{"product_id":"alf111-s00-yokogawa-centum-vp-foundation-fieldbus-h1-module","title":"ALF111-S00 Yokogawa CENTUM VP FOUNDATION Fieldbus H1 Module","description":"\u003ch2\u003eYokogawa ALF111-S00 FOUNDATION Fieldbus Communication Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for high-speed network integration in industrial automation environments, the \u003cstrong\u003eYokogawa ALF111-S00\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eALF111\u003c\/strong\u003e FOUNDATION Fieldbus Communication Module, provides direct physical\/electrical execution between field control stations and intelligent field instruments. The hardware acts as a dedicated deterministic link interface, establishing simultaneous connectivity across physical segments without intermediate gateways.\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\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\u003e0.40 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 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eMax 0.5 A at 5 VDC (from backplane)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface Type\u003c\/td\u003e\n\u003ctd\u003eFOUNDATION Fieldbus H1 (low-speed voltage mode)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Ports\u003c\/td\u003e\n\u003ctd\u003e4 channels (1 independent segment per port)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Rate\u003c\/td\u003e\n\u003ctd\u003e31.25 kbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDevice Capacity\u003c\/td\u003e\n\u003ctd\u003eMax 32 units per segment (including module)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl I\/O Channels\u003c\/td\u003e\n\u003ctd\u003eUp to 48 points per segment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical Isolation\u003c\/td\u003e\n\u003ctd\u003e1500 VAC (field-to-system, channel-to-channel, 1 min)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTermination\u003c\/td\u003e\n\u003ctd\u003eInternal, software-switchable fieldbus terminators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProcess Control \u0026amp; Distributed Network Topology\u003c\/h3\u003e\n\u003cp\u003eThe module executes direct digital physical layer management across four independent H1 segments. It enforces the Link Active Scheduler (LAS) function to maintain synchronous, time-critical network control, acting as the centralized clock master for connected transmitters and valve positioners. By operating directly on the system backplane of Field Control Units (AFV30, AFV40, AFF50, A2FV50, A2FV70) or bus node units (ANB10, ANB11, ANR10), it processes cyclic data transfers via the FOUNDATION Fieldbus protocol. Channel-to-channel galvanic isolation prevents ground loop interference from skewing differential voltage modes across adjacent segments, preserving signal integrity under severe electromagnetic variations.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the module require dedicated external hardware terminators for each connected H1 segment?\u003c\/p\u003e\n\u003cp\u003eA: No. The hardware contains internal, switchable terminators built directly into the circuitry. These can be enabled or disabled via system configuration, removing the need for external resistor-capacitor networks at the module side of the segment.\u003c\/p\u003e\n\u003cp\u003eQ: What are the restrictions regarding hot-swapping the module during active control operations?\u003c\/p\u003e\n\u003cp\u003eA: Online replacement is supported only when the module is deployed in a dual-redundant configuration slot pair. Removing a single, non-redundant module causes immediate termination of the Link Active Scheduler (LAS) on all four segments, leading to a loss of cyclic data communication with the connected field instruments.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBus Segment Wiring:\u003c\/strong\u003e Secure all field cables to the removable pressure clamp terminal block. Ensure that total cable length per segment does not exceed 1900 meters for Type A shielded twisted-pair wire.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShield Grounding:\u003c\/strong\u003e Connect the fieldbus cable shield to a single, dedicated instrument ground point at the control cabinet side. Terminate the shield cleanly to prevent stray noise injection, and ensure the shield remains completely isolated at the field device end.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Seating:\u003c\/strong\u003e Power down the node slot if installing a non-redundant unit. Insert the module firmly into the designated slot on the AFV or ANB backplane until the locking mechanisms click, preventing intermittent communication faults caused by physical vibration.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43667583369306,"sku":"ALF111-S00","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/570..jpg?v=1784251447","url":"https:\/\/www.spareoil.com\/ar\/products\/alf111-s00-yokogawa-centum-vp-foundation-fieldbus-h1-module","provider":"SpareOil Automation","version":"1.0","type":"link"}