{"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, serves as the primary \u003cstrong\u003eALF111\u003c\/strong\u003e Communication Module utilized to execute Foundation Fieldbus H1 segment interface processing across Field Control Station (FCS) platforms.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eALF111\u003c\/strong\u003e: Base module hardware series representing Foundation Fieldbus H1 communication interface cards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e-S5\u003c\/strong\u003e: Standard functionality specification code designating dual-redundancy capability support within compatible node sub-racks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0\u003c\/strong\u003e: Standard option suffix signifying base manufacturing configuration without special conformal coating requirements.\u003c\/li\u003e\n\u003c\/ul\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 55 deg C\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\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\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e1500 V AC (field-to-system, channel-to-channel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDevice Capacity\u003c\/td\u003e\n\u003ctd\u003eMaximum 32 devices per segment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl I\/O Capacity\u003c\/td\u003e\n\u003ctd\u003eMaximum 48 points per segment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRedundancy\u003c\/td\u003e\n\u003ctd\u003eDual-module redundancy within same node\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative Humidity\u003c\/td\u003e\n\u003ctd\u003e35% to 85% RH (non-condensing)\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 Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe Yokogawa ALF111-S50 module incorporates FOUNDATION Fieldbus H1 connectivity running at a deterministic 31.25 kbps transmission rate to interface fieldbus transmitters and actuators with the central Field Control Station (FCS). Featuring 1500 V AC galvanic channel-to-channel and field-to-system isolation, the unit protects system electronics against high common-mode voltage spikes and loop ground noise. Integrated Link Active Scheduler (LAS) and Clock Master capabilities allow execution of segment timing control directly at the module layer while built-in terminators stabilize network segment impedance.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the ALF111-S50 handle module failover when deployed in a dual-redundant configuration?\u003c\/p\u003e\n\u003cp\u003eA: When two ALF111-S50 modules are mounted in adjacent slots of the same node, the secondary module mirrors system bus tables and automatically takes over fieldbus segment communication without dropping active H1 transaction frames upon primary card failure.\u003c\/p\u003e\n\u003cp\u003eQ: Are external bus terminators required when connecting field devices to the ALF111-S50 clamp terminals?\u003c\/p\u003e\n\u003cp\u003eA: Internal terminators are built into the module connection assembly, removing the need for external terminal resistors on the module side of the H1 segment.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eEnsure power to the node sub-rack is disconnected prior to inserting or removing the ALF111-S50 card.\u003c\/li\u003e\n\u003cli\u003eConnect fieldbus H1 bus wires to the pressure clamp terminals, strictly adhering to positive, negative, and shield polarity designations.\u003c\/li\u003e\n\u003cli\u003eGround cable shields at a single point on the sub-rack earth bar to prevent ground loop current generation across field segment runs.\u003c\/li\u003e\n\u003cli\u003eVerify that total connected field instruments do not exceed 32 devices or 48 control I\/O points per fieldbus segment.\u003c\/li\u003e\n\u003cli\u003eSecure all module mounting screws to guarantee consistent backplane connector pin insertion and thermal grounding path execution.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":52637752361240,"sku":"ALF111-S50","price":190.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/3483\/3688\/files\/NFAF135-S50_3_1e84ecfc-602b-4dcc-99be-5d955e1f3eed.jpg?v=1788919972","url":"https:\/\/www.innoplcsync.com\/products\/yokogawa-alf111-s50-foundation-fieldbus-communication-module","provider":"InnoPLC Sync Co., Ltd.","version":"1.0","type":"link"}