{"product_id":"yokogawa-alf111-s50-foundation-fieldbus-communication-module","title":"Yokogawa ALF111-S50 FOUNDATION Fieldbus Communication Module","description":"\u003ch2\u003eYokogawa ALF111-S50 FOUNDATION Fieldbus Communication Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for FOUNDATION Fieldbus H1 communication in Yokogawa CENTUM VP, CENTUM CS 3000, and ProSafe-RS platforms, the \u003cstrong\u003eYokogawa ALF111-S50\u003c\/strong\u003e (\u003cstrong\u003eALF111\u003c\/strong\u003e FOUNDATION Fieldbus Communication Module) provides four independent H1 communication ports for digital signal exchange between Field Control Stations and field devices.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cfigure\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eCode\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eALF111\u003c\/td\u003e\n\u003ctd\u003eFOUNDATION Fieldbus Communication Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e-S\u003c\/td\u003e\n\u003ctd\u003eStandard type\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eNo explosion protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e0\u003c\/td\u003e\n\u003ctd\u003eBasic type\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eALF111-S50\u003c\/td\u003e\n\u003ctd\u003eComplete model designation\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\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\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\u003eNot specified in supplied data\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eFOUNDATION Fieldbus Communication Module (FF-H1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface \/ Protocol\u003c\/td\u003e\n\u003ctd\u003eFOUNDATION Fieldbus H1, Low-Speed Voltage Mode\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBaud Rate\u003c\/td\u003e\n\u003ctd\u003e31.25 kbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Ports\u003c\/td\u003e\n\u003ctd\u003e4 independent H1 ports \/ segments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnected Devices\u003c\/td\u003e\n\u003ctd\u003eUp to 32 devices per segment, subject to system configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax I\/O Points\u003c\/td\u003e\n\u003ctd\u003eUp to 48 points per segment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Consumption\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;= 0.5 A at 5 VDC supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;= 2.5 W, based on 5 VDC and \u0026lt;= 0.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWithstanding Voltage\u003c\/td\u003e\n\u003ctd\u003e1,500 VAC for 1 minute, field-to-system isolation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection Terminal\u003c\/td\u003e\n\u003ctd\u003ePressure Clamp Terminal Block, such as NFTF9S, or cable to terminal board such as AKB336\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.40 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e32.8 x 130.0 x 127.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFOUNDATION Fieldbus H1 Communication\u003c\/h3\u003e\n\u003cp\u003eThe ALF111-S50 provides four independent FOUNDATION Fieldbus H1 segments operating at 31.25 kbps. Each segment supports digital communication with field devices including smart transmitters, control valves, and flowmeters. The module can operate as a Link Master and Link Active Scheduler (LAS), providing scheduled communication control on the H1 segment.\u003c\/p\u003e\n\u003cp\u003eThe module also supports Clock Master functionality for time synchronization of connected fieldbus devices. Dual-redundant pairing is supported using adjacent node slots, allowing the secondary module to assume communication operation when the primary module fails.\u003c\/p\u003e\n\u003cp\u003eField-to-system isolation is specified at 1,500 VAC for 1 minute. The supplied data does not specify individual channel-to-channel isolation characteristics.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the communication rate of the ALF111-S50?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The FOUNDATION Fieldbus H1 interface operates at 31.25 kbps.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How many H1 segments are provided by one ALF111-S50 module?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The module provides four independent H1 communication ports or segments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the specified module power requirement?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Current consumption is specified as no more than 0.5 A from a 5 VDC supply, corresponding to no more than 2.5 W when calculated from the stated maximum current.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInstall the module in the designated Yokogawa system node and use the specified connection terminal or terminal-board interface.\u003c\/li\u003e\n\u003cli\u003eVerify the module orientation and mechanical seating before energizing the system.\u003c\/li\u003e\n\u003cli\u003eUse the designated FOUNDATION Fieldbus H1 wiring topology and maintain appropriate separation from high-voltage and high-current conductors.\u003c\/li\u003e\n\u003cli\u003eTerminate cable shields according to the project grounding design and Yokogawa system installation requirements.\u003c\/li\u003e\n\u003cli\u003eVerify field-to-system isolation requirements before connecting field wiring.\u003c\/li\u003e\n\u003cli\u003eFor redundant configurations, install the paired modules in the specified adjacent node positions.\u003c\/li\u003e\n\u003cli\u003eConfirm segment device count, I\/O allocation, and network configuration against the actual CENTUM VP, CENTUM CS 3000, or ProSafe-RS configuration.\u003c\/li\u003e\n\u003cli\u003eDo not assume an operating-temperature rating or channel-to-channel isolation value where it is not stated in the supplied technical data.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43671835181123,"sku":"ALF111-S50","price":234.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/5810\/3107\/files\/ALF111-S01_2.jpg?v=1741327578","url":"https:\/\/www.plcdcspro.com\/th\/products\/yokogawa-alf111-s50-foundation-fieldbus-communication-module","provider":"PLC DCS Pro Ltd.","version":"1.0","type":"link"}