{"product_id":"mif4-a-yokogawa-foundation-fieldbus-h1-module","title":"MIF4*A | Yokogawa FOUNDATION Fieldbus H1 Module","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa MIF4*A\u003c\/strong\u003e is a \u003cstrong\u003eFOUNDATION Fieldbus H1 communication module\u003c\/strong\u003e designed for Yokogawa Field Control Unit (FCU) platforms. It manages \u003cstrong\u003e4 H1 fieldbus segments\u003c\/strong\u003e at \u003cstrong\u003e31.25 kbps\u003c\/strong\u003e, serving as the Link Active Scheduler (LAS) and system clock master for up to \u003cstrong\u003e32 field devices per segment\u003c\/strong\u003e. The module provides deterministic communication between smart transmitters, valve positioners, and the central controller across multiple active fieldbus loops.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Family:\u003c\/strong\u003e Yokogawa FCU Communication Module\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtocol:\u003c\/strong\u003e FOUNDATION Fieldbus H1 (low-speed voltage mode)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePorts:\u003c\/strong\u003e 4 ports (1 segment per port)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransmission Speed:\u003c\/strong\u003e 31.25 kbps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Devices per Segment:\u003c\/strong\u003e 32 units (including the MIF4*A)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIsolation:\u003c\/strong\u003e 1500 V AC (field-to-system, channel-to-channel, 1 min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Consumption:\u003c\/strong\u003e Max 2.5 W (5 V DC, ≤0.5 A)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBus Connection:\u003c\/strong\u003e Removable pressure clamp terminal block\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Terminators:\u003c\/strong\u003e Switchable onboard terminators\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e 0°C to +60°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.40 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFeatures and Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e4-port design supports up to 4 independent H1 fieldbus segments from one module\u003c\/li\u003e\n\u003cli\u003eLink Active Scheduler (LAS) role ensures deterministic loop synchronization\u003c\/li\u003e\n\u003cli\u003eChannel-to-channel isolation rated at 1500 V AC protects against ground loops\u003c\/li\u003e\n\u003cli\u003eSwitchable internal terminators eliminate need for external termination on short runs\u003c\/li\u003e\n\u003cli\u003eRemovable pressure clamp terminal blocks enable fast field wiring maintenance\u003c\/li\u003e\n\u003cli\u003eDual-redundant module pairing provides seamless LAS failover without segment disruption\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFOUNDATION Fieldbus H1 device integration in CENTUM VP\/CS3000\u003c\/li\u003e\n\u003cli\u003eSmart transmitter and valve positioner network management\u003c\/li\u003e\n\u003cli\u003eProcess control loops requiring deterministic fieldbus communication\u003c\/li\u003e\n\u003cli\u003eChemical plant distributed I\/O via fieldbus\u003c\/li\u003e\n\u003cli\u003eOil refinery instrument modernization projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What does the suffix *A indicate on the MIF4 module?\u003c\/strong\u003e\u003cbr\u003eA: The suffix letter denotes the hardware revision level. MIF4*A is Revision A. Verify compatibility with your specific FCU and CENTUM system version before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How many field devices can each H1 segment support?\u003c\/strong\u003e\u003cbr\u003eA\u0026gt; Each segment supports up to 32 devices including the MIF4*A module itself.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the module include internal terminators?\u003c\/strong\u003e\u003cbr\u003eA: Yes. The module features switchable internal terminators. Enable the terminator if the MIF4*A is at the physical end of the H1 trunk line; disable if an external terminator exists.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What happens during a dual-redundant module failure?\u003c\/strong\u003e\u003cbr\u003eA: In a dual-redundant pair, the primary module operates as the active LAS. If the primary fails, the backup module takes over the LAS token seamlessly without disrupting segment traffic.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eSlide the module into the designated FCU rack slot along the guide rails\u003c\/li\u003e\n\u003cli\u003ePush firmly until the rear pins connect with the system backplane\u003c\/li\u003e\n\u003cli\u003eEngage the locking clips to secure against industrial vibration\u003c\/li\u003e\n\u003cli\u003eVerify the position of the built-in terminator switch before activating the field loop\u003c\/li\u003e\n\u003cli\u003eEnable internal terminator if the module is at the end of the H1 trunk\u003c\/li\u003e\n\u003cli\u003eConnect fieldbus cables to the removable pressure clamp terminal blocks\u003c\/li\u003e\n\u003cli\u003eTerminate all cable shields at a single point on the instrument ground bar\u003c\/li\u003e\n\u003cli\u003eConfigure segment parameters in the CENTUM engineering station\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSelection Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSelect MIF4*A for FOUNDATION Fieldbus H1 communication in Yokogawa FCUs\u003c\/li\u003e\n\u003cli\u003eVerify your FCU rack has available slots for communication modules\u003c\/li\u003e\n\u003cli\u003ePlan H1 segment topology to stay within the 32-device limit per port\u003c\/li\u003e\n\u003cli\u003eFor redundant configurations, order two MIF4*A modules\u003c\/li\u003e\n\u003cli\u003eEnsure fieldbus cables have compatible pressure clamp termination\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":54012359540920,"sku":"MIF4*A","price":174.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/MIF4A_3__1r270_eb1394ed-bc58-40f0-a558-ad98fd5cf6ef.png?v=1788157162","url":"https:\/\/www.globalpetroparts.com\/products\/mif4-a-yokogawa-foundation-fieldbus-h1-module","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}