part for enabling fieldbus communication, replacing failed communication modules, or maintaining reliable data exchange in process control systems.\u003c\/p\u003e\n\u003ch3 data-section-id=\"10m4hth\" data-start=\"503\" data-end=\"526\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"507\" data-end=\"524\"\u003eApplications:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-start=\"527\" data-end=\"1047\"\u003eThe Yokogawa ALF111-S51 is commonly used in industrial process control environments where FOUNDATION Fieldbus communication is required. It is frequently applied in oil \u0026amp; gas, chemical plants, power generation, and manufacturing systems to connect field instruments such as transmitters and valve positioners to the control system. The module functions as a Link Active Scheduler (LAS), coordinating communication timing and ensuring stable data exchange across fieldbus segments. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"12f0hz5\" data-start=\"1049\" data-end=\"1084\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1053\" data-end=\"1082\"\u003eTechnical Specifications:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1085\" data-end=\"2234\"\u003e• Manufacturer: Yokogawa\u003cbr data-start=\"1109\" data-end=\"1112\"\u003e• Model \/ Part Number: ALF111-S51\u003cbr data-start=\"1145\" data-end=\"1148\"\u003e• Product Type: FOUNDATION Fieldbus Communication Module\u003cbr data-start=\"1204\" data-end=\"1207\"\u003e• Protocol: FOUNDATION Fieldbus H1 (low-speed voltage mode) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1304\" data-end=\"1307\"\u003e• Ports: 4 ports (1 segment per port) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1382\" data-end=\"1385\"\u003e• Transmission Speed: 31.25 kbps \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1455\" data-end=\"1458\"\u003e• Function: Link Active Scheduler (LAS) for fieldbus communication \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1562\" data-end=\"1565\"\u003e• Installation: Mounted on node units (ANB10\/ANB11, AFV, A2FV series) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1672\" data-end=\"1675\"\u003e• Max Devices per Segment: Up to 32 devices (typical FF limit) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1775\" data-end=\"1778\"\u003e• Max I\/O per Segment: Up to 48 points \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1854\" data-end=\"1857\"\u003e• Withstanding Voltage: 1500 VAC (field-to-system) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1945\" data-end=\"1948\"\u003e• Weight: Approx. 0.4 kg \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"2010\" data-end=\"2013\"\u003e• Functionality: Data exchange between FCS and field devices (transmitters, valves) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"2136\" data-end=\"2139\"\u003e• Configuration: Supports redundant DCS architectures \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"uqv3ss\" data-start=\"2236\" data-end=\"2266\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"2240\" data-end=\"2264\"\u003eCommon Replacements:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2267\" data-end=\"2409\"\u003e• Yokogawa ALF111-S50 FOUNDATION Fieldbus Module\u003cbr data-start=\"2315\" data-end=\"2318\"\u003e• Yokogawa NFLF111 Fieldbus Communication Module\u003cbr data-start=\"2366\" data-end=\"2369\"\u003e• Yokogawa \u003ca href=\"https:\/\/plgautomation.com\/products\/yokogawa-aip502?_pos=1\u0026amp;_sid=b97742fff\u0026amp;_ss=r\"\u003eAIP502\u003c\/a\u003e Communication Module\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"New","offer_id":51734675390766,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_f9b5db7a-22aa-42f9-a396-764ea115fa06.jpg?v=1770606892","url":"https:\/\/plgautomation.com\/products\/yokogawa-alf111-s51-fieldbus-comms-module-take-out-no-factory-box-dhl-ship","provider":"PLG Automation ","version":"1.0","type":"link"}