{"product_id":"yokogawa-alf111-s01-foundation-fieldbus-communication-module","title":"Yokogawa ALF111-S01 FOUNDATION Fieldbus Communication Module","description":"\u003ch2\u003eYokogawa ALF111-S01 FOUNDATION Fieldbus Communication Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for deterministic cyclic data exchange in CENTUM VP and CENTUM CS 3000 distributed control systems, the \u003cstrong\u003eYokogawa ALF111-S01\u003c\/strong\u003e (base model \u003cstrong\u003eALF111\u003c\/strong\u003e) provides direct physical-layer interfacing to FOUNDATION Fieldbus H1 segments at 31.25 kbit\/s, executing scheduled link-active communication without supervisory intervention.\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-S01\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\u003e340 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e88 x 58 x 23 mm (W x H x D)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 50 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e4.5 W max (24 VDC ±10%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Speed\u003c\/td\u003e\n\u003ctd\u003e31.25 kbit\/s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of H1 Ports\u003c\/td\u003e\n\u003ctd\u003e4 segments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Devices per Port\u003c\/td\u003e\n\u003ctd\u003e32 (practical limit ~12–16)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Segment Length\u003c\/td\u003e\n\u003ctd\u003e1900 m (Type A cable, no repeaters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFOUNDATION Fieldbus Protocol Integration\u003c\/h3\u003e\n\u003cp\u003eThe module supports 4-20 mA HART loop protocol overlay on FOUNDATION Fieldbus segments, enabling simultaneous analog signaling and digital data transfer. Channel-to-channel isolation prevents crosstalk between segments, while cold junction compensation maintains accurate temperature referencing for connected instrumentation. The deterministic schedule ensures bounded message latency under full process load.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the ALF111-S01 support hot-swapping in an operational node unit?\u003c\/p\u003e\n\u003cp\u003eA: No. Removal or insertion must occur only after powering down the associated node unit to prevent backplane transients.\u003c\/p\u003e\n\u003cp\u003eQ: What is the redundancy behavior during dual-module operation?\u003c\/p\u003e\n\u003cp\u003eA: In redundant configuration, the standby module assumes communication within one scheduled macrocycle following active module failure.\u003c\/p\u003e\n\u003cp\u003eQ: Are firmware updates backward-compatible with older CENTUM CS 3000 revisions?\u003c\/p\u003e\n\u003cp\u003eA: Firmware compatibility depends strictly on the installed system revision; consult the Yokogawa engineering manual before upgrading.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the ALF111-S01 in designated ESB\/ER bus node unit slots using correct torque on securing screws. Use shielded Type A fieldbus cable with shield drain wires terminated at the host end only. Maintain minimum separation of 30 cm from high-voltage power wiring to reduce electromagnetic interference. Install fieldbus terminators at both ends of each segment and verify termination resistance before energizing the network.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":44209057333336,"sku":"ALF111-S01","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/ALF111-S01-3.jpg?v=1780974355","url":"https:\/\/www.industriaxplc.com\/products\/yokogawa-alf111-s01-foundation-fieldbus-communication-module","provider":"IndustriaX Limited","version":"1.0","type":"link"}