{"product_id":"communication-module-yokogawa-nflr121-s00-serial","title":"Communication Module | Yokogawa NFLR121-S00 Serial","description":"\u003ch2\u003eYokogawa NFLR121-S00 RS-422\/RS-485 Communication Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa NFLR121-S00\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eYokogawa NFLR121\u003c\/strong\u003e RS-422\/RS-485 Communication Module, operates as a dedicated hardware component for serial data transmission and subsystem interfacing within distributed control system platforms. The module executes physical layer matching and serial protocol translation over dual isolated ports, enabling direct asynchronous multipoint communication between host controllers and legacy field devices.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNFLR121\u003c\/strong\u003e: Base model identification for the 2-port RS-422\/RS-485 Serial Communication Module.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e-S\u003c\/strong\u003e: Standard hardware type designation with no specialized explosion protection options.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0\u003c\/strong\u003e: Basic implementation design specification code.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0\u003c\/strong\u003e: Style category iteration tracking number.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\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\u003eNFLR121-S00\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\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\u003e0.11kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e2.2 cm x 12.4 cm x 12.6 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to 75 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHumidity\u003c\/td\u003e\n\u003ctd\u003e20 to 90% RH (non-condensing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e5 VDC plus\/minus 5% (from backplane bus)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Consumption\u003c\/td\u003e\n\u003ctd\u003e500 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSerial Interfaces\u003c\/td\u003e\n\u003ctd\u003e2 x RS-422\/RS-485 ports\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Topology\u003c\/td\u003e\n\u003ctd\u003eMultipoint configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Mode\u003c\/td\u003e\n\u003ctd\u003eHalf-duplex \/ Full-duplex selection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSynchronization Method\u003c\/td\u003e\n\u003ctd\u003eStart-stop asynchronous synchronization\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Transfer Speed\u003c\/td\u003e\n\u003ctd\u003e300 bps to 115.2 kbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Distance\u003c\/td\u003e\n\u003ctd\u003eMaximum 1200 m (dependent on baud rate and wire gauge)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Code\u003c\/td\u003e\n\u003ctd\u003eASCII \/ Binary format support\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFraming Configurations\u003c\/td\u003e\n\u003ctd\u003eCharacter length: 7\/8 bits; Stop bits: 1\/2 bits; Parity: None\/even\/odd\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDistributed Control System Bus Routing \u0026amp; Signal Isolation\u003c\/h3\u003e\n\u003cp\u003eThe module architecture implements internal electrical isolation logic between the primary backplane bus and the dual serial communication interfaces. These isolation boundaries mitigate common-mode noise issues and shield internal processing electronics from field-side electrical surges. The physical serial loops operate concurrently with standard 4-20 mA HART loop protocol instruments across the same automation nodes, passing data arrays into system registers without introducing transmission jitter or disrupting deterministic CPU bus cycles.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How are termination resistors configured for long-distance RS-485 multipoint wiring?\u003c\/p\u003e\n\u003cp\u003eA: The physical installation requires setting internal jumpers or mounting external 120 ohm resistors across the positive and negative signal pairs at the final physical node of the 1200 m segment to suppress line reflections.\u003c\/p\u003e\n\u003cp\u003eQ: Can the physical ports be assigned different transmission parameters simultaneously?\u003c\/p\u003e\n\u003cp\u003eA: The independent internal interface circuitry allows each of the two serial channels to be provisioned with distinct baud rate, parity, and framing metrics within the system configuration tools.\u003c\/p\u003e\n\u003cp\u003eQ: What indication marks a communication error detected by the module firmware?\u003c\/p\u003e\n\u003cp\u003eA: The hardware monitors frame execution, updating dedicated internal status registers with parity, overrun, or framing error bits that are read continuously by the central processor unit diagnostics.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eInsertion Protocol: Slide the unit straight along the designated slot guides of the backplane rack until the bus connectors mesh fully. Tighten the grounding retention fasteners to ensure robust chassis bonding and resistance to structural vibration.\u003c\/li\u003e\n\u003cli\u003eSignal Cable Routing: Run all serial communication cables in dedicated low-voltage wireways isolated from high-voltage motor control and switching lines. Utilize twisted-pair shielded instrumentation cables to minimize ambient electromagnetic interference.\u003c\/li\u003e\n\u003cli\u003eShielding and Earth Reference: Terminate the overall cable shield braid at a single point to the cabinet copper instrumentation clean ground bar. Ensure the grounding system exhibits resistance parameters under 1 ohm to ground for effective transient dissipation.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43767955816538,"sku":"NFLC121-S00","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/698..jpg?v=1785468452","url":"https:\/\/www.spareoil.com\/ar\/products\/communication-module-yokogawa-nflr121-s00-serial","provider":"SpareOil Automation","version":"1.0","type":"link"}