{"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 deterministic fieldbus signal processing and network integration within CENTUM VP DCS platforms.\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\u003e1.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard CENTUM VP card slot dimensions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 50 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e5 VDC, 0.5 A (Backplane supply)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eFOUNDATION Fieldbus Communication Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuffix Code (-S)\u003c\/td\u003e\n\u003ctd\u003eStandard Type\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuffix Code (5)\u003c\/td\u003e\n\u003ctd\u003eWith no explosion protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuffix Code (0)\u003c\/td\u003e\n\u003ctd\u003eBasic type\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReplacement Target\u003c\/td\u003e\n\u003ctd\u003eDirect functional replacement for ALF111-S00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFOUNDATION Fieldbus Protocol and Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe module executes direct H1 fieldbus protocol decoding across four independent channels, maintaining galvanically isolated signal paths to prevent ground loops between field instruments and the internal DCS backplane. Cold junction processing and loop power supply management conform strictly to H1 physical layer specifications (31.25 kbit\/s transmission rate). Embedded channel-to-channel isolation safeguards signal integrity against transient voltage surges and electromagnetic interference common in industrial process loops.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the ALF111-S50 differ from the older ALF111-S00 module?\u003c\/p\u003e\n\u003cp\u003eA: The ALF111-S50 serves as the direct functional replacement for the ALF111-S00. It retains full backplane pinout and protocol compatibility while updating internal component revisions to match current manufacturing standards.\u003c\/p\u003e\n\u003cp\u003eQ: Is online module replacement (hot-swapping) supported during DCS operation?\u003c\/p\u003e\n\u003cp\u003eA: Yes, hot-swapping is supported when installed in redundant pair configurations on the field control station (FCS) baseplate, provided standard ESD prevention procedures are followed during removal and insertion.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eEnsure the Field Control Station (FCS) backplane slot is free of dust and debris before module insertion.\u003c\/li\u003e\n\u003cli\u003eAlign the card edge guide rails carefully with the node unit slot and push firmly until the locking levers engage fully.\u003c\/li\u003e\n\u003cli\u003eGround all fieldbus cable shielding at a single point (typically at the field terminal board or barrier) to eliminate circulating shield currents.\u003c\/li\u003e\n\u003cli\u003eVerify that fieldbus H1 segment terminators are correctly placed at both physical ends of each 31.25 kbit\/s fieldbus trunk.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":45368430395507,"sku":"ALF111-S50","price":233.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/ALF111-S50.png?v=1786946045","url":"https:\/\/www.dcssupplier.com\/products\/yokogawa-alf111-s50-foundation-fieldbus-communication-module","provider":"DcsSupplier Limited","version":"1.0","type":"link"}