{"product_id":"alf111-s00-s1-yokogawa-fieldbus-communication-module","title":"ALF111-S00 S1 YOKOGAWA Fieldbus Communication Module","description":"\u003ch2\u003eYOKOGAWA ALF111-S00 S1 FOUNDATION Fieldbus Communication Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYOKOGAWA ALF111-S00 S1\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eALF111-S00\u003c\/strong\u003e FOUNDATION Fieldbus Communication Module, operates as a dedicated hardware component for deterministic digital fieldbus data exchange within CENTUM VP and CS 3000 Field Control Station (FCS) architectures. Mounted on compatible node units such as ANB10, ANB11, AFV30, AFV40, A2FV50, or A2FV70, the module interfaces host control software directly with field instruments operating on the H1 physical layer.\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-S00 S1\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\u003e0.3 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e12.7 cm x 2.5 cm x 12.7 cm\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\u003eCurrent consumption 0.5 A or less\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Interface\u003c\/td\u003e\n\u003ctd\u003eFOUNDATION Fieldbus H1 (low-speed voltage mode), 4 ports (1 segment per port)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Speed\u003c\/td\u003e\n\u003ctd\u003e31.25 kbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e1500 V AC per minute (field-to-system)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Device Capacity\u003c\/td\u003e\n\u003ctd\u003eUp to 32 units per segment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl I\/O Capacity\u003c\/td\u003e\n\u003ctd\u003eUp to 48 points 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 H1 Network Integration\u003c\/h3\u003e\n\u003cp\u003eThe hardware manages up to 4 independent fieldbus H1 segments, running at a deterministic transmission speed of 31.25 kbps. The module supports Link Active Scheduler (LAS) functionality and acts as a network clock master to execute scheduled cyclic transfers alongside acyclic field communications. Built-in bus terminators on each segment preserve signal wave shapes across fieldbus lines terminated via pressure clamp removable terminal blocks. Additionally, dual-redundant pair configurations inside a single node allow instant failover without dropping active H1 communications or disrupting cyclic schedule timing.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the module maintain scheduled communications during a host controller failover?\u003c\/p\u003e\n\u003cp\u003eA: The onboard Link Active Scheduler (LAS) maintains the communication schedule across active H1 segments independently of the host controller processor, securing deterministic field loop updates.\u003c\/p\u003e\n\u003cp\u003eQ: What physical segment termination is required when installing the module?\u003c\/p\u003e\n\u003cp\u003eA: The module features built-in H1 segment terminators accessed via the pressure clamp terminal block assembly, eliminating the need for external bus termination resistors at the module interface.\u003c\/p\u003e\n\u003cp\u003eQ: Does the unit support dual-redundant mounting configurations within the node chassis?\u003c\/p\u003e\n\u003cp\u003eA: Two identical units installed in designated slot pairs provide full dual-redundant communication links across all 4 segments without interrupting field device data exchange.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVerify that node backplane power remains turned off before inserting or unseating the module from ANB10\/ANB11 or AFV chassis slots.\u003c\/li\u003e\n\u003cli\u003eConnect segment signal lines using dedicated shielded twisted-pair cables designed specifically for 31.25 kbps H1 physical layer specifications.\u003c\/li\u003e\n\u003cli\u003eGround cable shields at a single point on the local grounding bar to prevent stray ground currents from inducing noise on the fieldbus segments.\u003c\/li\u003e\n\u003cli\u003eEnsure pressure clamp terminal screws are torqued to specified field wiring standards to maintain consistent low-resistance electrical connections.\u003c\/li\u003e\n\u003cli\u003eConfirm that built-in segment terminators match local topology requirements before commissioning active fieldbus segments.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43914008068186,"sku":"ALF111-S00 S1","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/89._c45e896f-f0b4-429b-81c9-a33d6c90e0a9.jpg?v=1787728082","url":"https:\/\/www.spareoil.com\/products\/alf111-s00-s1-yokogawa-fieldbus-communication-module","provider":"SpareOil Automation","version":"1.0","type":"link"}