{"product_id":"yokogawa-alf111-s50-foundation-fieldbus-communication-module","title":"Yokogawa ALF111-S50 Foundation Fieldbus Communication Module","description":"\u003cp\u003eThe Yokogawa ALF111-S50 is a FOUNDATION Fieldbus communication module designed for Yokogawa N-IO\/FIO systems. It provides four fieldbus ports, with each port supporting one segment at a transmission speed of 31.25 kbps. The module supports LAS and clock master functions, dual-redundant configuration, and up to 48 control I\/O points per segment under specified scanning conditions.\u003c\/p\u003e\n\u003ch3\u003eCommunication Functions\u003c\/h3\u003e\n\u003cp\u003eThe ALF111-S50 interfaces with FOUNDATION Fieldbus devices using the low-speed voltage-mode interface. Its four independent ports support one fieldbus segment per port, allowing multiple field device networks to connect through a single communication module.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInterface: FOUNDATION Fieldbus, low-speed voltage mode\u003c\/li\u003e\n\u003cli\u003eNumber of ports: 4\u003c\/li\u003e\n\u003cli\u003eSegment allocation: 1 segment per port\u003c\/li\u003e\n\u003cli\u003eTransmission speed: 31.25 kbps\u003c\/li\u003e\n\u003cli\u003eCommunication functions: Link Active Scheduler (LAS) and clock master\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe maximum device count is 32 units per segment, including the ALF111 module itself. This limit should be considered when calculating the number of field devices connected to each segment.\u003c\/p\u003e\n\u003ch3\u003eControl I\/O Capacity\u003c\/h3\u003e\n\u003cp\u003eThe module supports a maximum of 48 control I\/O points per segment. High- and medium-speed scanning cycle requirements can be accommodated by specifying up to six I\/O points as high-speed scanning types on the ER bus.\u003c\/p\u003e\n\u003cp\u003eThe high-speed scanning allocation is therefore configuration-dependent. The number of points assigned to this category must be considered when planning the control I\/O configuration.\u003c\/p\u003e\n\u003ch3\u003eBus Connection and Installation\u003c\/h3\u003e\n\u003cp\u003eExternal bus connections use pressure clamp terminals on a removable terminal block. The terminal block incorporates built-in terminators that can be switched on or off, allowing termination settings to be configured at the fieldbus connection.\u003c\/p\u003e\n\u003cp\u003eThe module connects to its terminal board through a dedicated cable. Supported installation locations include the following module units:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eANB10, ANB11\u003c\/li\u003e\n\u003cli\u003eAFV30, AFV40\u003c\/li\u003e\n\u003cli\u003eA2FV50, A2FV70\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe exact suffix and hardware configuration of the installation unit should be checked against the applicable system configuration.\u003c\/p\u003e\n\u003ch3\u003eRedundancy and Electrical Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe ALF111-S50 supports dual-redundant operation. Two ALF111 modules can be configured in the designated adjacent slots within the same node unit. This arrangement provides a redundant communication module configuration.\u003c\/p\u003e\n\u003cp\u003eThe module has a specified withstand voltage of 1500 V AC for one minute. This applies to isolation between the primary and secondary sides and between channels. Its current consumption is 0.5 A or less.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cfigure\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\u003c\/td\u003e\n\u003ctd\u003eALF111-S50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBase Model\u003c\/td\u003e\n\u003ctd\u003eALF111\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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eFOUNDATION Fieldbus Communication Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eN-IO\/FIO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eFOUNDATION Fieldbus, 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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSegments\u003c\/td\u003e\n\u003ctd\u003e1 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\u003eMaximum Control I\/O\u003c\/td\u003e\n\u003ctd\u003e48 points per segment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHigh-Speed Scanning\u003c\/td\u003e\n\u003ctd\u003eUp to 6 I\/O points per segment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Fieldbus Devices\u003c\/td\u003e\n\u003ctd\u003e32 units per segment, including ALF111\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Functions\u003c\/td\u003e\n\u003ctd\u003eLAS function, clock master function\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRedundancy\u003c\/td\u003e\n\u003ctd\u003eDual-redundant configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBus Connection\u003c\/td\u003e\n\u003ctd\u003ePressure clamp terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Block\u003c\/td\u003e\n\u003ctd\u003eRemovable, with built-in switchable terminators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Board Connection\u003c\/td\u003e\n\u003ctd\u003eDedicated cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eANB10, ANB11, AFV30, AFV40, A2FV50, A2FV70\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWithstand Voltage\u003c\/td\u003e\n\u003ctd\u003e1500 V AC for 1 minute\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Consumption\u003c\/td\u003e\n\u003ctd\u003e0.5 A or less\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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eModel and Suffix Identification\u003c\/h3\u003e\n\u003cp\u003eThe ordering designation ALF111-S50 consists of the ALF111 base model and the specified suffix codes.\u003c\/p\u003e\n\u003cfigure\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eCode\u003c\/th\u003e\n\u003cth\u003eDescription\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eALF111\u003c\/td\u003e\n\u003ctd\u003eFOUNDATION Fieldbus Communication Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e-S\u003c\/td\u003e\n\u003ctd\u003eStandard type\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eWithout explosion protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e0\u003c\/td\u003e\n\u003ctd\u003eBasic type\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp\u003eThe -S50 configuration identifies the standard, non-explosion-protected, basic version. Explosion protection should not be assumed for this model when selecting equipment for hazardous-area installations.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How many FOUNDATION Fieldbus devices can the ALF111-S50 support?\u003c\/p\u003e\n\u003cp\u003eA: The maximum is 32 units per segment, including the ALF111 module itself. Since the module provides four ports with one segment per port, the device limit must be calculated separately for each segment.\u003c\/p\u003e\n\u003cp\u003eQ: Does the ALF111-S50 support redundant operation?\u003c\/p\u003e\n\u003cp\u003eA: Yes. Two ALF111 modules can be installed in the designated adjacent slots of the same node unit to establish a dual-redundant configuration.\u003c\/p\u003e\n\u003cp\u003eQ: Can the ALF111-S50 be used in explosion-protected installations?\u003c\/p\u003e\n\u003cp\u003eA: The suffix code 5 specifies a version without explosion protection. This model should not be treated as an explosion-protected device. Verify the required hazardous-area protection separately when selecting fieldbus communication hardware.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":68248544477426,"sku":"ALF111-S50","price":235.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0730\/5589\/5794\/files\/ALF111-S502.jpg?v=1793607289","url":"https:\/\/www.petrospare.com\/products\/yokogawa-alf111-s50-foundation-fieldbus-communication-module","provider":"Petro Spare Industrial Limited","version":"1.0","type":"link"}