{"product_id":"yokogawa-alf111-s00-foundation-fieldbus-ff-h1-interface-module","title":"Yokogawa ALF111-S00 FOUNDATION Fieldbus FF-H1 Interface Module","description":"\u003ch2\u003eYokogawa ALF111-S00 FOUNDATION Fieldbus FF-H1 Interface Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for deterministic process data exchange in Yokogawa CENTUM VP distributed control systems, the \u003cstrong\u003eYokogawa ALF111-S00\u003c\/strong\u003e (base model \u003cstrong\u003eALF111\u003c\/strong\u003e) provides direct physical and electrical interfacing between the FCS backplane and FOUNDATION Fieldbus H1 segments at 31.25 kbps.\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\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 Brand\u003c\/td\u003e\n\u003ctd\u003eYokogawa ALF111-S00\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\u003e127 x 25 x 127 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to 70 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e1.5 W @ 24 VDC\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\u003eBus Interface\u003c\/td\u003e\n\u003ctd\u003e2-wire FOUNDATION Fieldbus H1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWithstanding Voltage\u003c\/td\u003e\n\u003ctd\u003e1500 VAC\/min (field to system)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBus Connection\u003c\/td\u003e\n\u003ctd\u003ePressure clamp terminals with removable terminal block and built-in terminators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFOUNDATION Fieldbus H1 Segment Interfacing\u003c\/h3\u003e\n\u003cp\u003eThe ALF111-S00 implements FOUNDATION Fieldbus H1 link layer scheduling via Link Active Scheduler capability. Channel operation supports cyclic process data transfer using function block execution synchronized to the macrocycle. Electrical isolation is maintained between field wiring and system backplane to prevent ground loop propagation. Cold junction compensation is not applicable; instead, bus power is supplied externally via an isolated fieldbus power conditioner meeting FF-844 standards.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is the ALF111-S00 hot-swappable?\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. The module can be replaced online without interrupting other active channels, provided redundancy is configured.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What is the maximum device load per segment?\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The theoretical limit is 32 devices; practical engineering recommendations restrict loading to 16 devices per segment to maintain voltage margin and scheduling performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Does it support redundant operation?\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. Two ALF111-S00 modules can operate in a redundant pair, with automatic switchover in case of module failure.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the ALF111-S00 directly into the designated slot of compatible Yokogawa FCS node units such as AFV30, AFV40, AFV10, or AFF50. Use only shielded twisted-pair Type A cable for H1 segments, maintaining shield continuity to the termination point. Ensure proper grounding at one end only to prevent ground loops. Verify bus polarity before energizing the segment. Install built-in terminators at both physical ends of the bus. Confirm no excessive voltage drop exists along the segment prior to commissioning.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":44209050124376,"sku":"ALF111-S00","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/ALF111-S00-3.jpg?v=1780973931","url":"https:\/\/www.industriaxplc.com\/products\/yokogawa-alf111-s00-foundation-fieldbus-ff-h1-interface-module","provider":"IndustriaX Limited","version":"1.0","type":"link"}