{"product_id":"yokogawa-alr121-s51-serial-communication-module-fcs-interface","title":"Yokogawa ALR121-S51 Serial Communication Module | FCS Interface","description":"\u003ch3\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eYokogawa ALR121-S51\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a high-reliability serial communication module engineered for seamless integration with Yokogawa\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCENTUM VP\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCENTUM CS 3000\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003econtrol systems. Designed to maintain continuous data flow between Field Control Stations (FCS) and peripheral devices, this module provides robust and precise communication for demanding industrial environments.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Speed, Stable Communication\u003c\/strong\u003e\u003cbr\u003eThe module ensures real-time transmission with minimal latency, suitable for critical process control where timing and reliability are essential.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVersatile Serial Connectivity\u003c\/strong\u003e\u003cbr\u003eSupports RS-422 and RS-485 interfaces, configurable for 2-wire or 4-wire connections, allowing compatibility with PLCs, analytical instruments, and power monitoring devices.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDual Port Redundancy\u003c\/strong\u003e\u003cbr\u003eEquipped with two independent serial ports to enable redundant communication paths or multiple parallel serial loops.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHot-Swappable Operation\u003c\/strong\u003e\u003cbr\u003eSupports online maintenance, allowing module replacement without powering down the FCS, ensuring uninterrupted process control.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIntegrated Configuration\u003c\/strong\u003e\u003cbr\u003eFull compatibility with the Yokogawa Engineering Environment enables direct mapping of external data to FCS function blocks without third-party drivers.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth\u003eFeature\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\u003e\u003cstrong\u003eALR121-S51\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eRS-422 \/ RS-485\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection Type\u003c\/td\u003e\n\u003ctd\u003e2-wire or 4-wire (switchable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Mode\u003c\/td\u003e\n\u003ctd\u003eHalf-duplex\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSynchronization\u003c\/td\u003e\n\u003ctd\u003eStart-stop\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Speeds\u003c\/td\u003e\n\u003ctd\u003e1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 bps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Format\u003c\/td\u003e\n\u003ctd\u003eASCII or Binary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharacter Length\u003c\/td\u003e\n\u003ctd\u003e7 or 8 bits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStop Bits\u003c\/td\u003e\n\u003ctd\u003e1 or 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParity\u003c\/td\u003e\n\u003ctd\u003eNone, Even, Odd\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003e500 V AC between signals and internal circuitry\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Consumption\u003c\/td\u003e\n\u003ctd\u003e0.5 A at 5 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.34 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFCS rack slot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eALR121-S51\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis ideal for industrial sectors requiring stable serial communication, including:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eChemical and petrochemical plants\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRefineries\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePower generation facilities\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFactory automation with PLC integration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can this module communicate with multiple devices simultaneously?\u003c\/strong\u003e\u003cbr\u003eA: Yes, RS-485 supports multipoint connections, allowing several devices on the same serial loop.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is the module compatible with Modbus protocols?\u003c\/strong\u003e\u003cbr\u003eA: The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eALR121-S51\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efully supports Modbus RTU, operating as both Master and Slave depending on configuration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What maintenance is required?\u003c\/strong\u003e\u003cbr\u003eA: Minimal maintenance is needed; the module supports hot swapping for continuous operation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Are there comparable models in the ALR series?\u003c\/strong\u003e\u003cbr\u003eA: The ALR121-S52 offers higher-speed transmission and extended environmental protection for harsh conditions.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":44126880104547,"sku":"ALR121-S51","price":180.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0549\/2775\/3315\/files\/YOKOGAWAALR121-S51-3.jpg?v=1776654317","url":"https:\/\/precisemodule.com\/products\/yokogawa-alr121-s51-serial-communication-module-fcs-interface","provider":"Precise Module Ltd.","version":"1.0","type":"link"}